Colour

#E21F00

#E21F00
Red
Dark
Nearest: Orange red

#E21F00 is a red with RGB values 226, 31, 0 and HSL 8°, 100%, 44%. It is a dark colour, so white text on it reaches 4.7:1 contrast (AA for normal text). The nearest named colour is Orange red.

Colour values

#E21F00#E21F00

HEX#E21F00

RGBrgb(226, 31, 0)

RGB (0–1)0.8863, 0.1216, 0

RGB percentages88.6%, 12.2%, 0%

HSLhsl(8.2, 100%, 44.3%)

HSV / HSBhsv(8.2, 100%, 88.6%)

CMYK0%, 86.3%, 100%, 11.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer14,819,072

CSS custom property--colour: #E21F00;

Brightness & contrast

Relative luminance0.17149WCAG 2.x, 0 is black and 1 is white

Perceived brightness125.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 4.74:1

Contrast with white4.74:1WCAG normal text: AA

Contrast with black4.43:1WCAG normal text: Fail

Greyscale equivalent#464646

Inverted#1DE0FF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#655800no red cones; affects about 1% of men; ΔE 75.6 from the original

Deuteranopia#938200no green cones; the most common form, about 1% of men; ΔE 74.9 from the original

Tritanopia#FA001Eno blue cones; rare, and affects men and women equally; ΔE 11.5 from the original

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

Contrast with white, large text4.74:1WCAG large text: AAA

Contrast with black, large text4.43:1WCAG large text: AA

Named colours

Orange red · ΔE 11.7 Red · ΔE 12.8 Tomato · ΔE 23.7 Crimson · ΔE 28.3 Firebrick · ΔE 29.2 Chocolate · ΔE 33.7

Nearest named CSS colourOrange red (#FF4500)ΔE 11.73, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00C3E2

Analogous#E20052, #E29000

Triadic#00E21F, #1F00E2

Split complementary#00E290, #0052E2

Tetradic#52E200, #00C3E2, #9000E2

Tints, shades & saturation

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

Lighter +40%#FFBAAF

Lighter +30%#FF8E7C

Lighter +20%#FF6249

Lighter +10%#FF3616

Darker −10%#AF1800

Darker −20%#7C1100

Darker −30%#490A00

Darker −40%#160300

More saturated +25%#E21F00

Less saturated −25%#C6331C

Channel breakdown

R226

G31

Red226 (88.6%)

Green31 (12.2%)

Blue0 (0%)

Hue8.23°

Saturation (HSL)100%

Lightness44.31%

Dominant channelRed

Hex per channelR E2 · G 1F · B 00

Keep nerding

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

#E21F00

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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