Recognised as Colour

#A31639

#A31639
Red
Dark
Nearest: Brown

#A31639 is a red with RGB values 163, 22, 57 and HSL 345°, 76%, 36%. It is a dark colour, so white text on it reaches 7.7:1 contrast (AAA for normal text). The nearest named colour is Brown.

Colour values

#A31639#A31639

HEX#A31639

RGBrgb(163, 22, 57)

RGB (0–1)0.6392, 0.0863, 0.2235

RGB percentages63.9%, 8.6%, 22.4%

HSLhsl(345.1, 76.2%, 36.3%)

HSV / HSBhsv(345.1, 86.5%, 63.9%)

CMYK0%, 86.5%, 65%, 36.1%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer10,688,057

CSS custom property--colour: #A31639;

Brightness & contrast

Relative luminance0.08656WCAG 2.x, 0 is black and 1 is white

Perceived brightness92.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 7.69:1

Contrast with white7.69:1WCAG normal text: AAA

Contrast with black2.73:1WCAG normal text: Fail

Greyscale equivalent#373737

Inverted#5CE9C6

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#434139no red cones; affects about 1% of men; ΔE 58.5 from the original

Deuteranopia#665D35no green cones; the most common form, about 1% of men; ΔE 58.7 from the original

Tritanopia#B30026no blue cones; rare, and affects men and women equally; ΔE 16.6 from the original

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

Contrast with white, large text7.69:1WCAG large text: AAA

Contrast with black, large text2.73:1WCAG large text: Fail

Named colours

Brown · ΔE 13.7 Firebrick · ΔE 19.7 Indian red · ΔE 21.4 Maroon · ΔE 23.3 Dark red · ΔE 24.5 Crimson · ΔE 24.6

Nearest named CSS colourBrown (#A52A2A)ΔE 13.73, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#16A380

Analogous#A31680, #A33916

Triadic#39A316, #1639A3

Split complementary#16A339, #1680A3

Tetradic#80A316, #16A380, #3916A3

Tints, shades & saturation

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

Lighter +40%#F194AB

Lighter +30%#EB6788

Lighter +20%#E43B65

Lighter +10%#D01C49

Darker −10%#761029

Darker −20%#490A1A

Darker −30%#1C040A

Darker −40%#000000

More saturated +25%#B9002E

Less saturated −25%#8C2D45

Channel breakdown

R163

G22

B57

Red163 (63.9%)

Green22 (8.6%)

Blue57 (22.4%)

Hue345.11°

Saturation (HSL)76.22%

Lightness36.27%

Dominant channelRed

Hex per channelR A3 · G 16 · B 39

Keep nerding

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

#A31639

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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