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Recognised as Colour

#42CED5

  • #42CED5
  • Cyan
  • Light
  • Nearest: Dark turquoise

#42CED5 is a cyan with RGB values 66, 206, 213 and HSL 183°, 64%, 55%. It is a light colour, so black text on it reaches 11:1 contrast (AAA for normal text). The nearest named colour is Dark turquoise.

Colour values

#42CED5#42CED5
HEX#42CED5
RGBrgb(66, 206, 213)
RGB (0–1)0.2588, 0.8078, 0.8353
RGB percentages25.9%, 80.8%, 83.5%
HSLhsl(182.9, 63.6%, 54.7%)
HSV / HSBhsv(182.9, 69%, 83.5%)
CMYK69%, 3.3%, 0%, 16.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,378,325
CSS custom property--colour: #42CED5;

Brightness & contrast

Relative luminance0.50105WCAG 2.x, 0 is black and 1 is white
Perceived brightness177.2 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 11.02:1
Contrast with white1.91:1WCAG normal text: Fail
Contrast with black11.02:1WCAG normal text: AAA
Greyscale equivalent#B1B1B1
Inverted#BD312A

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#BFC5D6no red cones; affects about 1% of men; ΔE 36.1 from the original
Deuteranopia#AAB5D6no green cones; the most common form, about 1% of men; ΔE 37.7 from the original
Tritanopia#00D5D0no blue cones; rare, and affects men and women equally; ΔE 10.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text1.91:1WCAG large text: Fail
Contrast with black, large text11.02:1WCAG large text: AAA

Named colours

Dark turquoise · ΔE 5.9Medium turquoise · ΔE 6.8Light seagreen · ΔE 13.5Turquoise · ΔE 15.1Aqua · ΔE 20.4Cyan · ΔE 20.4
Nearest named CSS colourDark turquoise (#00CED1)ΔE 5.89, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D54942
Analogous#42D593, #4284D5
Triadic#D542CE, #CED542
Split complementary#D54284, #D59242
Tetradic#9342D5, #D54942, #85D542

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E9F9FA
Lighter +30%#BFEEF1
Lighter +20%#95E4E8
Lighter +10%#6CD9DE
Darker −10%#29B4BB
Darker −20%#208B91
Darker −30%#176367
Darker −40%#0E3B3D
More saturated +25%#25E8F2
Less saturated −25%#5FB4B8

Channel breakdown

R66
G206
B213
Red66 (25.9%)
Green206 (80.8%)
Blue213 (83.5%)
Hue182.86°
Saturation (HSL)63.64%
Lightness54.71%
Dominant channelBlue
Hex per channelR 42 · G CE · B D5

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Every value on this page was computed from “42ced5” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.