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Recognised as Colour

#42A388

  • #42A388
  • Cyan
  • Dark
  • Nearest: Light seagreen

#42A388 is a cyan with RGB values 66, 163, 136 and HSL 163°, 42%, 45%. It is a dark colour, so black text on it reaches 6.8:1 contrast (AA for normal text). The nearest named colour is Light seagreen.

Colour values

#42A388#42A388
HEX#42A388
RGBrgb(66, 163, 136)
RGB (0–1)0.2588, 0.6392, 0.5333
RGB percentages25.9%, 63.9%, 53.3%
HSLhsl(163.3, 42.4%, 44.9%)
HSV / HSBhsv(163.3, 59.5%, 63.9%)
CMYK59.5%, 0%, 16.6%, 36.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,367,240
CSS custom property--colour: #42A388;

Brightness & contrast

Relative luminance0.2913WCAG 2.x, 0 is black and 1 is white
Perceived brightness137.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.83:1
Contrast with white3.08:1WCAG normal text: Fail
Contrast with black6.83:1WCAG normal text: AA
Greyscale equivalent#8C8C8C
Inverted#BD5C77

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#9E9987no red cones; affects about 1% of men; ΔE 34.1 from the original
Deuteranopia#908F8Ano green cones; the most common form, about 1% of men; ΔE 34.7 from the original
Tritanopia#00A49Bno blue cones; rare, and affects men and women equally; ΔE 11.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.08:1WCAG large text: AA
Contrast with black, large text6.83:1WCAG large text: AAA

Named colours

Light seagreen · ΔE 13.1Medium aquamarine · ΔE 15.4Dark cyan · ΔE 17.6Sea green · ΔE 17.8Teal · ΔE 19.9Dark seagreen · ΔE 20.2
Nearest named CSS colourLight seagreen (#20B2AA)ΔE 13.11, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A3425D
Analogous#42A357, #428EA3
Triadic#8842A3, #A38842
Split complementary#A3428D, #A35742
Tetradic#5842A3, #A3425D, #8EA342

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C8E9E0
Lighter +30%#A4DACB
Lighter +20%#80CBB6
Lighter +10%#5BBDA2
Darker −10%#337F6A
Darker −20%#255A4B
Darker −30%#16362D
Darker −40%#07120F
More saturated +25%#25C095
Less saturated −25%#5F867B

Channel breakdown

R66
G163
B136
Red66 (25.9%)
Green163 (63.9%)
Blue136 (53.3%)
Hue163.3°
Saturation (HSL)42.36%
Lightness44.9%
Dominant channelGreen
Hex per channelR 42 · G A3 · B 88

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Every value on this page was computed from “42a388” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.