Recognised as Colour

#AD0403

#AD0403
Red
Dark
Nearest: Firebrick

#AD0403 is a red with RGB values 173, 4, 3 and HSL 0°, 97%, 35%. 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

#AD0403#AD0403

HEX#AD0403

RGBrgb(173, 4, 3)

RGB (0–1)0.6784, 0.0157, 0.0118

RGB percentages67.8%, 1.6%, 1.2%

HSLhsl(0.4, 96.6%, 34.5%)

HSV / HSBhsv(0.4, 98.3%, 67.8%)

CMYK0%, 97.7%, 98.3%, 32.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,338,755

CSS custom property--colour: #AD0403;

Brightness & contrast

Relative luminance0.08978WCAG 2.x, 0 is black and 1 is white

Perceived brightness94.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 7.51:1

Contrast with white7.51:1WCAG normal text: AAA

Contrast with black2.8:1WCAG normal text: Fail

Greyscale equivalent#282828

Inverted#52FBFC

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#483E00no red cones; affects about 1% of men; ΔE 64.2 from the original

Deuteranopia#6D6000no green cones; the most common form, about 1% of men; ΔE 63.7 from the original

Tritanopia#C0000Ano blue cones; rare, and affects men and women equally; ΔE 6.9 from the original

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

Contrast with white, large text7.51:1WCAG large text: AAA

Contrast with black, large text2.8:1WCAG large text: Fail

Named colours

Firebrick · ΔE 12.3 Dark red · ΔE 13.9 Maroon · ΔE 18.9 Brown · ΔE 20.9 Crimson · ΔE 22.2 Tomato · ΔE 26.4

Nearest named CSS colourFirebrick (#B22222)ΔE 12.28, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#03ACAD

Analogous#AD0357, #AD5903

Triadic#03AD04, #0403AD

Split complementary#03AD59, #0357AD

Tetradic#57AD03, #03ACAD, #5903AD

Tints, shades & saturation

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

Lighter +40%#FD807F

Lighter +30%#FC4E4D

Lighter +20%#FB1C1B

Lighter +10%#DF0504

Darker −10%#7B0302

Darker −20%#490201

Darker −30%#170100

Darker −40%#000000

More saturated +25%#B00100

Less saturated −25%#971A19

Channel breakdown

R173

Red173 (67.8%)

Green4 (1.6%)

Blue3 (1.2%)

Hue0.35°

Saturation (HSL)96.59%

Lightness34.51%

Dominant channelRed

Hex per channelR AD · G 04 · B 03

Keep nerding

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

#AD0403

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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