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Recognised as Colour

#668EAE

  • #668EAE
  • Blue
  • Dark
  • Nearest: Light slate grey

#668EAE is a blue with RGB values 102, 142, 174 and HSL 207°, 31%, 54%. It is a dark colour, so black text on it reaches 6:1 contrast (AA for normal text). The nearest named colour is Light slate grey.

Colour values

#668EAE#668EAE
HEX#668EAE
RGBrgb(102, 142, 174)
RGB (0–1)0.4, 0.5569, 0.6824
RGB percentages40%, 55.7%, 68.2%
HSLhsl(206.7, 30.8%, 54.1%)
HSV / HSBhsv(206.7, 41.4%, 68.2%)
CMYK41.4%, 18.4%, 0%, 31.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,721,198
CSS custom property--colour: #668EAE;

Brightness & contrast

Relative luminance0.25227WCAG 2.x, 0 is black and 1 is white
Perceived brightness135.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.05:1
Contrast with white3.47:1WCAG normal text: Fail
Contrast with black6.05:1WCAG normal text: AA
Greyscale equivalent#888888
Inverted#997151

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#818EB0no red cones; affects about 1% of men; ΔE 8.8 from the original
Deuteranopia#7786ADno green cones; the most common form, about 1% of men; ΔE 9.4 from the original
Tritanopia#4B9699no blue cones; rare, and affects men and women equally; ΔE 21.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.47:1WCAG large text: AA
Contrast with black, large text6.05:1WCAG large text: AAA

Named colours

Light slate grey · ΔE 10.6Slate grey · ΔE 11.9Steel blue · ΔE 12.1Cadetblue · ΔE 20.3Gray · ΔE 22.1Light steelblue · ΔE 22.3
Nearest named CSS colourLight slate grey (#778899)ΔE 10.6, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AE8666
Analogous#66AEAA, #666AAE
Triadic#AE668E, #8EAE66
Split complementary#AE666A, #AEAA66
Tetradic#AA66AE, #AE8666, #6AAE66

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EBF1F5
Lighter +30%#CAD8E3
Lighter +20%#A9BFD1
Lighter +10%#87A7C0
Darker −10%#4E7493
Darker −20%#3C5A72
Darker −30%#2B4050
Darker −40%#19252F
More saturated +25%#4991CB
Less saturated −25%#838B91

Channel breakdown

R102
G142
B174
Red102 (40%)
Green142 (55.7%)
Blue174 (68.2%)
Hue206.67°
Saturation (HSL)30.77%
Lightness54.12%
Dominant channelBlue
Hex per channelR 66 · G 8E · B AE

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