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Recognised as Colour

#40400B

  • #40400B
  • Yellow
  • Dark
  • Nearest: Dark olivegreen

#40400B is a yellow with RGB values 64, 64, 11 and HSL 60°, 71%, 15%. 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

#40400B#40400B
HEX#40400B
RGBrgb(64, 64, 11)
RGB (0–1)0.251, 0.251, 0.0431
RGB percentages25.1%, 25.1%, 4.3%
HSLhsl(60, 70.7%, 14.7%)
HSV / HSBhsv(60, 82.8%, 25.1%)
CMYK0%, 0%, 82.8%, 74.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,210,699
CSS custom property--colour: #40400B;

Brightness & contrast

Relative luminance0.04781WCAG 2.x, 0 is black and 1 is white
Perceived brightness60.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.74:1
Contrast with white10.74:1WCAG normal text: AAA
Contrast with black1.96:1WCAG normal text: Fail
Greyscale equivalent#3C3C3C
Inverted#BFBFF4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#463D03no red cones; affects about 1% of men; ΔE 5.6 from the original
Deuteranopia#473F0Fno green cones; the most common form, about 1% of men; ΔE 4.6 from the original
Tritanopia#453B36no blue cones; rare, and affects men and women equally; ΔE 27.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.74:1WCAG large text: AAA
Contrast with black, large text1.96:1WCAG large text: Fail

Named colours

Dark olivegreen · ΔE 19.8Dark slate grey · ΔE 34.7Dim grey · ΔE 36.2Olive · ΔE 37.3Saddle brown · ΔE 37.3Dark green · ΔE 39.1
Nearest named CSS colourDark olivegreen (#556B2F)ΔE 19.75, a distinctly different colour
Hue familyyellow
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#0B0B40
Analogous#40260B, #26400B
Triadic#0B4040, #400B40
Split complementary#0B2640, #260B40
Tetradic#0B4026, #0B0B40, #400B26

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DDDD3A
Lighter +30%#C3C321
Lighter +20%#97971A
Lighter +10%#6C6C12
Darker −10%#141404
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#494902
Less saturated −25%#373714

Channel breakdown

R64
G64
B11
Red64 (25.1%)
Green64 (25.1%)
Blue11 (4.3%)
Hue60°
Saturation (HSL)70.67%
Lightness14.71%
Dominant channelRed and Green
Hex per channelR 40 · G 40 · B 0B

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Every value on this page was computed from “40400b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.