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Recognised as Colour

#04EFFF

  • #04EFFF
  • Cyan
  • Light
  • Nearest: Aqua

#04EFFF is a cyan with RGB values 4, 239, 255 and HSL 184°, 100%, 51%. It is a light colour, so black text on it reaches 14.8:1 contrast (AAA for normal text). The nearest named colour is Aqua.

Colour values

#04EFFF#04EFFF
HEX#04EFFF
RGBrgb(4, 239, 255)
RGB (0–1)0.0157, 0.9373, 1
RGB percentages1.6%, 93.7%, 100%
HSLhsl(183.8, 100%, 50.8%)
HSV / HSBhsv(183.8, 98.4%, 100%)
CMYK98.4%, 6.3%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer323,583
CSS custom property--colour: #04EFFF;

Brightness & contrast

Relative luminance0.68979WCAG 2.x, 0 is black and 1 is white
Perceived brightness202.4 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 14.8:1
Contrast with white1.42:1WCAG normal text: Fail
Contrast with black14.8:1WCAG normal text: AAA
Greyscale equivalent#BEBEBE
Inverted#FB1000

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#DAE4FFno red cones; affects about 1% of men; ΔE 43.6 from the original
Deuteranopia#BED0FFno green cones; the most common form, about 1% of men; ΔE 45.2 from the original
Tritanopia#00F9F4no blue cones; rare, and affects men and women equally; ΔE 12.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text1.42:1WCAG large text: Fail
Contrast with black, large text14.8:1WCAG large text: AAA

Named colours

Aqua · ΔE 11Cyan · ΔE 11Dark turquoise · ΔE 13.6Medium turquoise · ΔE 16.4Turquoise · ΔE 18.1Light seagreen · ΔE 25.7
Nearest named CSS colourAqua (#00FFFF)ΔE 10.98, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FF1404
Analogous#04FF92, #0471FF
Triadic#FF04EF, #EFFF04
Split complementary#FF0471, #FF9204
Tetradic#9204FF, #FF1404, #72FF04

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D0FCFF
Lighter +30%#9DF9FF
Lighter +20%#6AF6FF
Lighter +10%#37F2FF
Darker −10%#00C3D0
Darker −20%#00939D
Darker −30%#00636A
Darker −40%#003337
More saturated +25%#04EFFF
Less saturated −25%#23D4E0

Channel breakdown

R4
G239
B255
Red4 (1.6%)
Green239 (93.7%)
Blue255 (100%)
Hue183.82°
Saturation (HSL)100%
Lightness50.78%
Dominant channelBlue
Hex per channelR 04 · G EF · B FF

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Every value on this page was computed from “04efff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.