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Recognised as Colour

#657F81

  • #657F81
  • Cyan
  • Dark
  • Nearest: Slate grey

#657F81 is a cyan with RGB values 101, 127, 129 and HSL 184°, 12%, 45%. It is a dark colour, so black text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Slate grey.

Colour values

#657F81#657F81
HEX#657F81
RGBrgb(101, 127, 129)
RGB (0–1)0.3961, 0.498, 0.5059
RGB percentages39.6%, 49.8%, 50.6%
HSLhsl(184.3, 12.2%, 45.1%)
HSV / HSBhsv(184.3, 21.7%, 50.6%)
CMYK21.7%, 1.6%, 0%, 49.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,651,777
CSS custom property--colour: #657F81;

Brightness & contrast

Relative luminance0.1953WCAG 2.x, 0 is black and 1 is white
Perceived brightness120.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.91:1
Contrast with white4.28:1WCAG normal text: Fail
Contrast with black4.91:1WCAG normal text: AA
Greyscale equivalent#7A7A7A
Inverted#9A807E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#7B7D81no red cones; affects about 1% of men; ΔE 9.1 from the original
Deuteranopia#767981no green cones; the most common form, about 1% of men; ΔE 9.4 from the original
Tritanopia#5C8180no blue cones; rare, and affects men and women equally; ΔE 4.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.28:1WCAG large text: AA
Contrast with black, large text4.91:1WCAG large text: AAA

Named colours

Slate grey · ΔE 9.4Gray · ΔE 10Light slate grey · ΔE 10.6Dim grey · ΔE 12Cadetblue · ΔE 15Dark slate grey · ΔE 20.3
Nearest named CSS colourSlate grey (#708090)ΔE 9.38, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#816765
Analogous#658175, #657181
Triadic#81657F, #7F8165
Split complementary#816571, #817565
Tetradic#756581, #816765, #718165

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D4DDDE
Lighter +30%#B8C6C7
Lighter +20%#9BAFB1
Lighter +10%#7F989A
Darker −10%#4F6364
Darker −20%#384748
Darker −30%#222B2B
Darker −40%#0B0E0F
More saturated +25%#48989E
Less saturated −25%#737373

Channel breakdown

R101
G127
B129
Red101 (39.6%)
Green127 (49.8%)
Blue129 (50.6%)
Hue184.29°
Saturation (HSL)12.17%
Lightness45.1%
Dominant channelBlue
Hex per channelR 65 · G 7F · B 81

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Every value on this page was computed from “657f81” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.