Recognised as Colour

#A8151F

#A8151F
Red
Dark
Nearest: Firebrick

#A8151F is a red with RGB values 168, 21, 31 and HSL 356°, 78%, 37%. It is a dark colour, so white text on it reaches 7.5:1 contrast (AAA for normal text). The nearest named colour is Firebrick.

Colour values

#A8151F#A8151F

HEX#A8151F

RGBrgb(168, 21, 31)

RGB (0–1)0.6588, 0.0824, 0.1216

RGB percentages65.9%, 8.2%, 12.2%

HSLhsl(355.9, 77.8%, 37.1%)

HSV / HSBhsv(355.9, 87.5%, 65.9%)

CMYK0%, 87.5%, 81.5%, 34.1%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,015,455

CSS custom property--colour: #A8151F;

Brightness & contrast

Relative luminance0.0896WCAG 2.x, 0 is black and 1 is white

Perceived brightness93.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 7.52:1

Contrast with white7.52:1WCAG normal text: AAA

Contrast with black2.79:1WCAG normal text: Fail

Greyscale equivalent#353535

Inverted#57EAE0

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#48411Dno red cones; affects about 1% of men; ΔE 60.6 from the original

Deuteranopia#6B5F18no green cones; the most common form, about 1% of men; ΔE 60.1 from the original

Tritanopia#BA001Bno blue cones; rare, and affects men and women equally; ΔE 10.2 from the original

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

Contrast with white, large text7.52:1WCAG large text: AAA

Contrast with black, large text2.79:1WCAG large text: Fail

Named colours

Firebrick · ΔE 3.9 Brown · ΔE 8.2 Dark red · ΔE 11 Maroon · ΔE 13.4 Crimson · ΔE 18.6 Indian red · ΔE 24.7

Nearest named CSS colourFirebrick (#B22222)ΔE 3.89, a close match

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#15A89E

Analogous#A81568, #A85515

Triadic#1FA815, #151FA8

Split complementary#15A855, #1568A8

Tetradic#68A815, #15A89E, #5515A8

Tints, shades & saturation

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

Lighter +40%#F2979D

Lighter +30%#EC6A73

Lighter +20%#E73C48

Lighter +10%#D51B27

Darker −10%#7B0F17

Darker −20%#4D0A0E

Darker −30%#200406

Darker −40%#000000

More saturated +25%#BD000D

Less saturated −25%#902D33

Channel breakdown

R168

G21

B31

Red168 (65.9%)

Green21 (8.2%)

Blue31 (12.2%)

Hue355.92°

Saturation (HSL)77.78%

Lightness37.06%

Dominant channelRed

Hex per channelR A8 · G 15 · B 1F

Keep nerding

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

#A8151F

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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