Encycolorpedia

#b1b2ac Hex-Farbcode

#b1b2ac Paint ChipDer hexadezimale Farbcode #b1b2ac ist ein mittel-hell Farbton von Gelb-grün. Im RGB-Farbmodell enthält #b1b2ac 69.41% Rot, 69.8% Grün und 67.45% Blau. Im HSL-Farbraum hat #b1b2ac einen Farbtonwinkel von 70° (Grad), 4% Sättigung und 69% Helligkeit. Diese Farbe hat eine ungefähre Wellenlänge von 568.12 nm.

Farbvariationen

Benannte Farben

Farbschemas

Herunterladen: GIMP GPL Adobe ASE (Adobe Swatch Exchange) Sketch Palette

Monochrome Farben

  1. #8f908b
  2. #9a9b96
  3. #a6a7a1
  4. #b1b2ac
  5. #bcbeb7
  6. #c8c9c3
  7. #d4d5cf

Farbtöne und Schattierungen

#b1b2ac nach Weiß

  1. #b1b2ac
  2. #bebeb9
  3. #cacbc7
  4. #d7d8d5
  5. #e4e5e3
  6. #f2f2f1
  7. #ffffff / #fff

#b1b2ac nach Schwarz

  1. #b1b2ac
  2. #91928d
  3. #72736f
  4. #555553
  5. #393938
  6. #20201f
  7. #000000 / #000

Farben

Ähnliche Farben

  1. Ford

    1. ★ Crystal Silver
      #b1b3ad
      ΔE = 0.461 / LRV ≈ 44.6%
    2. ★ Gray
      #b5b6b3
      ΔE = 2.109 / LRV ≈ 46.5%
  2. Designers Guild

    1. ★ Graphite
      #b1b1ab
      ΔE = 0.463 / LRV ≈ 43.7%
  3. Kelly-Moore

    1. ★ Plymouth Gray / 178
      #b1b2ad
      ΔE = 0.474 / LRV ≈ 44.2%
    2. ★ Fitzgerald Smoke / HL 4297-1
      #b4b7b0
      ΔE = 1.859 / LRV ≈ 46.7%
  4. Evonik-Degussa

    1. ★ 4245P Folkstone
      #b0b2ab
      ΔE = 0.598 / LRV ≈ 44.0%
    2. 842
      #bbb7af
      ΔE = 2.967 / LRV ≈ 47.5%
  5. Sico

    1. ★ 6204-41 Country Road
      #b0b3ad
      ΔE = 0.744 / LRV ≈ 44.5%
    2. 6203-31 Burmese Cat
      #aab3af
      ΔE = 2.996 / LRV ≈ 43.9%
  6. Behr

    1. ★ 8497 Ice Grey
      #b0b3ad
      ΔE = 0.744 / LRV ≈ 44.5%
    2. DP-504 Plymouth Gray
      #acaca3
      ΔE = 2.674 / LRV ≈ 40.9%
  7. Chrysler

    1. ★ Gray
      #b3b4ad
      ΔE = 0.851 / LRV ≈ 45.2%
    2. Gray
      #b9b7b4
      ΔE = 2.812 / LRV ≈ 47.5%
  8. Alcro

    1. ★ Pearl Grey
      #b3b2ad
      ΔE = 0.883 / LRV ≈ 44.4%
    2. ★ Himalaya
      #b4b7b3
      ΔE = 2.120 / LRV ≈ 46.8%
  9. Resene

    1. ★ Half Delta G76-011-122
      #aeb0aa
      ΔE = 0.893 / LRV ≈ 43.0%
    2. ★ Eighth Tapa N78-005-103
      #b7b8b2
      ΔE = 2.209 / LRV ≈ 47.6%
  10. Pratt & Lambert

    1. ★ Minnow 28-25
      #b0b3ae
      ΔE = 0.902 / LRV ≈ 44.5%
  11. GM / General Motors

    1. ★ Gray Green
      #b0b3ae
      ΔE = 0.902 / LRV ≈ 44.5%
    2. ★ Mist Gray
      #b3b6b0
      ΔE = 1.498 / LRV ≈ 46.2%
  12. Nippon Paint

    1. ★ Gray Shirt / NP N 2032 P
      #b1b2aa
      ΔE = 0.948 / LRV ≈ 44.1%
    2. ★ Folkstone / NP N 2028 P
      #b3b6af
      ΔE = 1.541 / LRV ≈ 46.1%
  13. Colortrend

