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Recognised as Colour

#AB4F37

  • #AB4F37
  • Red
  • Dark
  • Nearest: Sienna

#AB4F37 is a red with RGB values 171, 79, 55 and HSL 12°, 51%, 44%. It is a dark colour, so white text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Sienna.

Colour values

#AB4F37#AB4F37
HEX#AB4F37
RGBrgb(171, 79, 55)
RGB (0–1)0.6706, 0.3098, 0.2157
RGB percentages67.1%, 31%, 21.6%
HSLhsl(12.4, 51.3%, 44.3%)
HSV / HSBhsv(12.4, 67.8%, 67.1%)
CMYK0%, 53.8%, 67.8%, 32.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,226,935
CSS custom property--colour: #AB4F37;

Brightness & contrast

Relative luminance0.14526WCAG 2.x, 0 is black and 1 is white
Perceived brightness112.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.38:1
Contrast with white5.38:1WCAG normal text: AA
Contrast with black3.91:1WCAG normal text: Fail
Greyscale equivalent#616161
Inverted#54B0C8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#675E34no red cones; affects about 1% of men; ΔE 39.7 from the original
Deuteranopia#7E7235no green cones; the most common form, about 1% of men; ΔE 39.9 from the original
Tritanopia#BB3D4Ano blue cones; rare, and affects men and women equally; ΔE 18.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.38:1WCAG large text: AAA
Contrast with black, large text3.91:1WCAG large text: AA

Named colours

Sienna · ΔE 7.7Saddle brown · ΔE 15.1Indian red · ΔE 15.7Brown · ΔE 15.7Firebrick · ΔE 21.6Maroon · ΔE 23.7
Nearest named CSS colourSienna (#A0522D)ΔE 7.7, clearly different but related
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3793AB
Analogous#AB3759, #AB8937
Triadic#37AB4F, #4F37AB
Split complementary#37AB89, #3759AB
Tetradic#59AB37, #3793AB, #8937AB

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#ECCBC2
Lighter +30%#DFAA9C
Lighter +20%#D38975
Lighter +10%#C6674F
Darker −10%#843D2B
Darker −20%#5E2B1E
Darker −30%#371A12
Darker −40%#110805
More saturated +25%#C73E1B
Less saturated −25%#8F6053

Channel breakdown

R171
G79
B55
Red171 (67.1%)
Green79 (31%)
Blue55 (21.6%)
Hue12.41°
Saturation (HSL)51.33%
Lightness44.31%
Dominant channelRed
Hex per channelR AB · G 4F · B 37

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Every value on this page was computed from “ab4f37” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.