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Recognised as Colour

#668FE0

  • #668FE0
  • Blue
  • Dark
  • Nearest: Cornflower blue

#668FE0 is a blue with RGB values 102, 143, 224 and HSL 220°, 66%, 64%. It is a dark colour, so black text on it reaches 6.6:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#668FE0#668FE0
HEX#668FE0
RGBrgb(102, 143, 224)
RGB (0–1)0.4, 0.5608, 0.8784
RGB percentages40%, 56.1%, 87.8%
HSLhsl(219.8, 66.3%, 63.9%)
HSV / HSBhsv(219.8, 54.5%, 87.8%)
CMYK54.5%, 36.2%, 0%, 12.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,721,504
CSS custom property--colour: #668FE0;

Brightness & contrast

Relative luminance0.27852WCAG 2.x, 0 is black and 1 is white
Perceived brightness144.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.57:1
Contrast with white3.2:1WCAG normal text: Fail
Contrast with black6.57:1WCAG normal text: AA
Greyscale equivalent#8C8C8C
Inverted#99701F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6E96E3no red cones; affects about 1% of men; ΔE 3.6 from the original
Deuteranopia#5F8BDEno green cones; the most common form, about 1% of men; ΔE 2.1 from the original
Tritanopia#1DA1ADno blue cones; rare, and affects men and women equally; ΔE 48.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.2:1WCAG large text: AA
Contrast with black, large text6.57:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 4.4Dodgerblue · ΔE 17.9Steel blue · ΔE 20.1Medium purple · ΔE 28.5Royal blue · ΔE 28.7Deep skyblue · ΔE 29.8
Nearest named CSS colourCornflower blue (#6495ED)ΔE 4.36, a close match
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#E0B766
Analogous#66CCE0, #7A66E0
Triadic#E0668F, #8FE066
Split complementary#E07A66, #CCE066
Tetradic#E066CC, #E0B766, #66E07A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#E5ECFA
Lighter +20%#BBCDF1
Lighter +10%#90AEE9
Darker −10%#3C70D7
Darker −20%#2658BA
Darker −30%#1D4490
Darker −40%#153065
More saturated +25%#4F87F7
Less saturated −25%#7D97C9

Channel breakdown

R102
G143
B224
Red102 (40%)
Green143 (56.1%)
Blue224 (87.8%)
Hue219.84°
Saturation (HSL)66.3%
Lightness63.92%
Dominant channelBlue
Hex per channelR 66 · G 8F · B E0

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Every value on this page was computed from “668fe0” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.