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Recognised as Colour

#577F87

  • #577F87
  • Cyan
  • Dark
  • Nearest: Slate grey

#577F87 is a cyan with RGB values 87, 127, 135 and HSL 190°, 22%, 44%. It is a dark colour, so black text on it reaches 4.8:1 contrast (AA for normal text). The nearest named colour is Slate grey.

Colour values

#577F87#577F87
HEX#577F87
RGBrgb(87, 127, 135)
RGB (0–1)0.3412, 0.498, 0.5294
RGB percentages34.1%, 49.8%, 52.9%
HSLhsl(190, 21.6%, 43.5%)
HSV / HSBhsv(190, 35.6%, 52.9%)
CMYK35.6%, 5.9%, 0%, 47.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,734,279
CSS custom property--colour: #577F87;

Brightness & contrast

Relative luminance0.18954WCAG 2.x, 0 is black and 1 is white
Perceived brightness117.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.79:1
Contrast with white4.38:1WCAG normal text: Fail
Contrast with black4.79:1WCAG normal text: AA
Greyscale equivalent#777777
Inverted#A88078

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#787C88no red cones; affects about 1% of men; ΔE 13 from the original
Deuteranopia#707687no green cones; the most common form, about 1% of men; ΔE 13.4 from the original
Tritanopia#458381no blue cones; rare, and affects men and women equally; ΔE 9.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.38:1WCAG large text: AA
Contrast with black, large text4.79:1WCAG large text: AAA

Named colours

Slate grey · ΔE 10Light slate grey · ΔE 11.1Cadetblue · ΔE 13.2Gray · ΔE 15Dim grey · ΔE 15.9Teal · ΔE 17.3
Nearest named CSS colourSlate grey (#708090)ΔE 10.03, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#875F57
Analogous#578777, #576787
Triadic#87577F, #7F8757
Split complementary#875767, #877757
Tetradic#775787, #875F57, #678757

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CCDBDE
Lighter +30%#ADC5CA
Lighter +20%#8EAFB6
Lighter +10%#6F9AA2
Darker −10%#436268
Darker −20%#2F4549
Darker −30%#1B272A
Darker −40%#070A0B
More saturated +25%#3B92A3
Less saturated −25%#6F6F6F

Channel breakdown

R87
G127
B135
Red87 (34.1%)
Green127 (49.8%)
Blue135 (52.9%)
Hue190°
Saturation (HSL)21.62%
Lightness43.53%
Dominant channelBlue
Hex per channelR 57 · G 7F · B 87

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Every value on this page was computed from “577f87” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.