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Colour

#28283F

  • #28283F
  • Blue
  • Dark
  • Nearest: Black

#28283F is a blue with RGB values 40, 40, 63 and HSL 240°, 22%, 20%. It is a dark colour, so white text on it reaches 14.3:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#28283F#28283F
HEX#28283F
RGBrgb(40, 40, 63)
RGB (0–1)0.1569, 0.1569, 0.2471
RGB percentages15.7%, 15.7%, 24.7%
HSLhsl(240, 22.3%, 20.2%)
HSV / HSBhsv(240, 36.5%, 24.7%)
CMYK36.5%, 36.5%, 0%, 75.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,631,743
CSS custom property--colour: #28283F;

Brightness & contrast

Relative luminance0.02328WCAG 2.x, 0 is black and 1 is white
Perceived brightness43.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 14.33:1
Contrast with white14.33:1WCAG normal text: AAA
Contrast with black1.47:1WCAG normal text: Fail
Greyscale equivalent#2A2A2A
Inverted#D7D7C0

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#212B40no red cones; affects about 1% of men; ΔE 4.2 from the original
Deuteranopia#20293Eno green cones; the most common form, about 1% of men; ΔE 3.8 from the original
Tritanopia#222C30no blue cones; rare, and affects men and women equally; ΔE 14.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text14.33:1WCAG large text: AAA
Contrast with black, large text1.47:1WCAG large text: Fail

Named colours

Black · ΔE 23.4Dark slate grey · ΔE 25.5Dim grey · ΔE 31.6Dark slateblue · ΔE 36.4Slate grey · ΔE 37Gray · ΔE 39.8
Nearest named CSS colourBlack (#000000)ΔE 23.43, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3F3F28
Analogous#28343F, #34283F
Triadic#3F2828, #283F28
Split complementary#3F3428, #343F28
Tetradic#3F2834, #3F3F28, #283F34

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#8383B0
Lighter +30%#64649C
Lighter +20%#50507D
Lighter +10%#3C3C5E
Darker −10%#141420
Darker −20%#000001
Darker −30%#000000
Darker −40%#000000
More saturated +25%#1B1B4C
Less saturated −25%#343434

Channel breakdown

R40
G40
B63
Red40 (15.7%)
Green40 (15.7%)
Blue63 (24.7%)
Hue240°
Saturation (HSL)22.33%
Lightness20.2%
Dominant channelBlue
Hex per channelR 28 · G 28 · B 3F

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Every value on this page was computed from “28283f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.