    1. ★ Quincy Granite
      #b4b4ad
      ΔE = 0.986 / LRV ≈ 45.4%
    2. 0540
      #b7b4b2
      ΔE = 2.697 / LRV ≈ 45.9%
  14. Rodda Paint

    1. ★ Quincy Granite H143
      #b4b4ad
      ΔE = 0.986 / LRV ≈ 45.4%
    2. Platinum Plate 8297
      #b9b8b3
      ΔE = 2.544 / LRV ≈ 47.9%
  15. Devoe Paint

    1. ★ Surreal Blue / 30BB 45/015
      #b2b2ae
      ΔE = 1.019 / LRV ≈ 44.4%
    2. Silver Reef / 50YR 45/014
      #b7b1a9
      ΔE = 2.680 / LRV ≈ 44.4%
  16. British Standard

    1. ★ BS381 627 - Light aircraft grey
      #b1b0ab
      ΔE = 1.026 / LRV ≈ 43.3%
    2. ★ BS 2660 BS 9-095 - Minerva grey
      #b7b4ad
      ΔE = 1.825 / LRV ≈ 45.7%
  17. KILZ

    1. ★ Warm Ashes / H801
      #b4b5af
      ΔE = 1.106 / LRV ≈ 45.8%
  18. Sherwin-Williams

    1. ★ Magnetic Gray - 7058
      #b2b5af
      ΔE = 1.187 / LRV ≈ 45.6%
    2. ★ Chelsea Gray - 2850
      #b6b7b0
      ΔE = 1.872 / LRV ≈ 46.9%
  19. TRUMATCH

    1. ★ 17-g6
      #b2b5af
      ΔE = 1.187 / LRV ≈ 45.6%
    2. ★ 13-g6
      #b6b6ae
      ΔE = 1.803 / LRV ≈ 46.5%
  20. Coronado Paint

    1. ★ 8297 - Platinum Plate
      #b3b1ac
      ΔE = 1.192 / LRV ≈ 44.0%
    2. ★ 8306 - Zephyr
      #b5b5b0
      ΔE = 1.350 / LRV ≈ 46.0%
  21. Toyo Ink

    1. ★ CF10768
      #b4b2ab
      ΔE = 1.196 / LRV ≈ 44.5%
    2. ★ CF10774
      #b3b5ad
      ΔE = 1.395 / LRV ≈ 45.6%
  22. Caparol

    1. ★ Biscaya / Biscaya F8
      #b4b4ac
      ΔE = 1.264 / LRV ≈ 45.3%
    2. 2703-Y12R
      #b8b8b0
      ΔE = 2.446 / LRV ≈ 47.6%
  23. Tikkurila

    1. ★ 569X
      #b0afaa
      ΔE = 1.264 / LRV ≈ 42.8%
    2. 617X
      #b1b4b3
      ΔE = 2.654 / LRV ≈ 45.2%
  24. Graham & Brown

    1. ★ Radiator Springs
      #adafaa
      ΔE = 1.306 / LRV ≈ 42.4%
    2. ★ Asian Spirit
      #b7b4af
      ΔE = 1.871 / LRV ≈ 45.8%
  25. Jotun

    1. ★ 0762 / Capri
      #b4b3af
      ΔE = 1.327 / LRV ≈ 45.0%
    2. ★ 9930 / Tåkedis
      #b5b5b1
      ΔE = 1.600 / LRV ≈ 46.0%
  26. Bristol

    1. ★ Windsor / P223-N4
      #b1b4b0
      ΔE = 1.367 / LRV ≈ 45.1%
    2. ★ Silver Skates / P225-N3
      #b0b4b0
      ΔE = 1.563 / LRV ≈ 45.0%
  27. Taubmans

    1. ★ Overcast Sea / T12 8.D4
      #acb0aa
      ΔE = 1.446 / LRV ≈ 42.7%
    2. Stone Patino / T163-4
      #b9b5ab
      ΔE = 2.937 / LRV ≈ 46.3%
  28. Valspar Paint

    1. ★ Glass Houses R287D
      #b5b4ac
      ΔE = 1.452 / LRV ≈ 45.4%
    2. Mountain Boulder R12C
      #b7b1ad
      ΔE = 2.746 / LRV ≈ 44.5%
  29. Sigma

