Colour

#AA001B

#AA001B
Red
Dark
Nearest: Firebrick

#AA001B is a red with RGB values 170, 0, 27 and HSL 350°, 100%, 33%. It is a dark colour, so white text on it reaches 7.7:1 contrast (AAA for normal text). The nearest named colour is Firebrick.

Colour values

#AA001B#AA001B

HEX#AA001B

RGBrgb(170, 0, 27)

RGB (0–1)0.6667, 0, 0.1059

RGB percentages66.7%, 0%, 10.6%

HSLhsl(350.5, 100%, 33.3%)

HSV / HSBhsv(350.5, 100%, 66.7%)

CMYK0%, 100%, 84.1%, 33.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,141,147

CSS custom property--colour: #AA001B;

Brightness & contrast

Relative luminance0.08625WCAG 2.x, 0 is black and 1 is white

Perceived brightness93.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 7.71:1

Contrast with white7.71:1WCAG normal text: AAA

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

Greyscale equivalent#262626

Inverted#55FFE4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#453D19no red cones; affects about 1% of men; ΔE 63.8 from the original

Deuteranopia#6A5E12no green cones; the most common form, about 1% of men; ΔE 63.8 from the original

Tritanopia#BC0010no blue cones; rare, and affects men and women equally; ΔE 11.8 from the original

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

Contrast with white, large text7.71:1WCAG large text: AAA

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

Named colours

Firebrick · ΔE 5.3 Dark red · ΔE 11.9 Brown · ΔE 12.1 Maroon · ΔE 15.1 Crimson · ΔE 16.8 Indian red · ΔE 27.8

Nearest named CSS colourFirebrick (#B22222)ΔE 5.31, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00AA8F

Analogous#AA0070, #AA3A00

Triadic#1BAA00, #001BAA

Split complementary#00AA3A, #0070AA

Tetradic#70AA00, #00AA8F, #3A00AA

Tints, shades & saturation

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

Lighter +40%#FF778D

Lighter +30%#FF4462

Lighter +20%#FF1137

Lighter +10%#DD0023

Darker −10%#770013

Darker −20%#44000B

Darker −30%#110003

Darker −40%#000000

More saturated +25%#AA001B

Less saturated −25%#951529

Channel breakdown

R170

B27

Red170 (66.7%)

Green0 (0%)

Blue27 (10.6%)

Hue350.47°

Saturation (HSL)100%

Lightness33.33%

Dominant channelRed

Hex per channelR AA · G 00 · B 1B

Keep nerding

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#AA001B

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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