Colour

#66DDFF

#66DDFF
Cyan
Light
Nearest: Sky blue

#66DDFF is a cyan with RGB values 102, 221, 255 and HSL 193°, 100%, 70%. It is a light colour, so black text on it reaches 13.4:1 contrast (AAA for normal text). The nearest named colour is Sky blue.

Colour values

#66DDFF#66DDFF

HEX#66DDFF

HEX (short)#6DF

RGBrgb(102, 221, 255)

RGB (0–1)0.4, 0.8667, 1

RGB percentages40%, 86.7%, 100%

HSLhsl(193.3, 100%, 70%)

HSV / HSBhsv(193.3, 60%, 100%)

CMYK60%, 13.3%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer6,741,503

CSS custom property--colour: #66DDFF;

Brightness & contrast

Relative luminance0.61758WCAG 2.x, 0 is black and 1 is white

Perceived brightness198 of 255ITU-R BT.601 weighting

Light or darkLight

Best text colour on this backgroundBlackcontrast 13.35:1

Contrast with white1.57:1WCAG normal text: Fail

Contrast with black13.35:1WCAG normal text: AAA

Greyscale equivalent#C6C6C6

Inverted#992200

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#C8D7FFno red cones; affects about 1% of men; ΔE 27.8 from the original

Deuteranopia#B2C7FFno green cones; the most common form, about 1% of men; ΔE 29.5 from the original

Tritanopia#00E8E8no blue cones; rare, and affects men and women equally; ΔE 24.9 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text1.57:1WCAG large text: Fail

Contrast with black, large text13.35:1WCAG large text: AAA

Named colours

Sky blue · ΔE 11 Light skyblue · ΔE 13.5 Light blue · ΔE 19.9 Deep skyblue · ΔE 19.9 Powder blue · ΔE 21.2 Pale turquoise · ΔE 21.9

Nearest named CSS colourSky blue (#87CEEB)ΔE 11.04, a distinctly different colour

Hue familycyan

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#FF8866

Analogous#66FFD5, #6690FF

Triadic#FF66DD, #DDFF66

Split complementary#FF6690, #FFD566

Tetradic#D566FF, #FF8866, #90FF66

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#FFFFFF

Lighter +30%#FFFFFF

Lighter +20%#CCF4FF

Lighter +10%#99E8FF

Darker −10%#33D2FF

Darker −20%#00C6FF

Darker −30%#009FCC

Darker −40%#007799

More saturated +25%#66DDFF

Less saturated −25%#79D2EC

Channel breakdown

R102

G221

B255

Red102 (40%)

Green221 (86.7%)

Blue255 (100%)

Hue193.33°

Saturation (HSL)100%

Lightness70%

Dominant channelBlue

Hex per channelR 66 · G DD · B FF

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#66DDFF

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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