Recognised as Colour

#AD021F

#AD021F
Red
Dark
Nearest: Firebrick

#AD021F is a red with RGB values 173, 2, 31 and HSL 350°, 98%, 34%. It is a dark colour, so white text on it reaches 7.5:1 contrast (AAA for normal text). The nearest named colour is Firebrick.

Colour values

#AD021F#AD021F

HEX#AD021F

RGBrgb(173, 2, 31)

RGB (0–1)0.6784, 0.0078, 0.1216

RGB percentages67.8%, 0.8%, 12.2%

HSLhsl(349.8, 97.7%, 34.3%)

HSV / HSBhsv(349.8, 98.8%, 67.8%)

CMYK0%, 98.8%, 82.1%, 32.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,338,271

CSS custom property--colour: #AD021F;

Brightness & contrast

Relative luminance0.09027WCAG 2.x, 0 is black and 1 is white

Perceived brightness95.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 7.49:1

Contrast with white7.49:1WCAG normal text: AAA

Contrast with black2.81:1WCAG normal text: Fail

Greyscale equivalent#282828

Inverted#52FDE0

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#463F1Eno red cones; affects about 1% of men; ΔE 64.8 from the original

Deuteranopia#6C6017no green cones; the most common form, about 1% of men; ΔE 64.4 from the original

Tritanopia#BF0013no blue cones; rare, and affects men and women equally; ΔE 12.5 from the original

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

Contrast with white, large text7.49:1WCAG large text: AAA

Contrast with black, large text2.81:1WCAG large text: Fail

Named colours

Firebrick · ΔE 5.5 Brown · ΔE 11.9 Dark red · ΔE 13.3 Crimson · ΔE 15.6 Maroon · ΔE 16.2 Indian red · ΔE 27

Nearest named CSS colourFirebrick (#B22222)ΔE 5.51, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#02AD90

Analogous#AD0274, #AD3A02

Triadic#1FAD02, #021FAD

Split complementary#02AD3B, #0274AD

Tetradic#75AD02, #02AD90, #3B02AD

Tints, shades & saturation

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

Lighter +40%#FE7D93

Lighter +30%#FD4B69

Lighter +20%#FC193F

Lighter +10%#DF0328

Darker −10%#7B0116

Darker −20%#48010D

Darker −30%#160004

Darker −40%#000000

More saturated +25%#AF001E

Less saturated −25%#97182D

Channel breakdown

R173

B31

Red173 (67.8%)

Green2 (0.8%)

Blue31 (12.2%)

Hue349.82°

Saturation (HSL)97.71%

Lightness34.31%

Dominant channelRed

Hex per channelR AD · G 02 · B 1F

Keep nerding

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

#AD021F

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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