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Recognised as Colour

#57BDDF

  • #57BDDF
  • Cyan
  • Dark
  • Nearest: Sky blue

#57BDDF is a cyan with RGB values 87, 189, 223 and HSL 195°, 68%, 61%. It is a dark colour, so black text on it reaches 9.7:1 contrast (AAA for normal text). The nearest named colour is Sky blue.

Colour values

#57BDDF#57BDDF
HEX#57BDDF
RGBrgb(87, 189, 223)
RGB (0–1)0.3412, 0.7412, 0.8745
RGB percentages34.1%, 74.1%, 87.5%
HSLhsl(195, 68%, 60.8%)
HSV / HSBhsv(195, 61%, 87.5%)
CMYK61%, 15.2%, 0%, 12.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,750,239
CSS custom property--colour: #57BDDF;

Brightness & contrast

Relative luminance0.43749WCAG 2.x, 0 is black and 1 is white
Perceived brightness170 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.75:1
Contrast with white2.15:1WCAG normal text: Fail
Contrast with black9.75:1WCAG normal text: AAA
Greyscale equivalent#AAAAAA
Inverted#A84220

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#A9B9E1no red cones; affects about 1% of men; ΔE 23.4 from the original
Deuteranopia#96AADFno green cones; the most common form, about 1% of men; ΔE 25.4 from the original
Tritanopia#00C8C8no blue cones; rare, and affects men and women equally; ΔE 24.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.15:1WCAG large text: Fail
Contrast with black, large text9.75:1WCAG large text: AAA

Named colours

Sky blue · ΔE 9.8Light skyblue · ΔE 12Deep skyblue · ΔE 16.8Light blue · ΔE 20.6Cadetblue · ΔE 21.4Light steelblue · ΔE 22.2
Nearest named CSS colourSky blue (#87CEEB)ΔE 9.78, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DF7957
Analogous#57DFBD, #5779DF
Triadic#DF57BD, #BDDF57
Split complementary#DF5779, #DFBD57
Tetradic#BD57DF, #DF7957, #79DF57

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#D8EFF7
Lighter +20%#ADDFEF
Lighter +10%#82CEE7
Darker −10%#2CACD7
Darker −20%#218BAF
Darker −30%#196984
Darker −40%#114759
More saturated +25%#3ECAF8
Less saturated −25%#70B1C6

Channel breakdown

R87
G189
B223
Red87 (34.1%)
Green189 (74.1%)
Blue223 (87.5%)
Hue195°
Saturation (HSL)68%
Lightness60.78%
Dominant channelBlue
Hex per channelR 57 · G BD · B DF

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Every value on this page was computed from “57bddf” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.