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Recognised as Colour

#283C40

  • #283C40
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#283C40 is a cyan with RGB values 40, 60, 64 and HSL 190°, 23%, 20%. It is a dark colour, so white text on it reaches 11.6:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#283C40#283C40
HEX#283C40
RGBrgb(40, 60, 64)
RGB (0–1)0.1569, 0.2353, 0.251
RGB percentages15.7%, 23.5%, 25.1%
HSLhsl(190, 23.1%, 20.4%)
HSV / HSBhsv(190, 37.5%, 25.1%)
CMYK37.5%, 6.2%, 0%, 74.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,636,864
CSS custom property--colour: #283C40;

Brightness & contrast

Relative luminance0.04053WCAG 2.x, 0 is black and 1 is white
Perceived brightness55.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.6:1
Contrast with white11.6:1WCAG normal text: AAA
Contrast with black1.81:1WCAG normal text: Fail
Greyscale equivalent#383838
Inverted#D7C3BF

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#393B40no red cones; affects about 1% of men; ΔE 7.4 from the original
Deuteranopia#353740no green cones; the most common form, about 1% of men; ΔE 8.2 from the original
Tritanopia#1F3E3Dno blue cones; rare, and affects men and women equally; ΔE 5.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.6:1WCAG large text: AAA
Contrast with black, large text1.81:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 9Dim grey · ΔE 22.2Black · ΔE 25.3Slate grey · ΔE 29.9Gray · ΔE 30.9Light slate grey · ΔE 33
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 9.02, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#402C28
Analogous#284038, #283040
Triadic#40283C, #3C4028
Split complementary#402830, #403828
Tetradic#382840, #402C28, #304028

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#83AAB1
Lighter +30%#63949E
Lighter +20%#4F777F
Lighter +10%#3C595F
Darker −10%#141F21
Darker −20%#010101
Darker −30%#000000
Darker −40%#000000
More saturated +25%#1B454D
Less saturated −25%#343434

Channel breakdown

R40
G60
B64
Red40 (15.7%)
Green60 (23.5%)
Blue64 (25.1%)
Hue190°
Saturation (HSL)23.08%
Lightness20.39%
Dominant channelBlue
Hex per channelR 28 · G 3C · B 40

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Every value on this page was computed from “283c40” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.