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Recognised as Colour

#40BCD1

  • #40BCD1
  • Cyan
  • Dark
  • Nearest: Sky blue

#40BCD1 is a cyan with RGB values 64, 188, 209 and HSL 189°, 61%, 54%. It is a dark colour, so black text on it reaches 9.3:1 contrast (AAA for normal text). The nearest named colour is Sky blue.

Colour values

#40BCD1#40BCD1
HEX#40BCD1
RGBrgb(64, 188, 209)
RGB (0–1)0.251, 0.7373, 0.8196
RGB percentages25.1%, 73.7%, 82%
HSLhsl(188.7, 61.2%, 53.5%)
HSV / HSBhsv(188.7, 69.4%, 82%)
CMYK69.4%, 10%, 0%, 18%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,242,641
CSS custom property--colour: #40BCD1;

Brightness & contrast

Relative luminance0.4166WCAG 2.x, 0 is black and 1 is white
Perceived brightness164.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.33:1
Contrast with white2.25:1WCAG normal text: Fail
Contrast with black9.33:1WCAG normal text: AAA
Greyscale equivalent#A3A3A3
Inverted#BF432E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#ABB5D2no red cones; affects about 1% of men; ΔE 30.1 from the original
Deuteranopia#96A6D1no green cones; the most common form, about 1% of men; ΔE 31.4 from the original
Tritanopia#00C5C2no blue cones; rare, and affects men and women equally; ΔE 17 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.25:1WCAG large text: Fail
Contrast with black, large text9.33:1WCAG large text: AAA

Named colours

Sky blue · ΔE 14.9Dark turquoise · ΔE 15.5Medium turquoise · ΔE 17.1Cadetblue · ΔE 17.7Light seagreen · ΔE 18.3Light skyblue · ΔE 20.2
Nearest named CSS colourSky blue (#87CEEB)ΔE 14.93, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D15540
Analogous#40D19E, #4073D1
Triadic#D140BC, #BCD140
Split complementary#D14073, #D19E40
Tetradic#9E40D1, #D15540, #73D140

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E4F6F9
Lighter +30%#BBE7EF
Lighter +20%#92D9E5
Lighter +10%#69CADB
Darker −10%#2B9FB3
Darker −20%#217B8A
Darker −30%#175661
Darker −40%#0D3138
More saturated +25%#22D1EF
Less saturated −25%#5EA7B3

Channel breakdown

R64
G188
B209
Red64 (25.1%)
Green188 (73.7%)
Blue209 (82%)
Hue188.69°
Saturation (HSL)61.18%
Lightness53.53%
Dominant channelBlue
Hex per channelR 40 · G BC · B D1

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Every value on this page was computed from “40bcd1” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.