Colour

#E01B00

#E01B00
Red
Dark
Nearest: Orange red

#E01B00 is a red with RGB values 224, 27, 0 and HSL 7°, 100%, 44%. It is a dark colour, so white text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Orange red.

Colour values

#E01B00#E01B00

HEX#E01B00

RGBrgb(224, 27, 0)

RGB (0–1)0.8784, 0.1059, 0

RGB percentages87.8%, 10.6%, 0%

HSLhsl(7.2, 100%, 43.9%)

HSV / HSBhsv(7.2, 100%, 87.8%)

CMYK0%, 87.9%, 100%, 12.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer14,686,976

CSS custom property--colour: #E01B00;

Brightness & contrast

Relative luminance0.16631WCAG 2.x, 0 is black and 1 is white

Perceived brightness124.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 4.85:1

Contrast with white4.85:1WCAG normal text: AA

Contrast with black4.33:1WCAG normal text: Fail

Greyscale equivalent#434343

Inverted#1FE4FF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#635600no red cones; affects about 1% of men; ΔE 75.7 from the original

Deuteranopia#918000no green cones; the most common form, about 1% of men; ΔE 74.9 from the original

Tritanopia#F8001Bno blue cones; rare, and affects men and women equally; ΔE 10.5 from the original

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

Contrast with white, large text4.85:1WCAG large text: AAA

Contrast with black, large text4.33:1WCAG large text: AA

Named colours

Orange red · ΔE 12.6 Red · ΔE 13.1 Tomato · ΔE 23.9 Crimson · ΔE 27.7 Firebrick · ΔE 28.7 Dark red · ΔE 33.7

Nearest named CSS colourOrange red (#FF4500)ΔE 12.57, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00C5E0

Analogous#E00055, #E08B00

Triadic#00E01B, #1B00E0

Split complementary#00E08B, #0055E0

Tetradic#55E000, #00C5E0, #8B00E0

Tints, shades & saturation

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

Lighter +40%#FFB7AD

Lighter +30%#FF8A7A

Lighter +20%#FF5D47

Lighter +10%#FF3014

Darker −10%#AD1500

Darker −20%#7A0F00

Darker −30%#470900

Darker −40%#140200

More saturated +25%#E01B00

Less saturated −25%#C4301C

Channel breakdown

R224

G27

Red224 (87.8%)

Green27 (10.6%)

Blue0 (0%)

Hue7.23°

Saturation (HSL)100%

Lightness43.92%

Dominant channelRed

Hex per channelR E0 · G 1B · B 00

Keep nerding

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

#E01B00

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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