    1. ★ Mineral Grey / S 3500-N
      #adb0ac
      ΔE = 1.473 / LRV ≈ 42.9%
    2. ★ Warm Red / 6329 B
      #b1b2b0
      ΔE = 1.901 / LRV ≈ 44.3%
  30. Earthpaint

    1. ★ 5-20-3 Flannel
      #b3b3aa
      ΔE = 1.507 / LRV ≈ 44.7%
    2. 5-29-2 Night Sail
      #b3b9b3
      ΔE = 2.806 / LRV ≈ 47.5%
  31. Vallejo

    1. ★ Vallejo 70.796 #217
      #b4b1ac
      ΔE = 1.530 / LRV ≈ 44.1%
  32. Duron

    1. ★ Magnetic Gray
      #b4b6b1
      ΔE = 1.546 / LRV ≈ 46.3%
    2. Dorian Gray
      #b3afa6
      ΔE = 2.421 / LRV ≈ 43.0%
  33. Crown Diamond

    1. ★ 7402-41 Hailstorm
      #afaea9
      ΔE = 1.556 / LRV ≈ 42.3%
    2. ★ 7399-31 Bonsecours Market
      #abada7
      ΔE = 1.963 / LRV ≈ 41.3%
  34. Audi

    1. ★ Sahara Silver Metallic / 9T, 9T9T, LX7X
      #b3b0a9
      ΔE = 1.581 / LRV ≈ 43.5%
    2. Lotusgrau Metallic / LX7Q
      #b4b2b1
      ΔE = 2.681 / LRV ≈ 44.7%
  35. Tollens

    1. ★ T2143-1
      #b0b0a7
      ΔE = 1.647 / LRV ≈ 43.1%
    2. ★ T2143-2
      #b2b4aa
      ΔE = 1.993 / LRV ≈ 45.0%
  36. General Paint

    1. ★ Charleston / CL 3172W
      #b2b4b1
      ΔE = 1.658 / LRV ≈ 45.3%
    2. Wavelength / CL 3214M
      #acaaa5
      ΔE = 2.950 / LRV ≈ 40.2%
  37. Magnolia Home

    1. ★ Cupola / JG-14
      #b0aea7
      ΔE = 1.736 / LRV ≈ 42.3%
  38. Rolls Royce

    1. ★ Arctica / 9561001
      #adb2ae
      ΔE = 1.763 / LRV ≈ 43.8%
  39. Natural Color System / NCS

    1. ★ S 2502-G
      #b5b4ab
      ΔE = 1.781 / LRV ≈ 45.4%
    2. S 2502-B
      #b5b3b2
      ΔE = 2.755 / LRV ≈ 45.3%
  40. Zoffany

    1. ★ Storm Grey
      #b2b5ac
      ΔE = 1.794 / LRV ≈ 45.5%
  41. Dulux Australia

    1. ★ Colorbond® Shale Grey / O23
      #b4b5b2
      ΔE = 1.854 / LRV ≈ 46.0%
  42. Mylands of London

    1. ★ Neutral White
      #b1b1af
      ΔE = 1.932 / LRV ≈ 43.9%
  43. Lamborghini

    1. ★ Bianco Cygnus / LY9H
      #b7b4ac
      ΔE = 1.981 / LRV ≈ 45.7%
  44. Dutch Boy

    1. ★ Stonewall Jackson
      #afada8
      ΔE = 1.981 / LRV ≈ 41.8%
    2. Flourish
      #b3b0ae
      ΔE = 2.457 / LRV ≈ 43.7%
  45. Levis

    1. ★ Atl Matin B4
      #b7b3ac
      ΔE = 1.995 / LRV ≈ 45.3%
    2. Shady Grey B40
      #b2b1a5
      ΔE = 2.953 / LRV ≈ 43.6%
  46. Flügger

    1. ★ Vestenvind (U-727)
      #b1afa6
      ΔE = 2.025 / LRV ≈ 42.8%
    2. Neutral Grey 5 (IN-714)
      #b7b7b5
      ΔE = 2.795 / LRV ≈ 47.3%
  47. Brillux

