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Colour

#666B78

  • #666B78
  • Blue
  • Dark
  • Nearest: Dim grey

#666B78 is a blue with RGB values 102, 107, 120 and HSL 223°, 8%, 44%. It is a dark colour, so white text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Dim grey.

Colour values

#666B78#666B78
HEX#666B78
RGBrgb(102, 107, 120)
RGB (0–1)0.4, 0.4196, 0.4706
RGB percentages40%, 42%, 47.1%
HSLhsl(223.3, 8.1%, 43.5%)
HSV / HSBhsv(223.3, 15%, 47.1%)
CMYK15%, 10.8%, 0%, 52.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,712,184
CSS custom property--colour: #666B78;

Brightness & contrast

Relative luminance0.14696WCAG 2.x, 0 is black and 1 is white
Perceived brightness107.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.33:1
Contrast with white5.33:1WCAG normal text: AA
Contrast with black3.94:1WCAG normal text: Fail
Greyscale equivalent#6B6B6B
Inverted#999487

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#676C79no red cones; affects about 1% of men; ΔE 0.4 from the original
Deuteranopia#666A78no green cones; the most common form, about 1% of men; ΔE 0.8 from the original
Tritanopia#626D6Fno blue cones; rare, and affects men and women equally; ΔE 7.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5.33:1WCAG large text: AAA
Contrast with black, large text3.94:1WCAG large text: AA

Named colours

Dim grey · ΔE 8Slate grey · ΔE 8.7Gray · ΔE 11.5Light slate grey · ΔE 11.6Dark slate grey · ΔE 19.3Dark grey · ΔE 25.3
Nearest named CSS colourDim grey (#696969)ΔE 7.98, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#787366
Analogous#667478, #6A6678
Triadic#78666B, #6B7866
Split complementary#786A66, #747866
Tetradic#786674, #787366, #66786A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D2D3D8
Lighter +30%#B6B9C1
Lighter +20%#9A9FAA
Lighter +10%#7F8492
Darker −10%#4F525C
Darker −20%#373A41
Darker −30%#202125
Darker −40%#08090A
More saturated +25%#4A5F94
Less saturated −25%#6F6F6F

Channel breakdown

R102
G107
B120
Red102 (40%)
Green107 (42%)
Blue120 (47.1%)
Hue223.33°
Saturation (HSL)8.11%
Lightness43.53%
Dominant channelBlue
Hex per channelR 66 · G 6B · B 78

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Every value on this page was computed from “666b78” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.