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Recognised as Colour

#40370B

  • #40370B
  • Yellow
  • Dark
  • Nearest: Dark olivegreen

#40370B is a yellow with RGB values 64, 55, 11 and HSL 50°, 71%, 15%. It is a dark colour, so white text on it reaches 11.9:1 contrast (AAA for normal text). The nearest named colour is Dark olivegreen.

Colour values

#40370B#40370B
HEX#40370B
RGBrgb(64, 55, 11)
RGB (0–1)0.251, 0.2157, 0.0431
RGB percentages25.1%, 21.6%, 4.3%
HSLhsl(49.8, 70.7%, 14.7%)
HSV / HSBhsv(49.8, 82.8%, 25.1%)
CMYK0%, 14.1%, 82.8%, 74.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,208,395
CSS custom property--colour: #40370B;

Brightness & contrast

Relative luminance0.03847WCAG 2.x, 0 is black and 1 is white
Perceived brightness54.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.87:1
Contrast with white11.87:1WCAG normal text: AAA
Contrast with black1.77:1WCAG normal text: Fail
Greyscale equivalent#363636
Inverted#BFC8F4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3D3505no red cones; affects about 1% of men; ΔE 1.8 from the original
Deuteranopia#40380Eno green cones; the most common form, about 1% of men; ΔE 1.2 from the original
Tritanopia#46322Eno blue cones; rare, and affects men and women equally; ΔE 23.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.87:1WCAG large text: AAA
Contrast with black, large text1.77:1WCAG large text: Fail

Named colours

Dark olivegreen · ΔE 25.8Dark slate grey · ΔE 33.7Saddle brown · ΔE 34.4Dim grey · ΔE 34.8Black · ΔE 36Sienna · ΔE 38.2
Nearest named CSS colourDark olivegreen (#556B2F)ΔE 25.77, a distinctly different colour
Hue familyyellow
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#0B1440
Analogous#401C0B, #2F400B
Triadic#0B4037, #370B40
Split complementary#0B2F40, #1C0B40
Tetradic#0B401C, #0B1440, #400B2F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DDC13A
Lighter +30%#C3A721
Lighter +20%#97821A
Lighter +10%#6C5C12
Darker −10%#141204
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#493D02
Less saturated −25%#373114

Channel breakdown

R64
G55
B11
Red64 (25.1%)
Green55 (21.6%)
Blue11 (4.3%)
Hue49.81°
Saturation (HSL)70.67%
Lightness14.71%
Dominant channelRed
Hex per channelR 40 · G 37 · B 0B

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Every value on this page was computed from “40370b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.