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Recognised as Colour

#285D57

  • #285D57
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#285D57 is a cyan with RGB values 40, 93, 87 and HSL 173°, 40%, 26%. It is a dark colour, so white text on it reaches 7.5:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#285D57#285D57
HEX#285D57
RGBrgb(40, 93, 87)
RGB (0–1)0.1569, 0.3647, 0.3412
RGB percentages15.7%, 36.5%, 34.1%
HSLhsl(173.2, 39.8%, 26.1%)
HSV / HSBhsv(173.2, 57%, 36.5%)
CMYK57%, 0%, 6.5%, 63.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,645,335
CSS custom property--colour: #285D57;

Brightness & contrast

Relative luminance0.08968WCAG 2.x, 0 is black and 1 is white
Perceived brightness80.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.52:1
Contrast with white7.52:1WCAG normal text: AAA
Contrast with black2.79:1WCAG normal text: Fail
Greyscale equivalent#515151
Inverted#D7A2A8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#595857no red cones; affects about 1% of men; ΔE 19.7 from the original
Deuteranopia#505258no green cones; the most common form, about 1% of men; ΔE 19.9 from the original
Tritanopia#045F5Bno blue cones; rare, and affects men and women equally; ΔE 5.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.52:1WCAG large text: AAA
Contrast with black, large text2.79:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 9Teal · ΔE 17Dark cyan · ΔE 21.1Dim grey · ΔE 21.1Slate grey · ΔE 25.6Cadetblue · ΔE 25.8
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 9.03, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#5D282E
Analogous#285D3D, #28495D
Triadic#57285D, #5D5728
Split complementary#5D2849, #5D3D28
Tetradic#3C285D, #5D282E, #485D28

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#86CBC3
Lighter +30%#62BCB2
Lighter +20%#47A49A
Lighter +10%#378178
Darker −10%#193936
Darker −20%#091614
Darker −30%#000000
Darker −40%#000000
More saturated +25%#176E64
Less saturated −25%#394C4A

Channel breakdown

R40
G93
B87
Red40 (15.7%)
Green93 (36.5%)
Blue87 (34.1%)
Hue173.21°
Saturation (HSL)39.85%
Lightness26.08%
Dominant channelGreen
Hex per channelR 28 · G 5D · B 57

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Every value on this page was computed from “285d57” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.