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Recognised as Colour

#A53D18

  • #A53D18
  • Orange
  • Dark
  • Nearest: Sienna

#A53D18 is a orange with RGB values 165, 61, 24 and HSL 16°, 75%, 37%. It is a dark colour, so white text on it reaches 6.4:1 contrast (AA for normal text). The nearest named colour is Sienna.

Colour values

#A53D18#A53D18
HEX#A53D18
RGBrgb(165, 61, 24)
RGB (0–1)0.6471, 0.2392, 0.0941
RGB percentages64.7%, 23.9%, 9.4%
HSLhsl(15.7, 74.6%, 37.1%)
HSV / HSBhsv(15.7, 85.5%, 64.7%)
CMYK0%, 63%, 85.5%, 35.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer10,829,080
CSS custom property--colour: #A53D18;

Brightness & contrast

Relative luminance0.11403WCAG 2.x, 0 is black and 1 is white
Perceived brightness101.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.4:1
Contrast with white6.4:1WCAG normal text: AA
Contrast with black3.28:1WCAG normal text: Fail
Greyscale equivalent#505050
Inverted#5AC2E7

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5B5012no red cones; affects about 1% of men; ΔE 45.2 from the original
Deuteranopia#756813no green cones; the most common form, about 1% of men; ΔE 45.7 from the original
Tritanopia#B62136no blue cones; rare, and affects men and women equally; ΔE 23.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.4:1WCAG large text: AAA
Contrast with black, large text3.28:1WCAG large text: AA

Named colours

Sienna · ΔE 14.4Saddle brown · ΔE 15.1Brown · ΔE 15.3Firebrick · ΔE 15.7Dark red · ΔE 15.7Maroon · ΔE 17
Nearest named CSS colourSienna (#A0522D)ΔE 14.35, a distinctly different colour
Hue familyorange
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#1880A5
Analogous#A5183A, #A58418
Triadic#18A53D, #3D18A5
Split complementary#18A583, #183AA5
Tetradic#39A518, #1880A5, #8318A5

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#F0B099
Lighter +30%#EA8D6C
Lighter +20%#E36B40
Lighter +10%#D24D1E
Darker −10%#782D12
Darker −20%#4C1C0B
Darker −30%#1F0C05
Darker −40%#000000
More saturated +25%#BD3200
Less saturated −25%#8D4830

Channel breakdown

R165
G61
B24
Red165 (64.7%)
Green61 (23.9%)
Blue24 (9.4%)
Hue15.74°
Saturation (HSL)74.6%
Lightness37.06%
Dominant channelRed
Hex per channelR A5 · G 3D · B 18

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Every value on this page was computed from “a53d18” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.