Recognised as Colour

#AA0018

#AA0018
Red
Dark
Nearest: Firebrick

#AA0018 is a red with RGB values 170, 0, 24 and HSL 352°, 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

#AA0018#AA0018

HEX#AA0018

RGBrgb(170, 0, 24)

RGB (0–1)0.6667, 0, 0.0941

RGB percentages66.7%, 0%, 9.4%

HSLhsl(351.5, 100%, 33.3%)

HSV / HSBhsv(351.5, 100%, 66.7%)

CMYK0%, 100%, 85.9%, 33.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,141,144

CSS custom property--colour: #AA0018;

Brightness & contrast

Relative luminance0.08612WCAG 2.x, 0 is black and 1 is white

Perceived brightness93.3 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 black2.72:1WCAG normal text: Fail

Greyscale equivalent#262626

Inverted#55FFE7

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#453D16no red cones; affects about 1% of men; ΔE 64 from the original

Deuteranopia#6A5E0Dno green cones; the most common form, about 1% of men; ΔE 63.9 from the original

Tritanopia#BC000Fno blue cones; rare, and affects men and women equally; ΔE 10.7 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 text2.72:1WCAG large text: Fail

Named colours

Firebrick · ΔE 5.4 Dark red · ΔE 11.3 Brown · ΔE 13.1 Maroon · ΔE 15 Crimson · ΔE 17.3 Tomato · ΔE 28.1

Nearest named CSS colourFirebrick (#B22222)ΔE 5.41, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00AA92

Analogous#AA006D, #AA3D00

Triadic#18AA00, #0018AA

Split complementary#00AA3D, #006DAA

Tetradic#6DAA00, #00AA92, #3D00AA

Tints, shades & saturation

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

Lighter +40%#FF778A

Lighter +30%#FF445E

Lighter +20%#FF1133

Lighter +10%#DD001F

Darker −10%#770011

Darker −20%#44000A

Darker −30%#110002

Darker −40%#000000

More saturated +25%#AA0018

Less saturated −25%#951527

Channel breakdown

R170

B24

Red170 (66.7%)

Green0 (0%)

Blue24 (9.4%)

Hue351.53°

Saturation (HSL)100%

Lightness33.33%

Dominant channelRed

Hex per channelR AA · G 00 · B 18

Keep nerding

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

#AA0018

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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