Colour

#AA0023

#AA0023
Red
Dark
Nearest: Firebrick

#AA0023 is a red with RGB values 170, 0, 35 and HSL 348°, 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

#AA0023#AA0023

HEX#AA0023

RGBrgb(170, 0, 35)

RGB (0–1)0.6667, 0, 0.1373

RGB percentages66.7%, 0%, 13.7%

HSLhsl(347.6, 100%, 33.3%)

HSV / HSBhsv(347.6, 100%, 66.7%)

CMYK0%, 100%, 79.4%, 33.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,141,155

CSS custom property--colour: #AA0023;

Brightness & contrast

Relative luminance0.08667WCAG 2.x, 0 is black and 1 is white

Perceived brightness93.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 7.68:1

Contrast with white7.68:1WCAG normal text: AAA

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

Greyscale equivalent#272727

Inverted#55FFDC

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#443E22no red cones; affects about 1% of men; ΔE 64.2 from the original

Deuteranopia#6A5F1Cno green cones; the most common form, about 1% of men; ΔE 64.2 from the original

Tritanopia#BC0014no blue cones; rare, and affects men and women equally; ΔE 14.2 from the original

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

Contrast with white, large text7.68:1WCAG large text: AAA

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

Named colours

Firebrick · ΔE 7.4 Brown · ΔE 10.5 Dark red · ΔE 14.3 Crimson · ΔE 16.2 Maroon · ΔE 16.2 Indian red · ΔE 25.7

Nearest named CSS colourFirebrick (#B22222)ΔE 7.36, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00AA87

Analogous#AA0078, #AA3200

Triadic#23AA00, #0023AA

Split complementary#00AA32, #0078AA

Tetradic#78AA00, #00AA87, #3200AA

Tints, shades & saturation

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

Lighter +40%#FF7793

Lighter +30%#FF446B

Lighter +20%#FF1142

Lighter +10%#DD002E

Darker −10%#770019

Darker −20%#44000E

Darker −30%#110003

Darker −40%#000000

More saturated +25%#AA0023

Less saturated −25%#951530

Channel breakdown

R170

B35

Red170 (66.7%)

Green0 (0%)

Blue35 (13.7%)

Hue347.65°

Saturation (HSL)100%

Lightness33.33%

Dominant channelRed

Hex per channelR AA · G 00 · B 23

Keep nerding

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#AA0023

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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