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Recognised as Colour

#668EB8

  • #668EB8
  • Blue
  • Dark
  • Nearest: Steel blue

#668EB8 is a blue with RGB values 102, 142, 184 and HSL 211°, 37%, 56%. It is a dark colour, so black text on it reaches 6.1:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#668EB8#668EB8
HEX#668EB8
RGBrgb(102, 142, 184)
RGB (0–1)0.4, 0.5569, 0.7216
RGB percentages40%, 55.7%, 72.2%
HSLhsl(210.7, 36.6%, 56.1%)
HSV / HSBhsv(210.7, 44.6%, 72.2%)
CMYK44.6%, 22.8%, 0%, 27.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,721,208
CSS custom property--colour: #668EB8;

Brightness & contrast

Relative luminance0.25631WCAG 2.x, 0 is black and 1 is white
Perceived brightness137.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.13:1
Contrast with white3.43:1WCAG normal text: Fail
Contrast with black6.13:1WCAG normal text: AA
Greyscale equivalent#898989
Inverted#997147

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#7D8FBAno red cones; affects about 1% of men; ΔE 6.8 from the original
Deuteranopia#7387B7no green cones; the most common form, about 1% of men; ΔE 7.5 from the original
Tritanopia#45989Cno blue cones; rare, and affects men and women equally; ΔE 27 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.43:1WCAG large text: AA
Contrast with black, large text6.13:1WCAG large text: AAA

Named colours

Steel blue · ΔE 8.1Light slate grey · ΔE 15.3Slate grey · ΔE 16.4Light steelblue · ΔE 23.6Light skyblue · ΔE 23.7Sky blue · ΔE 25.3
Nearest named CSS colourSteel blue (#4682B4)ΔE 8.07, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B89066
Analogous#66B7B8, #6766B8
Triadic#B8668E, #8EB866
Split complementary#B86766, #B7B866
Tetradic#B866B7, #B89066, #66B867

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#F1F5F9
Lighter +30%#CFDBE8
Lighter +20%#ACC1D8
Lighter +10%#89A8C8
Darker −10%#4A74A1
Darker −20%#3A5B7E
Darker −30%#2A425B
Darker −40%#1A2938
More saturated +25%#4A8DD4
Less saturated −25%#828F9C

Channel breakdown

R102
G142
B184
Red102 (40%)
Green142 (55.7%)
Blue184 (72.2%)
Hue210.73°
Saturation (HSL)36.61%
Lightness56.08%
Dominant channelBlue
Hex per channelR 66 · G 8E · B B8

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Every value on this page was computed from “668eb8” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.