Colour

#E40021

#E40021
Red
Dark
Nearest: Crimson

#E40021 is a red with RGB values 228, 0, 33 and HSL 351°, 100%, 45%. It is a dark colour, so white text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#E40021#E40021

HEX#E40021

RGBrgb(228, 0, 33)

RGB (0–1)0.8941, 0, 0.1294

RGB percentages89.4%, 0%, 12.9%

HSLhsl(351.3, 100%, 44.7%)

HSV / HSBhsv(351.3, 100%, 89.4%)

CMYK0%, 100%, 85.5%, 10.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer14,942,241

CSS custom property--colour: #E40021;

Brightness & contrast

Relative luminance0.16604WCAG 2.x, 0 is black and 1 is white

Perceived brightness125.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 4.86:1

Contrast with white4.86:1WCAG normal text: AA

Contrast with black4.32:1WCAG normal text: Fail

Greyscale equivalent#333333

Inverted#1BFFDE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#5F551Eno red cones; affects about 1% of men; ΔE 80.1 from the original

Deuteranopia#918111no green cones; the most common form, about 1% of men; ΔE 79.6 from the original

Tritanopia#FC0017no blue cones; rare, and affects men and women equally; ΔE 12.7 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text4.86:1WCAG large text: AAA

Contrast with black, large text4.32:1WCAG large text: AA

Named colours

Crimson · ΔE 16.6 Red · ΔE 19.1 Tomato · ΔE 21.9 Orange red · ΔE 22.3 Firebrick · ΔE 23.5 Dark red · ΔE 31.5

Nearest named CSS colourCrimson (#DC143C)ΔE 16.6, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00E4C3

Analogous#E40093, #E45100

Triadic#21E400, #0021E4

Split complementary#00E451, #0093E4

Tetradic#93E400, #00E4C3, #5100E4

Tints, shades & saturation

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

Lighter +40%#FFB1BC

Lighter +30%#FF7E91

Lighter +20%#FF4B65

Lighter +10%#FF1839

Darker −10%#B1001A

Darker −20%#7E0012

Darker −30%#4B000B

Darker −40%#180003

More saturated +25%#E40021

Less saturated −25%#C81C35

Channel breakdown

R228

B33

Red228 (89.4%)

Green0 (0%)

Blue33 (12.9%)

Hue351.32°

Saturation (HSL)100%

Lightness44.71%

Dominant channelRed

Hex per channelR E4 · G 00 · B 21

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#E40021

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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