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Recognised as Colour

#40401B

  • #40401B
  • Yellow
  • Dark
  • Nearest: Dark olivegreen

#40401B is a yellow with RGB values 64, 64, 27 and HSL 60°, 41%, 18%. It is a dark colour, so white text on it reaches 10.7:1 contrast (AAA for normal text). The nearest named colour is Dark olivegreen.

Colour values

#40401B#40401B
HEX#40401B
RGBrgb(64, 64, 27)
RGB (0–1)0.251, 0.251, 0.1059
RGB percentages25.1%, 25.1%, 10.6%
HSLhsl(60, 40.7%, 17.8%)
HSV / HSBhsv(60, 57.8%, 25.1%)
CMYK0%, 0%, 57.8%, 74.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,210,715
CSS custom property--colour: #40401B;

Brightness & contrast

Relative luminance0.04836WCAG 2.x, 0 is black and 1 is white
Perceived brightness60.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.68:1
Contrast with white10.68:1WCAG normal text: AAA
Contrast with black1.97:1WCAG normal text: Fail
Greyscale equivalent#3D3D3D
Inverted#BFBFE4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#453D18no red cones; affects about 1% of men; ΔE 4.3 from the original
Deuteranopia#463F1Dno green cones; the most common form, about 1% of men; ΔE 3.9 from the original
Tritanopia#443C38no blue cones; rare, and affects men and women equally; ΔE 20.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.68:1WCAG large text: AAA
Contrast with black, large text1.97:1WCAG large text: Fail

Named colours

Dark olivegreen · ΔE 22Dark slate grey · ΔE 27.1Dim grey · ΔE 29.5Black · ΔE 35Gray · ΔE 35.8Saddle brown · ΔE 39.2
Nearest named CSS colourDark olivegreen (#556B2F)ΔE 21.98, a distinctly different colour
Hue familyyellow
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#1B1B40
Analogous#402E1B, #2E401B
Triadic#1B4040, #401B40
Split complementary#1B2E40, #2E1B40
Tetradic#1B402E, #1B1B40, #401B2E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BFBF68
Lighter +30%#ACAC48
Lighter +20%#888839
Lighter +10%#64642A
Darker −10%#1C1C0C
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#4B4B10
Less saturated −25%#353526

Channel breakdown

R64
G64
B27
Red64 (25.1%)
Green64 (25.1%)
Blue27 (10.6%)
Hue60°
Saturation (HSL)40.66%
Lightness17.84%
Dominant channelRed and Green
Hex per channelR 40 · G 40 · B 1B

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Every value on this page was computed from “40401b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.