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Recognised as Colour

#644F28

  • #644F28
  • Orange
  • Dark
  • Nearest: Dark olivegreen

#644F28 is a orange with RGB values 100, 79, 40 and HSL 39°, 43%, 27%. It is a dark colour, so white text on it reaches 7.8:1 contrast (AAA for normal text). The nearest named colour is Dark olivegreen.

Colour values

#644F28#644F28
HEX#644F28
RGBrgb(100, 79, 40)
RGB (0–1)0.3922, 0.3098, 0.1569
RGB percentages39.2%, 31%, 15.7%
HSLhsl(39, 42.9%, 27.5%)
HSV / HSBhsv(39, 60%, 39.2%)
CMYK0%, 21%, 60%, 60.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,573,864
CSS custom property--colour: #644F28;

Brightness & contrast

Relative luminance0.08454WCAG 2.x, 0 is black and 1 is white
Perceived brightness82.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.8:1
Contrast with white7.8:1WCAG normal text: AAA
Contrast with black2.69:1WCAG normal text: Fail
Greyscale equivalent#515151
Inverted#9BB0D7

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#584F24no red cones; affects about 1% of men; ΔE 6.3 from the original
Deuteranopia#5D5429no green cones; the most common form, about 1% of men; ΔE 6.4 from the original
Tritanopia#6C4946no blue cones; rare, and affects men and women equally; ΔE 21.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.8:1WCAG large text: AAA
Contrast with black, large text2.69:1WCAG large text: Fail

Named colours

Dark olivegreen · ΔE 24Saddle brown · ΔE 27.4Dim grey · ΔE 28Sienna · ΔE 28.9Gray · ΔE 32.3Dark slate grey · ΔE 33.7
Nearest named CSS colourDark olivegreen (#556B2F)ΔE 23.99, a distinctly different colour
Hue familyorange
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#283D64
Analogous#643128, #5B6428
Triadic#28644F, #4F2864
Split complementary#285B64, #312864
Tetradic#286431, #283D64, #64285B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D0B788
Lighter +30%#C1A064
Lighter +20%#AD8945
Lighter +10%#886C37
Darker −10%#403219
Darker −20%#1B150B
Darker −30%#000000
Darker −40%#000000
More saturated +25%#765416
Less saturated −25%#534A3A

Channel breakdown

R100
G79
B40
Red100 (39.2%)
Green79 (31%)
Blue40 (15.7%)
Hue39°
Saturation (HSL)42.86%
Lightness27.45%
Dominant channelRed
Hex per channelR 64 · G 4F · B 28

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Every value on this page was computed from “644f28” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.