Colour

#B81C00

#B81C00
Red
Dark
Nearest: Firebrick

#B81C00 is a red with RGB values 184, 28, 0 and HSL 9°, 100%, 36%. It is a dark colour, so white text on it reaches 6.6:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#B81C00#B81C00

HEX#B81C00

RGBrgb(184, 28, 0)

RGB (0–1)0.7216, 0.1098, 0

RGB percentages72.2%, 11%, 0%

HSLhsl(9.1, 100%, 36.1%)

HSV / HSBhsv(9.1, 100%, 72.2%)

CMYK0%, 84.8%, 100%, 27.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer12,065,792

CSS custom property--colour: #B81C00;

Brightness & contrast

Relative luminance0.11021WCAG 2.x, 0 is black and 1 is white

Perceived brightness102.9 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.55:1

Contrast with white6.55:1WCAG normal text: AA

Contrast with black3.2:1WCAG normal text: Fail

Greyscale equivalent#3B3B3B

Inverted#47E3FF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#524800no red cones; affects about 1% of men; ΔE 64.3 from the original

Deuteranopia#776900no green cones; the most common form, about 1% of men; ΔE 63.2 from the original

Tritanopia#CC001Ano blue cones; rare, and affects men and women equally; ΔE 11.6 from the original

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

Contrast with white, large text6.55:1WCAG large text: AAA

Contrast with black, large text3.2:1WCAG large text: AA

Named colours

Firebrick · ΔE 15.7 Dark red · ΔE 18.2 Maroon · ΔE 23.2 Tomato · ΔE 23.6 Crimson · ΔE 24.3 Brown · ΔE 24.4

Nearest named CSS colourFirebrick (#B22222)ΔE 15.71, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#009CB8

Analogous#B80040, #B87800

Triadic#00B81C, #1C00B8

Split complementary#00B878, #0040B8

Tetradic#40B800, #009CB8, #7800B8

Tints, shades & saturation

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

Lighter +40%#FF9885

Lighter +30%#FF6C52

Lighter +20%#FF411F

Lighter +10%#EB2400

Darker −10%#851400

Darker −20%#520C00

Darker −30%#1F0500

Darker −40%#000000

More saturated +25%#B81C00

Less saturated −25%#A12C17

Channel breakdown

R184

G28

Red184 (72.2%)

Green28 (11%)

Blue0 (0%)

Hue9.13°

Saturation (HSL)100%

Lightness36.08%

Dominant channelRed

Hex per channelR B8 · G 1C · B 00

Keep nerding

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

#B81C00

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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