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Colour

#28B4B4

  • #28B4B4
  • Cyan
  • Dark
  • Nearest: Light seagreen

#28B4B4 is a cyan with RGB values 40, 180, 180 and HSL 180°, 64%, 43%. It is a dark colour, so black text on it reaches 8.3:1 contrast (AAA for normal text). The nearest named colour is Light seagreen.

Colour values

#28B4B4#28B4B4
HEX#28B4B4
RGBrgb(40, 180, 180)
RGB (0–1)0.1569, 0.7059, 0.7059
RGB percentages15.7%, 70.6%, 70.6%
HSLhsl(180, 63.6%, 43.1%)
HSV / HSBhsv(180, 77.8%, 70.6%)
CMYK77.8%, 0%, 0%, 29.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,667,700
CSS custom property--colour: #28B4B4;

Brightness & contrast

Relative luminance0.36389WCAG 2.x, 0 is black and 1 is white
Perceived brightness152.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 8.28:1
Contrast with white2.54:1WCAG normal text: Fail
Contrast with black8.28:1WCAG normal text: AAA
Greyscale equivalent#969696
Inverted#D74B4B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#A8ABB4no red cones; affects about 1% of men; ΔE 36 from the original
Deuteranopia#949CB5no green cones; the most common form, about 1% of men; ΔE 37.5 from the original
Tritanopia#00BAB4no blue cones; rare, and affects men and women equally; ΔE 5.7 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.54:1WCAG large text: Fail
Contrast with black, large text8.28:1WCAG large text: AAA

Named colours

Light seagreen · ΔE 5Dark turquoise · ΔE 10.5Medium turquoise · ΔE 10.6Dark cyan · ΔE 15.2Cadetblue · ΔE 16.4Turquoise · ΔE 18.3
Nearest named CSS colourLight seagreen (#20B2AA)ΔE 4.96, a close match
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B42828
Analogous#28B46E, #286EB4
Triadic#B428B4, #B4B428
Split complementary#B4286E, #B46E28
Tetradic#6E28B4, #B42828, #6EB428

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B9EFEF
Lighter +30%#8FE6E6
Lighter +20%#65DDDD
Lighter +10%#3BD4D4
Darker −10%#1F8A8A
Darker −20%#156161
Darker −30%#0C3737
Darker −40%#030D0D
More saturated +25%#0DD0D0
Less saturated −25%#449999

Channel breakdown

R40
G180
B180
Red40 (15.7%)
Green180 (70.6%)
Blue180 (70.6%)
Hue180°
Saturation (HSL)63.64%
Lightness43.14%
Dominant channelGreen and Blue
Hex per channelR 28 · G B4 · B B4

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Every value on this page was computed from “28b4b4” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.