Recognised as Colour

#AC371E

#AC371E
Red
Dark
Nearest: Firebrick

#AC371E is a red with RGB values 172, 55, 30 and HSL 11°, 70%, 40%. It is a dark colour, so white text on it reaches 6.3:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#AC371E#AC371E

HEX#AC371E

RGBrgb(172, 55, 30)

RGB (0–1)0.6745, 0.2157, 0.1176

RGB percentages67.5%, 21.6%, 11.8%

HSLhsl(10.6, 70.3%, 39.6%)

HSV / HSBhsv(10.6, 82.6%, 67.5%)

CMYK0%, 68%, 82.6%, 32.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,286,302

CSS custom property--colour: #AC371E;

Brightness & contrast

Relative luminance0.11597WCAG 2.x, 0 is black and 1 is white

Perceived brightness103.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.33:1

Contrast with white6.33:1WCAG normal text: AA

Contrast with black3.32:1WCAG normal text: Fail

Greyscale equivalent#4E4E4E

Inverted#53C8E1

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#594F1Ano red cones; affects about 1% of men; ΔE 50.8 from the original

Deuteranopia#766918no green cones; the most common form, about 1% of men; ΔE 51 from the original

Tritanopia#BE1032no blue cones; rare, and affects men and women equally; ΔE 19.9 from the original

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

Contrast with white, large text6.33:1WCAG large text: AAA

Contrast with black, large text3.32:1WCAG large text: AA

Named colours

Firebrick · ΔE 10 Brown · ΔE 11.2 Dark red · ΔE 13.3 Maroon · ΔE 15.4 Sienna · ΔE 18.2 Saddle brown · ΔE 20.3

Nearest named CSS colourFirebrick (#B22222)ΔE 10.01, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1E93AC

Analogous#AC1E4C, #AC7E1E

Triadic#1EAC37, #371EAC

Split complementary#1EAC7E, #1E4CAC

Tetradic#4CAC1E, #1E93AC, #7E1EAC

Tints, shades & saturation

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

Lighter +40%#F0B3A6

Lighter +30%#E88E7B

Lighter +20%#E06950

Lighter +10%#D74526

Darker −10%#812916

Darker −20%#551B0F

Darker −30%#2A0D07

Darker −40%#000000

More saturated +25%#C52705

Less saturated −25%#934737

Channel breakdown

R172

G55

B30

Red172 (67.5%)

Green55 (21.6%)

Blue30 (11.8%)

Hue10.56°

Saturation (HSL)70.3%

Lightness39.61%

Dominant channelRed

Hex per channelR AC · G 37 · B 1E

Keep nerding

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

#AC371E

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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