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Recognised as Colour

#668BB7

  • #668BB7
  • Blue
  • Dark
  • Nearest: Steel blue

#668BB7 is a blue with RGB values 102, 139, 183 and HSL 213°, 36%, 56%. It is a dark colour, so black text on it reaches 5.9:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#668BB7#668BB7
HEX#668BB7
RGBrgb(102, 139, 183)
RGB (0–1)0.4, 0.5451, 0.7176
RGB percentages40%, 54.5%, 71.8%
HSLhsl(212.6, 36%, 55.9%)
HSV / HSBhsv(212.6, 44.3%, 71.8%)
CMYK44.3%, 24%, 0%, 28.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,720,439
CSS custom property--colour: #668BB7;

Brightness & contrast

Relative luminance0.24709WCAG 2.x, 0 is black and 1 is white
Perceived brightness135.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.94:1
Contrast with white3.53:1WCAG normal text: Fail
Contrast with black5.94:1WCAG normal text: AA
Greyscale equivalent#868686
Inverted#997448

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#7A8DB9no red cones; affects about 1% of men; ΔE 5.6 from the original
Deuteranopia#7085B6no green cones; the most common form, about 1% of men; ΔE 6.1 from the original
Tritanopia#47959Ano blue cones; rare, and affects men and women equally; ΔE 27.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.53:1WCAG large text: AA
Contrast with black, large text5.94:1WCAG large text: AAA

Named colours

Steel blue · ΔE 7.4Light slate grey · ΔE 16Slate grey · ΔE 17Light steelblue · ΔE 24.7Light skyblue · ΔE 25Cornflower blue · ΔE 25.1
Nearest named CSS colourSteel blue (#4682B4)ΔE 7.37, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B79266
Analogous#66B3B7, #6A66B7
Triadic#B7668B, #8BB766
Split complementary#B76A66, #B3B766
Tetradic#B766B3, #B79266, #66B76A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#F1F4F8
Lighter +30%#CEDAE8
Lighter +20%#ABC0D8
Lighter +10%#89A5C7
Darker −10%#4B719F
Darker −20%#3B597C
Darker −30%#2A405A
Darker −40%#1A2737
More saturated +25%#4A89D3
Less saturated −25%#828D9B

Channel breakdown

R102
G139
B183
Red102 (40%)
Green139 (54.5%)
Blue183 (71.8%)
Hue212.59°
Saturation (HSL)36%
Lightness55.88%
Dominant channelBlue
Hex per channelR 66 · G 8B · B B7

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Every value on this page was computed from “668bb7” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.