Colour

#4287D0

#4287D0
Blue
Dark
Nearest: Cornflower blue

#4287D0 is a blue with RGB values 66, 135, 208 and HSL 211°, 60%, 54%. It is a dark colour, so black text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#4287D0#4287D0

HEX#4287D0

RGBrgb(66, 135, 208)

RGB (0–1)0.2588, 0.5294, 0.8157

RGB percentages25.9%, 52.9%, 81.6%

HSLhsl(210.8, 60.2%, 53.7%)

HSV / HSBhsv(210.8, 68.3%, 81.6%)

CMYK68.3%, 35.1%, 0%, 18.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer4,360,144

CSS custom property--colour: #4287D0;

Brightness & contrast

Relative luminance0.2304WCAG 2.x, 0 is black and 1 is white

Perceived brightness130.1 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.61:1

Contrast with white3.74:1WCAG normal text: Fail

Contrast with black5.61:1WCAG normal text: AA

Greyscale equivalent#7E7E7E

Inverted#BD782F

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#668BD3no red cones; affects about 1% of men; ΔE 7 from the original

Deuteranopia#527ECFno green cones; the most common form, about 1% of men; ΔE 8.5 from the original

Tritanopia#0098A2no blue cones; rare, and affects men and women equally; ΔE 42.8 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text3.74:1WCAG large text: AA

Contrast with black, large text5.61:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 11.4 Steel blue · ΔE 13.5 Dodgerblue · ΔE 21.5 Deep skyblue · ΔE 26.2 Light skyblue · ΔE 31.7 Light slate grey · ΔE 33.1

Nearest named CSS colourCornflower blue (#6495ED)ΔE 11.44, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#D08B42

Analogous#42CED0, #4442D0

Triadic#D04287, #87D042

Split complementary#D04442, #CED042

Tetradic#D042CE, #D08B42, #42D044

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#E5EFF9

Lighter +30%#BDD5EE

Lighter +20%#94BBE4

Lighter +10%#6BA1DA

Darker −10%#2C6EB3

Darker −20%#22558A

Darker −30%#183B61

Darker −40%#0E2238

More saturated +25%#2586EE

Less saturated −25%#6088B3

Channel breakdown

R66

G135

B208

Red66 (25.9%)

Green135 (52.9%)

Blue208 (81.6%)

Hue210.85°

Saturation (HSL)60.17%

Lightness53.73%

Dominant channelBlue

Hex per channelR 42 · G 87 · B D0

Keep nerding

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#4287D0

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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