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Recognised as Colour

#427E8F

  • #427E8F
  • Cyan
  • Dark
  • Nearest: Slate grey

#427E8F is a cyan with RGB values 66, 126, 143 and HSL 193°, 37%, 41%. It is a dark colour, so black text on it reaches 4.6:1 contrast (AA for normal text). The nearest named colour is Slate grey.

Colour values

#427E8F#427E8F
HEX#427E8F
RGBrgb(66, 126, 143)
RGB (0–1)0.2588, 0.4941, 0.5608
RGB percentages25.9%, 49.4%, 56.1%
HSLhsl(193.2, 36.8%, 41%)
HSV / HSBhsv(193.2, 53.8%, 56.1%)
CMYK53.8%, 11.9%, 0%, 43.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,357,775
CSS custom property--colour: #427E8F;

Brightness & contrast

Relative luminance0.18063WCAG 2.x, 0 is black and 1 is white
Perceived brightness113.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.61:1
Contrast with white4.55:1WCAG normal text: AA
Contrast with black4.61:1WCAG normal text: AA
Greyscale equivalent#727272
Inverted#BD8170

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#737B90no red cones; affects about 1% of men; ΔE 16.6 from the original
Deuteranopia#67728Fno green cones; the most common form, about 1% of men; ΔE 17.5 from the original
Tritanopia#0B8483no blue cones; rare, and affects men and women equally; ΔE 16.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.55:1WCAG large text: AAA
Contrast with black, large text4.61:1WCAG large text: AAA

Named colours

Slate grey · ΔE 13.6Light slate grey · ΔE 14.4Cadetblue · ΔE 14.9Teal · ΔE 15.9Dark cyan · ΔE 17.5Steel blue · ΔE 20.1
Nearest named CSS colourSlate grey (#708090)ΔE 13.55, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8F5342
Analogous#428F7A, #42578F
Triadic#8F427E, #7E8F42
Split complementary#8F4257, #8F7A42
Tetradic#7A428F, #8F5342, #578F42

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BDD8E0
Lighter +30%#9AC4D0
Lighter +20%#77B0C0
Lighter +10%#549CB0
Darker −10%#325F6C
Darker −20%#224149
Darker −30%#122226
Darker −40%#020303
More saturated +25%#288DA9
Less saturated −25%#5C6F75

Channel breakdown

R66
G126
B143
Red66 (25.9%)
Green126 (49.4%)
Blue143 (56.1%)
Hue193.25°
Saturation (HSL)36.84%
Lightness40.98%
Dominant channelBlue
Hex per channelR 42 · G 7E · B 8F

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Every value on this page was computed from “427e8f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.