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Colour

#283D3D

  • #283D3D
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#283D3D is a cyan with RGB values 40, 61, 61 and HSL 180°, 21%, 20%. It is a dark colour, so white text on it reaches 11.5:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#283D3D#283D3D
HEX#283D3D
RGBrgb(40, 61, 61)
RGB (0–1)0.1569, 0.2392, 0.2392
RGB percentages15.7%, 23.9%, 23.9%
HSLhsl(180, 20.8%, 19.8%)
HSV / HSBhsv(180, 34.4%, 23.9%)
CMYK34.4%, 0%, 0%, 76.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,637,117
CSS custom property--colour: #283D3D;

Brightness & contrast

Relative luminance0.04126WCAG 2.x, 0 is black and 1 is white
Perceived brightness55.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.51:1
Contrast with white11.51:1WCAG normal text: AAA
Contrast with black1.83:1WCAG normal text: Fail
Greyscale equivalent#393939
Inverted#D7C2C2

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3A3B3Dno red cones; affects about 1% of men; ΔE 8.4 from the original
Deuteranopia#36383Dno green cones; the most common form, about 1% of men; ΔE 8.7 from the original
Tritanopia#203E3Dno blue cones; rare, and affects men and women equally; ΔE 3.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.51:1WCAG large text: AAA
Contrast with black, large text1.83:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 8Dim grey · ΔE 22.1Black · ΔE 25.6Slate grey · ΔE 30.4Gray · ΔE 30.8Teal · ΔE 32.3
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 8.04, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3D2828
Analogous#283D33, #28333D
Triadic#3D283D, #3D3D28
Split complementary#3D2833, #3D3328
Tetradic#33283D, #3D2828, #333D28

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#83AEAE
Lighter +30%#659999
Lighter +20%#507B7B
Lighter +10%#3C5C5C
Darker −10%#141E1E
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#1B4A4A
Less saturated −25%#333333

Channel breakdown

R40
G61
B61
Red40 (15.7%)
Green61 (23.9%)
Blue61 (23.9%)
Hue180°
Saturation (HSL)20.79%
Lightness19.8%
Dominant channelGreen and Blue
Hex per channelR 28 · G 3D · B 3D

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Every value on this page was computed from “283d3d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.