Recognised as Colour

#A1171D

#A1171D
Red
Dark
Nearest: Firebrick

#A1171D is a red with RGB values 161, 23, 29 and HSL 357°, 75%, 36%. It is a dark colour, so white text on it reaches 7.9:1 contrast (AAA for normal text). The nearest named colour is Firebrick.

Colour values

#A1171D#A1171D

HEX#A1171D

RGBrgb(161, 23, 29)

RGB (0–1)0.6314, 0.0902, 0.1137

RGB percentages63.1%, 9%, 11.4%

HSLhsl(357.4, 75%, 36.1%)

HSV / HSBhsv(357.4, 85.7%, 63.1%)

CMYK0%, 85.7%, 82%, 36.9%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer10,557,213

CSS custom property--colour: #A1171D;

Brightness & contrast

Relative luminance0.08279WCAG 2.x, 0 is black and 1 is white

Perceived brightness90.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 7.91:1

Contrast with white7.91:1WCAG normal text: AAA

Contrast with black2.66:1WCAG normal text: Fail

Greyscale equivalent#353535

Inverted#5EE8E2

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#463E1Bno red cones; affects about 1% of men; ΔE 57.5 from the original

Deuteranopia#675C16no green cones; the most common form, about 1% of men; ΔE 58 from the original

Tritanopia#B2001Cno blue cones; rare, and affects men and women equally; ΔE 9.3 from the original

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

Contrast with white, large text7.91:1WCAG large text: AAA

Contrast with black, large text2.66:1WCAG large text: Fail

Named colours

Firebrick · ΔE 5.9 Brown · ΔE 6.5 Dark red · ΔE 9.6 Maroon · ΔE 11.1 Crimson · ΔE 21.4 Indian red · ΔE 24.3

Nearest named CSS colourFirebrick (#B22222)ΔE 5.86, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#17A19B

Analogous#A11762, #A15617

Triadic#1DA117, #171DA1

Split complementary#17A156, #1762A1

Tetradic#62A117, #17A19B, #5617A1

Tints, shades & saturation

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

Lighter +40%#F09498

Lighter +30%#E9686D

Lighter +20%#E33B42

Lighter +10%#CE1D25

Darker −10%#741115

Darker −20%#480A0D

Darker −30%#1B0405

Darker −40%#000000

More saturated +25%#B80008

Less saturated −25%#8A2E32

Channel breakdown

R161

G23

B29

Red161 (63.1%)

Green23 (9%)

Blue29 (11.4%)

Hue357.39°

Saturation (HSL)75%

Lightness36.08%

Dominant channelRed

Hex per channelR A1 · G 17 · B 1D

Keep nerding

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

#A1171D

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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