    1. ★ 78.01.12
      #b1b5b2
      ΔE = 2.062 / LRV ≈ 45.6%
    2. 87.03.15
      #aeb0a5
      ΔE = 2.579 / LRV ≈ 42.8%
  48. Sanderson

    1. ★ Grey Squirrel
      #adada5
      ΔE = 2.095 / LRV ≈ 41.5%
  49. Geely

    1. ★ Snow White / 208
      #b2b7b0
      ΔE = 2.105 / LRV ≈ 46.5%
  50. ICI Paints

    1. ★ Dusty Miller 50GY 45/037
      #acb1a8
      ΔE = 2.130 / LRV ≈ 43.0%
    2. Skyscraper 30BB 45/008
      #aeafae
      ΔE = 2.573 / LRV ≈ 42.7%
  51. Dulux

    1. ★ Misty Mountain
      #b8b4ad
      ΔE = 2.157 / LRV ≈ 45.9%
    2. Flying Feather
      #b1aeac
      ΔE = 2.656 / LRV ≈ 42.6%
  52. Olympic

    1. ★ Georgian Silver D64-3
      #abb1ad
      ΔE = 2.165 / LRV ≈ 43.1%
    2. Gray Marble D31-3
      #b7b2af
      ΔE = 2.705 / LRV ≈ 45.0%
  53. California Paints

    1. ★ Quincy Granite
      #b5b8b2
      ΔE = 2.173 / LRV ≈ 47.3%
    2. Vinal Haven
      #a9b0ad
      ΔE = 2.849 / LRV ≈ 42.5%
  54. Peintures MF

    1. ★ Stirling
      #b0ada6
      ΔE = 2.179 / LRV ≈ 41.9%
  55. RAL

    1. ★ RAL 7038 / Agate grey
      #b5b8b1
      ΔE = 2.192 / LRV ≈ 47.3%
  56. Colorhouse

    1. ★ Metal .03
      #b5b8b1
      ΔE = 2.192 / LRV ≈ 47.3%
  57. Vista Paint

    1. ★ Platinum Plate
      #b8b7b2
      ΔE = 2.202 / LRV ≈ 47.3%
  58. Scib Paints

    1. ★ Platinum Plate / 8297
      #b8b7b2
      ΔE = 2.202 / LRV ≈ 47.3%
  59. Berger

    1. ★ Platinum Plate / 8297
      #b8b7b2
      ΔE = 2.202 / LRV ≈ 47.3%
  60. Pascol

    1. ★ Haunted Castle PZ2130
      #aaada6
      ΔE = 2.209 / LRV ≈ 41.2%
    2. Colorbond® Shale Grey PZ2140
      #b8b8af
      ΔE = 2.638 / LRV ≈ 47.6%
  61. Wattyl

    1. ★ Castle Grey / A25W
      #abaca7
      ΔE = 2.244 / LRV ≈ 41.0%
    2. ★ Colorbond Shale Grey ® / A24W
      #b7b8b3
      ΔE = 2.287 / LRV ≈ 47.6%
  62. Little Greene

    1. ★ Bone China Blue Deep
      #b0b5b2
      ΔE = 2.247 / LRV ≈ 45.5%
  63. Dacia

    1. ★ Alb Alpin White / QNA
      #b2b6b3
      ΔE = 2.256 / LRV ≈ 46.2%
  64. Teknos

    1. ★ GBI077
      #acadaa
      ΔE = 2.268 / LRV ≈ 41.6%
    2. PR530
      #b4b1af
      ΔE = 2.437 / LRV ≈ 44.2%
  65. New Look

    1. ★ Pride and Joy / B12-08
      #b7b8b3
      ΔE = 2.287 / LRV ≈ 47.6%
  66. CIL

    1. ★ Zeppelin
      #b8b4ac
      ΔE = 2.288 / LRV ≈ 45.8%
    2. Aged Stucco
      #b7b5aa
      ΔE = 2.851 / LRV ≈ 46.0%
  67. Benjamin Moore

    1. Sea Haze / 2137-50
      #b4b6ac
      ΔE = 2.302 / LRV ≈ 46.1%
    2. Fieldstone / 1558
      #b1b1a6
      ΔE = 2.433 / LRV ≈ 43.5%
  68. Marston & Langinger

