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Recognised as Colour

#21C774

  • #21C774
  • Cyan
  • Dark
  • Nearest: Medium seagreen

#21C774 is a cyan with RGB values 33, 199, 116 and HSL 150°, 72%, 45%. It is a dark colour, so black text on it reaches 9.5:1 contrast (AAA for normal text). The nearest named colour is Medium seagreen.

Colour values

#21C774#21C774
HEX#21C774
RGBrgb(33, 199, 116)
RGB (0–1)0.1294, 0.7804, 0.4549
RGB percentages12.9%, 78%, 45.5%
HSLhsl(150, 71.6%, 45.5%)
HSV / HSBhsv(150, 83.4%, 78%)
CMYK83.4%, 0%, 41.7%, 22%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,213,748
CSS custom property--colour: #21C774;

Brightness & contrast

Relative luminance0.42431WCAG 2.x, 0 is black and 1 is white
Perceived brightness158.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.49:1
Contrast with white2.21:1WCAG normal text: Fail
Contrast with black9.49:1WCAG normal text: AAA
Greyscale equivalent#9E9E9E
Inverted#DE388B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#C6B66Eno red cones; affects about 1% of men; ΔE 55.2 from the original
Deuteranopia#B4A97Ano green cones; the most common form, about 1% of men; ΔE 55.7 from the original
Tritanopia#00C5B3no blue cones; rare, and affects men and women equally; ΔE 35.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.21:1WCAG large text: Fail
Contrast with black, large text9.49:1WCAG large text: AAA

Named colours

Medium seagreen · ΔE 13.6Medium spring green · ΔE 20.2Light green · ΔE 20.9Pale green · ΔE 23.7Forest green · ΔE 26.9Sea green · ΔE 29.3
Nearest named CSS colourMedium seagreen (#3CB371)ΔE 13.58, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#C72174
Analogous#21C721, #21C7C7
Triadic#7421C7, #C77421
Split complementary#C721C7, #C72121
Tetradic#2121C7, #C72174, #C7C721

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C0F4DA
Lighter +30%#94EDC1
Lighter +20%#68E6A7
Lighter +10%#3CDF8E
Darker −10%#1A9B5B
Darker −20%#127041
Darker −30%#0B4428
Darker −40%#04180E
More saturated +25%#04E474
Less saturated −25%#3EAA74

Channel breakdown

R33
G199
B116
Red33 (12.9%)
Green199 (78%)
Blue116 (45.5%)
Hue150°
Saturation (HSL)71.55%
Lightness45.49%
Dominant channelGreen
Hex per channelR 21 · G C7 · B 74

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Every value on this page was computed from “21c774” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.