Colour

#AA000B

#AA000B
Red
Dark
Nearest: Firebrick

#AA000B is a red with RGB values 170, 0, 11 and HSL 356°, 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

#AA000B#AA000B

HEX#AA000B

RGBrgb(170, 0, 11)

RGB (0–1)0.6667, 0, 0.0431

RGB percentages66.7%, 0%, 4.3%

HSLhsl(356.1, 100%, 33.3%)

HSV / HSBhsv(356.1, 100%, 66.7%)

CMYK0%, 100%, 93.5%, 33.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,141,131

CSS custom property--colour: #AA000B;

Brightness & contrast

Relative luminance0.0857WCAG 2.x, 0 is black and 1 is white

Perceived brightness93 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 7.74:1

Contrast with white7.74:1WCAG normal text: AAA

Contrast with black2.71:1WCAG normal text: Fail

Greyscale equivalent#252525

Inverted#55FFF4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#463D06no red cones; affects about 1% of men; ΔE 63.9 from the original

Deuteranopia#6B5E00no green cones; the most common form, about 1% of men; ΔE 63.4 from the original

Tritanopia#BC000Ano blue cones; rare, and affects men and women equally; ΔE 7.7 from the original

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

Contrast with white, large text7.74:1WCAG large text: AAA

Contrast with black, large text2.71:1WCAG large text: Fail

Named colours

Firebrick · ΔE 9 Dark red · ΔE 11.5 Maroon · ΔE 16.3 Brown · ΔE 17.5 Crimson · ΔE 20.2 Tomato · ΔE 27.1

Nearest named CSS colourFirebrick (#B22222)ΔE 9, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00AA9F

Analogous#AA0060, #AA4A00

Triadic#0BAA00, #000BAA

Split complementary#00AA4A, #0060AA

Tetradic#60AA00, #00AA9F, #4A00AA

Tints, shades & saturation

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

Lighter +40%#FF7780

Lighter +30%#FF4450

Lighter +20%#FF1120

Lighter +10%#DD000E

Darker −10%#770008

Darker −20%#440004

Darker −30%#110001

Darker −40%#000000

More saturated +25%#AA000B

Less saturated −25%#95151D

Channel breakdown

R170

B11

Red170 (66.7%)

Green0 (0%)

Blue11 (4.3%)

Hue356.12°

Saturation (HSL)100%

Lightness33.33%

Dominant channelRed

Hex per channelR AA · G 00 · B 0B

Keep nerding

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#AA000B

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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