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Colour

#28474E

  • #28474E
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#28474E is a cyan with RGB values 40, 71, 78 and HSL 191°, 32%, 23%. It is a dark colour, so white text on it reaches 10:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#28474E#28474E
HEX#28474E
RGBrgb(40, 71, 78)
RGB (0–1)0.1569, 0.2784, 0.3059
RGB percentages15.7%, 27.8%, 30.6%
HSLhsl(191.1, 32.2%, 23.1%)
HSV / HSBhsv(191.1, 48.7%, 30.6%)
CMYK48.7%, 9%, 0%, 69.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,639,694
CSS custom property--colour: #28474E;

Brightness & contrast

Relative luminance0.05508WCAG 2.x, 0 is black and 1 is white
Perceived brightness64.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.99:1
Contrast with white9.99:1WCAG normal text: AAA
Contrast with black2.1:1WCAG normal text: Fail
Greyscale equivalent#414141
Inverted#D7B8B1

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#42454Eno red cones; affects about 1% of men; ΔE 10.5 from the original
Deuteranopia#3C404Eno green cones; the most common form, about 1% of men; ΔE 11.3 from the original
Tritanopia#164A49no blue cones; rare, and affects men and women equally; ΔE 8.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.99:1WCAG large text: AAA
Contrast with black, large text2.1:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 5.7Dim grey · ΔE 20.3Slate grey · ΔE 25.9Teal · ΔE 28.1Gray · ΔE 28.2Light slate grey · ΔE 28.9
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 5.66, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#4E2F28
Analogous#284E42, #28344E
Triadic#4E2847, #474E28
Split complementary#4E2834, #4E4228
Tetradic#42284E, #4E2F28, #344E28

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#83B4BF
Lighter +30%#61A0AE
Lighter +20%#4B8491
Lighter +10%#396670
Darker −10%#17282C
Darker −20%#050A0B
Darker −30%#000000
Darker −40%#000000
More saturated +25%#19505D
Less saturated −25%#373E3F

Channel breakdown

R40
G71
B78
Red40 (15.7%)
Green71 (27.8%)
Blue78 (30.6%)
Hue191.05°
Saturation (HSL)32.2%
Lightness23.14%
Dominant channelBlue
Hex per channelR 28 · G 47 · B 4E

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Every value on this page was computed from “28474e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.