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Recognised as Colour

#21CACF

  • #21CACF
  • Cyan
  • Dark
  • Nearest: Dark turquoise

#21CACF is a cyan with RGB values 33, 202, 207 and HSL 182°, 73%, 47%. It is a dark colour, so black text on it reaches 10.4:1 contrast (AAA for normal text). The nearest named colour is Dark turquoise.

Colour values

#21CACF#21CACF
HEX#21CACF
RGBrgb(33, 202, 207)
RGB (0–1)0.1294, 0.7922, 0.8118
RGB percentages12.9%, 79.2%, 81.2%
HSLhsl(181.7, 72.5%, 47.1%)
HSV / HSBhsv(181.7, 84.1%, 81.2%)
CMYK84.1%, 2.4%, 0%, 18.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,214,607
CSS custom property--colour: #21CACF;

Brightness & contrast

Relative luminance0.47069WCAG 2.x, 0 is black and 1 is white
Perceived brightness170.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 10.41:1
Contrast with white2.02:1WCAG normal text: Fail
Contrast with black10.41:1WCAG normal text: AAA
Greyscale equivalent#A6A6A6
Inverted#DE3530

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#BBC0D0no red cones; affects about 1% of men; ΔE 39.4 from the original
Deuteranopia#A4AFD0no green cones; the most common form, about 1% of men; ΔE 41 from the original
Tritanopia#00D1CBno blue cones; rare, and affects men and women equally; ΔE 7.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.02:1WCAG large text: Fail
Contrast with black, large text10.41:1WCAG large text: AAA

Named colours

Dark turquoise · ΔE 2.8Medium turquoise · ΔE 6.2Light seagreen · ΔE 11.4Turquoise · ΔE 13.9Aqua · ΔE 19.9Cyan · ΔE 19.9
Nearest named CSS colourDark turquoise (#00CED1)ΔE 2.81, a close match
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CF2621
Analogous#21CF7D, #2173CF
Triadic#CF21CA, #CACF21
Split complementary#CF2173, #CF7D21
Tetradic#7D21CF, #CF2621, #73CF21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C6F5F6
Lighter +30%#9AECEF
Lighter +20%#6EE4E8
Lighter +10%#42DCE1
Darker −10%#1A9FA3
Darker −20%#137477
Darker −30%#0C494B
Darker −40%#051E1F
More saturated +25%#03E6ED
Less saturated −25%#3FAEB1

Channel breakdown

R33
G202
B207
Red33 (12.9%)
Green202 (79.2%)
Blue207 (81.2%)
Hue181.72°
Saturation (HSL)72.5%
Lightness47.06%
Dominant channelBlue
Hex per channelR 21 · G CA · B CF

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Every value on this page was computed from “21cacf” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.