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Colour

#66BBFF

  • #66BBFF
  • Blue
  • Dark
  • Nearest: Deep skyblue

#66BBFF is a blue with RGB values 102, 187, 255 and HSL 207°, 100%, 70%. It is a dark colour, so black text on it reaches 10.1:1 contrast (AAA for normal text). The nearest named colour is Deep skyblue.

Colour values

#66BBFF#66BBFF
HEX#66BBFF
HEX (short)#6BF
RGBrgb(102, 187, 255)
RGB (0–1)0.4, 0.7333, 1
RGB percentages40%, 73.3%, 100%
HSLhsl(206.7, 100%, 70%)
HSV / HSBhsv(206.7, 60%, 100%)
CMYK60%, 26.7%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,732,799
CSS custom property--colour: #66BBFF;

Brightness & contrast

Relative luminance0.45585WCAG 2.x, 0 is black and 1 is white
Perceived brightness176.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 10.12:1
Contrast with white2.08:1WCAG normal text: Fail
Contrast with black10.12:1WCAG normal text: AAA
Greyscale equivalent#AEAEAE
Inverted#994400

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#9DBCFFno red cones; affects about 1% of men; ΔE 13.1 from the original
Deuteranopia#89ADFEno green cones; the most common form, about 1% of men; ΔE 15.3 from the original
Tritanopia#00CBD3no blue cones; rare, and affects men and women equally; ΔE 40.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.08:1WCAG large text: Fail
Contrast with black, large text10.12:1WCAG large text: AAA

Named colours

Deep skyblue · ΔE 11.6Light skyblue · ΔE 15.1Cornflower blue · ΔE 20.8Sky blue · ΔE 22.6Steel blue · ΔE 22.8Light steelblue · ΔE 27
Nearest named CSS colourDeep skyblue (#00BFFF)ΔE 11.64, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFAA66
Analogous#66FFF7, #666EFF
Triadic#FF66BB, #BBFF66
Split complementary#FF666E, #FFF766
Tetradic#F766FF, #FFAA66, #6EFF66

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#FFFFFF
Lighter +20%#CCE8FF
Lighter +10%#99D2FF
Darker −10%#33A4FF
Darker −20%#008EFF
Darker −30%#0071CC
Darker −40%#005599
More saturated +25%#66BBFF
Less saturated −25%#79B9EC

Channel breakdown

R102
G187
B255
Red102 (40%)
Green187 (73.3%)
Blue255 (100%)
Hue206.67°
Saturation (HSL)100%
Lightness70%
Dominant channelBlue
Hex per channelR 66 · G BB · B FF

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Every value on this page was computed from “66bbff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.