Colour

#B31A1E

#B31A1E
Red
Dark
Nearest: Firebrick

#B31A1E is a red with RGB values 179, 26, 30 and HSL 358°, 75%, 40%. It is a dark colour, so white text on it reaches 6.8:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#B31A1E#B31A1E

HEX#B31A1E

RGBrgb(179, 26, 30)

RGB (0–1)0.702, 0.102, 0.1176

RGB percentages70.2%, 10.2%, 11.8%

HSLhsl(358.4, 74.6%, 40.2%)

HSV / HSBhsv(358.4, 85.5%, 70.2%)

CMYK0%, 85.5%, 83.2%, 29.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,737,630

CSS custom property--colour: #B31A1E;

Brightness & contrast

Relative luminance0.10416WCAG 2.x, 0 is black and 1 is white

Perceived brightness100.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.81:1

Contrast with white6.81:1WCAG normal text: AA

Contrast with black3.08:1WCAG normal text: Fail

Greyscale equivalent#3B3B3B

Inverted#4CE5E1

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#4E461Cno red cones; affects about 1% of men; ΔE 62.9 from the original

Deuteranopia#736615no green cones; the most common form, about 1% of men; ΔE 62.5 from the original

Tritanopia#C6001Eno blue cones; rare, and affects men and women equally; ΔE 9.8 from the original

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

Contrast with white, large text6.81:1WCAG large text: AAA

Contrast with black, large text3.08:1WCAG large text: AA

Named colours

Firebrick · ΔE 2.8 Brown · ΔE 12.2 Dark red · ΔE 12.8 Crimson · ΔE 16.4 Maroon · ΔE 16.5 Tomato · ΔE 24.6

Nearest named CSS colourFirebrick (#B22222)ΔE 2.84, a close match

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1AB3AF

Analogous#B31A6A, #B3631A

Triadic#1EB31A, #1A1EB3

Split complementary#1AB363, #1A6AB3

Tetradic#6AB31A, #1AB3AF, #631AB3

Tints, shades & saturation

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

Lighter +40%#F2A7A9

Lighter +30%#EC7A7D

Lighter +20%#E54E52

Lighter +10%#DF2126

Darker −10%#861417

Darker −20%#5A0D0F

Darker −30%#2D0708

Darker −40%#010000

More saturated +25%#CD0006

Less saturated −25%#993436

Channel breakdown

R179

G26

B30

Red179 (70.2%)

Green26 (10.2%)

Blue30 (11.8%)

Hue358.43°

Saturation (HSL)74.63%

Lightness40.2%

Dominant channelRed

Hex per channelR B3 · G 1A · B 1E

Keep nerding

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

#B31A1E

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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