    1. Wirework
      #acaca8
      ΔE = 2.318 / LRV ≈ 41.1%
  69. Pantone / PMS

    1. Cool Grey 5
      #b8b3ad
      ΔE = 2.322 / LRV ≈ 45.4%
    2. Cool Grey 6
      #b5b0ad
      ΔE = 2.656 / LRV ≈ 43.9%
  70. Volkswagen

    1. Fontana Gray
      #b5b6ac
      ΔE = 2.322 / LRV ≈ 46.3%
  71. Clark+Kensington

    1. Outdoor Café / 1064
      #b0b6b2
      ΔE = 2.340 / LRV ≈ 45.9%
    2. Stone Fireplace / N-C12
      #acb0af
      ΔE = 2.835 / LRV ≈ 42.9%
  72. Federal Standard

    1. Federal Standard 26440
      #b9b7b1
      ΔE = 2.340 / LRV ≈ 47.4%
    2. Federal Standard 36463
      #b1b3b2
      ΔE = 2.480 / LRV ≈ 44.8%
  73. Albany Paint

    1. Morning Mist
      #acb2af
      ΔE = 2.356 / LRV ≈ 43.7%
  74. Sikkens

    1. LN.02.67
      #b3b8b2
      ΔE = 2.366 / LRV ≈ 47.1%
    2. ON.00.64
      #afafae
      ΔE = 2.553 / LRV ≈ 42.8%
  75. Plascon

    1. Castle Stone Y5-E2-2
      #acaca4
      ΔE = 2.427 / LRV ≈ 41.0%
    2. Ageless Y3-E2-2
      #b0aca4
      ΔE = 2.771 / LRV ≈ 41.4%
  76. Dunn-Edwards

    1. Pebble Walk / 1078
      #afb2a7
      ΔE = 2.479 / LRV ≈ 43.7%
  77. Cloverdale Paint

    1. Platinum Plate / 8297
      #b9b8b3
      ΔE = 2.544 / LRV ≈ 47.9%
  78. PPG Pittsburgh Paints

    1. Mercurial / PPG1006-4
      #b6b0a9
      ΔE = 2.568 / LRV ≈ 43.9%
    2. Georgian Silver 507-4
      #acb2b0
      ΔE = 2.704 / LRV ≈ 43.7%
  79. Great Wall

    1. Titanium White / 0904C
      #b4b2a7
      ΔE = 2.596 / LRV ≈ 44.3%
  80. AMC

    1. Light Driftwood
      #bab6b1
      ΔE = 2.666 / LRV ≈ 47.1%
    2. Dartmouth Gray
      #acadac
      ΔE = 2.935 / LRV ≈ 41.6%
  81. Glidden

    1. Candlestick Silver / 30YY 46/036
      #bab6b1
      ΔE = 2.666 / LRV ≈ 47.1%
    2. Gray Marble / PPG1002-4
      #b9b4b1
      ΔE = 2.945 / LRV ≈ 46.1%
  82. McCormick Paints

    1. 452 Flintstone
      #b4b2b1
      ΔE = 2.681 / LRV ≈ 44.7%
  83. Saipa

    1. White / 1510
      #b8b9b1
      ΔE = 2.687 / LRV ≈ 48.1%
  84. Diamond Vogel

    1. Praise Giving / 0540
      #b7b4b2
      ΔE = 2.697 / LRV ≈ 45.9%
    2. Slate Stone / 0441
      #b0b7ae
      ΔE = 2.817 / LRV ≈ 46.2%
  85. Beckers

    1. Natursten 534 / 3303-Y31R
      #aeaba6
      ΔE = 2.722 / LRV ≈ 40.9%
    2. Knop 509 / S 3000-N
      #b2b2b2
      ΔE = 2.869 / LRV ≈ 44.5%
  86. Setra Evo

    1. Arktisweiss / EVO 4272
      #aeb4b2
      ΔE = 2.727 / LRV ≈ 44.9%
  87. Craig & Rose

    1. Barony
      #b6b9b0
      ΔE = 2.810 / LRV ≈ 47.8%
  88. Volvo

    1. Athenian White / DMC-08F
      #afb5b3
      ΔE = 2.811 / LRV ≈ 45.4%
  89. Mahindra

    1. Arctic White / 432
      #b7b9b0
      ΔE = 2.812 / LRV ≈ 47.9%
  90. Tata

    1. Poly Arctic White / 902
      #acb0af
      ΔE = 2.835 / LRV ≈ 42.9%
  91. Holden

    1. Arc White / J070
      #b0b2a6
      ΔE = 2.866 / LRV ≈ 43.8%
  92. 1829

    1. Nickel
      #b5b6b5
      ΔE = 2.872 / LRV ≈ 46.6%
  93. Porter Paints

    1. Gray Stone / 517-4
      #b9b8b5
      ΔE = 2.922 / LRV ≈ 47.9%
    2. Gray Marble / 530-4
      #b9b4b1
      ΔE = 2.945 / LRV ≈ 46.1%
  94. Australian Standard AS2700

