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Recognised as Colour

#581C00

  • #581C00
  • Orange
  • Dark
  • Nearest: Saddle brown

#581C00 is a orange with RGB values 88, 28, 0 and HSL 19°, 100%, 17%. It is a dark colour, so white text on it reaches 13.3:1 contrast (AAA for normal text). The nearest named colour is Saddle brown.

Colour values

#581C00#581C00
HEX#581C00
RGBrgb(88, 28, 0)
RGB (0–1)0.3451, 0.1098, 0
RGB percentages34.5%, 11%, 0%
HSLhsl(19.1, 100%, 17.3%)
HSV / HSBhsv(19.1, 100%, 34.5%)
CMYK0%, 68.2%, 100%, 65.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,774,336
CSS custom property--colour: #581C00;

Brightness & contrast

Relative luminance0.02905WCAG 2.x, 0 is black and 1 is white
Perceived brightness52.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.28:1
Contrast with white13.28:1WCAG normal text: AAA
Contrast with black1.58:1WCAG normal text: Fail
Greyscale equivalent#272727
Inverted#A7E3FF

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2E2700no red cones; affects about 1% of men; ΔE 29.2 from the original
Deuteranopia#3C3500no green cones; the most common form, about 1% of men; ΔE 29.8 from the original
Tritanopia#620A17no blue cones; rare, and affects men and women equally; ΔE 15.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text13.28:1WCAG large text: AAA
Contrast with black, large text1.58:1WCAG large text: Fail

Named colours

Saddle brown · ΔE 21.3Maroon · ΔE 24.1Sienna · ΔE 25.1Dark red · ΔE 28.7Brown · ΔE 29.4Firebrick · ΔE 36.4
Nearest named CSS colourSaddle brown (#8B4513)ΔE 21.34, a distinctly different colour
Hue familyorange
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#003C58
Analogous#580010, #584800
Triadic#00581C, #1C0058
Split complementary#005848, #001058
Tetradic#105800, #003C58, #480058

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FF6A25
Lighter +30%#F14D00
Lighter +20%#BE3C00
Lighter +10%#8B2C00
Darker −10%#250C00
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#581C00
Less saturated −25%#4D200B

Channel breakdown

R88
G28
B0
Red88 (34.5%)
Green28 (11%)
Blue0 (0%)
Hue19.09°
Saturation (HSL)100%
Lightness17.25%
Dominant channelRed
Hex per channelR 58 · G 1C · B 00

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Every value on this page was computed from “581c00” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.