Recognised as Colour

#AD101F

#AD101F
Red
Dark
Nearest: Firebrick

#AD101F is a red with RGB values 173, 16, 31 and HSL 354°, 83%, 37%. It is a dark colour, so white text on it reaches 7.3:1 contrast (AAA for normal text). The nearest named colour is Firebrick.

Colour values

#AD101F#AD101F

HEX#AD101F

RGBrgb(173, 16, 31)

RGB (0–1)0.6784, 0.0627, 0.1216

RGB percentages67.8%, 6.3%, 12.2%

HSLhsl(354.3, 83.1%, 37.1%)

HSV / HSBhsv(354.3, 90.8%, 67.8%)

CMYK0%, 90.8%, 82.1%, 32.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,341,855

CSS custom property--colour: #AD101F;

Brightness & contrast

Relative luminance0.09354WCAG 2.x, 0 is black and 1 is white

Perceived brightness96 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 7.32:1

Contrast with white7.32:1WCAG normal text: AAA

Contrast with black2.87:1WCAG normal text: Fail

Greyscale equivalent#323232

Inverted#52EFE0

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#49411Dno red cones; affects about 1% of men; ΔE 62.6 from the original

Deuteranopia#6E6217no green cones; the most common form, about 1% of men; ΔE 62.8 from the original

Tritanopia#BF0019no blue cones; rare, and affects men and women equally; ΔE 10.4 from the original

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

Contrast with white, large text7.32:1WCAG large text: AAA

Contrast with black, large text2.87:1WCAG large text: Fail

Named colours

Firebrick · ΔE 3.6 Brown · ΔE 10.6 Dark red · ΔE 12.3 Maroon · ΔE 15.3 Crimson · ΔE 16.6 Indian red · ΔE 25.9

Nearest named CSS colourFirebrick (#B22222)ΔE 3.64, a close match

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#10AD9E

Analogous#AD106E, #AD4F10

Triadic#1FAD10, #101FAD

Split complementary#10AD4F, #106EAD

Tetradic#6EAD10, #10AD9E, #4F10AD

Tints, shades & saturation

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

Lighter +40%#F5949D

Lighter +30%#F16573

Lighter +20%#EC3748

Lighter +10%#DC1427

Darker −10%#7E0C17

Darker −20%#50070E

Darker −30%#210306

Darker −40%#000000

More saturated +25%#BD0012

Less saturated −25%#952832

Channel breakdown

R173

G16

B31

Red173 (67.8%)

Green16 (6.3%)

Blue31 (12.2%)

Hue354.27°

Saturation (HSL)83.07%

Lightness37.06%

Dominant channelRed

Hex per channelR AD · G 10 · B 1F

Keep nerding

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

#AD101F

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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