    1. N33 Lightbox Grey
      #acadac
      ΔE = 2.935 / LRV ≈ 41.6%
  95. Jedynka

    1. Pd 1177
      #b3b6b5
      ΔE = 2.939 / LRV ≈ 46.4%

#b1b2ac Beispiele für HTML und CSS

#b1b2ac Vordergrund

Eile mit Weile.

<p style="color: #b1b2ac">…</p>

#b1b2ac Hintergrund

Übung macht den Meister.

<p style="background-color: #b1b2ac">…</p>

#b1b2ac Textschatten

Der Hunger kommt beim Essen.

<p style="text-shadow: 0.1em 0.1em 0.15em #b1b2ac">…</p>

Farbkompositionsdiagramme

Farbräume

Dezimalzahl
11645612
Binär
10110001, 10110010, 10101100
Hexadezimal
#b1b2ac
LRV
≈ 44.2%
Naheste kurze Hexadezimalzahl
#aaa ΔE = 4.268
RGB
rgb(177, 178, 172)
RGBA
rgba(177, 178, 172, 1.0)
RG-Chromatizität
r: 0.336, g: 0.338, b: 0.326
RYB
Rot: 67.451%, Gelb: 69.804%, Blau: 67.843%
Android / android.graphics.Color
-5131604 / 0xffb1b2ac
HSL
hsl(70, 4%, 69%)
HSLA
hsla(70, 4%, 69%, 1.0)
HSV / HSB
Farbton: 70° (70.000), Sättigung: 3% (0.034), Wert: 70% (0.698)
HSP
Farbton: 70.000, Sättigung: 3.371%, wahrgenommene Helligkeit: 69.422%
HSLuv (HUSL)
H: 92.992, S: 5.629, L: 72.340
Cubehelix
H: -294.735, S: 0.047, L: 0.694
TSL
T: 1.065, S: 0.007, L: 0.694
CMYK
Cyan: 1% (0.006), Magenta: 0% (0.000), Gelb: 3% (0.034), Schwarzanteil Key: 30% (0.302)
CMY
Cyan: 31% (0.306), Magenta: 30% (0.302), Gelb: 33% (0.325)
XYZ
X: 41.497, Y: 44.167, Z: 45.361
xyY
x: 0.317, y: 0.337, Y: 44.167
CIELab
L: 72.340, a: -1.462, b: 2.938
CIELuv
L: 72.340, u: -0.238, v: 4.545
CIELCH / LCHab
L: 72.340, C: 3.282, H: 116.466
CIELUV / LCHuv
L: 72.340, C: 4.551, H: 92.992
Hunter-Lab
L: 66.458, a: -4.844, b: 6.052
CIECAM02
J: 64.046, C: 3.498, h: 128.233, Q: 157.673, M: 3.059, s: 13.929, H: 160.261
OSA-UCS
Leichtigkeit: -10.066, Gelb: 0.331, Grün: 0.435
LMS
L: 42.016, M: 46.052, S: 45.333
YCbCr
Y: 168.057, Cb: 125.514, Cr: 127.987
YCgCo
Y: 176.250, Cg: 1.750, Co: 45.500
YDbDr
Y: 177.017, Db: -7.548, Dr: 0.031
YPbPr
Y: 177.355, Pb: -2.885, Pr: -0.224
xvYCC
Y: 168.317, Cb: 125.466, Cr: 127.803
YIQ
Y: 177.017, I: 1.332, Q: -2.078
YUV
Y: 177.017, U: -2.467, V: -0.015
Munsell-Farbsystem
5R 7/1 ΔE = 3.342
Markenfarbe
Wii ΔE = 9.690

Zufällige Farben

Rot

Grün

Blau