Recognised as Colour

#AD0303

#AD0303
Red
Dark
Nearest: Firebrick

#AD0303 is a red with RGB values 173, 3, 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

#AD0303#AD0303

HEX#AD0303

RGBrgb(173, 3, 3)

RGB (0–1)0.6784, 0.0118, 0.0118

RGB percentages67.8%, 1.2%, 1.2%

HSLhsl(0, 96.6%, 34.5%)

HSV / HSBhsv(0, 98.3%, 67.8%)

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

24-bit integer11,338,499

CSS custom property--colour: #AD0303;

Brightness & contrast

Relative luminance0.08956WCAG 2.x, 0 is black and 1 is white

Perceived brightness94.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 7.52:1

Contrast with white7.52:1WCAG normal text: AAA

Contrast with black2.79:1WCAG normal text: Fail

Greyscale equivalent#272727

Inverted#52FCFC

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#483E00no red cones; affects about 1% of men; ΔE 64.3 from the original

Deuteranopia#6D6000no green cones; the most common form, about 1% of men; ΔE 63.9 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 text7.52:1WCAG large text: AAA

Contrast with black, large text2.79:1WCAG large text: Fail

Named colours

Firebrick · ΔE 12.3 Dark red · ΔE 13.9 Maroon · ΔE 18.9 Brown · ΔE 20.9 Crimson · ΔE 22.1 Tomato · ΔE 26.5

Nearest named CSS colourFirebrick (#B22222)ΔE 12.3, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#03ADAD

Analogous#AD0358, #AD5803

Triadic#03AD03, #0303AD

Split complementary#03AD58, #0358AD

Tetradic#58AD03, #03ADAD, #5803AD

Tints, shades & saturation

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

Lighter +40%#FD7F7F

Lighter +30%#FC4D4D

Lighter +20%#FB1B1B

Lighter +10%#DF0404

Darker −10%#7B0202

Darker −20%#490101

Darker −30%#170000

Darker −40%#000000

More saturated +25%#B00000

Less saturated −25%#971919

Channel breakdown

R173

Red173 (67.8%)

Green3 (1.2%)

Blue3 (1.2%)

Hue0°

Saturation (HSL)96.59%

Lightness34.51%

Dominant channelRed

Hex per channelR AD · G 03 · B 03

Keep nerding

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

#AD0303

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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