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Colour

#283B3F

  • #283B3F
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#283B3F is a cyan with RGB values 40, 59, 63 and HSL 190°, 22%, 20%. It is a dark colour, so white text on it reaches 11.7:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#283B3F#283B3F
HEX#283B3F
RGBrgb(40, 59, 63)
RGB (0–1)0.1569, 0.2314, 0.2471
RGB percentages15.7%, 23.1%, 24.7%
HSLhsl(190.4, 22.3%, 20.2%)
HSV / HSBhsv(190.4, 36.5%, 24.7%)
CMYK36.5%, 6.3%, 0%, 75.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,636,607
CSS custom property--colour: #283B3F;

Brightness & contrast

Relative luminance0.03938WCAG 2.x, 0 is black and 1 is white
Perceived brightness54.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.75:1
Contrast with white11.75:1WCAG normal text: AAA
Contrast with black1.79:1WCAG normal text: Fail
Greyscale equivalent#373737
Inverted#D7C4C0

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#383A3Fno red cones; affects about 1% of men; ΔE 7 from the original
Deuteranopia#34373Fno green cones; the most common form, about 1% of men; ΔE 7.2 from the original
Tritanopia#203D3Cno blue cones; rare, and affects men and women equally; ΔE 5.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.75:1WCAG large text: AAA
Contrast with black, large text1.79:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 9.5Dim grey · ΔE 22.5Black · ΔE 24.8Slate grey · ΔE 30.2Gray · ΔE 31.2Light slate grey · ΔE 33.3
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 9.51, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3F2C28
Analogous#283F37, #28303F
Triadic#3F283B, #3B3F28
Split complementary#3F2830, #3F3728
Tetradic#38283F, #3F2C28, #303F28

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#83A8B0
Lighter +30%#64929C
Lighter +20%#50757D
Lighter +10%#3C585E
Darker −10%#141E20
Darker −20%#000101
Darker −30%#000000
Darker −40%#000000
More saturated +25%#1B434C
Less saturated −25%#343434

Channel breakdown

R40
G59
B63
Red40 (15.7%)
Green59 (23.1%)
Blue63 (24.7%)
Hue190.43°
Saturation (HSL)22.33%
Lightness20.2%
Dominant channelBlue
Hex per channelR 28 · G 3B · B 3F

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Every value on this page was computed from “283b3f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.