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Colour

#66AEFB

  • #66AEFB
  • Blue
  • Dark
  • Nearest: Cornflower blue

#66AEFB is a blue with RGB values 102, 174, 251 and HSL 211°, 95%, 69%. It is a dark colour, so black text on it reaches 9:1 contrast (AAA for normal text). The nearest named colour is Cornflower blue.

Colour values

#66AEFB#66AEFB
HEX#66AEFB
RGBrgb(102, 174, 251)
RGB (0–1)0.4, 0.6824, 0.9843
RGB percentages40%, 68.2%, 98.4%
HSLhsl(211, 94.9%, 69.2%)
HSV / HSBhsv(211, 59.4%, 98.4%)
CMYK59.4%, 30.7%, 0%, 1.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,729,467
CSS custom property--colour: #66AEFB;

Brightness & contrast

Relative luminance0.40062WCAG 2.x, 0 is black and 1 is white
Perceived brightness167.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.01:1
Contrast with white2.33:1WCAG normal text: Fail
Contrast with black9.01:1WCAG normal text: AAA
Greyscale equivalent#A4A4A4
Inverted#995104

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#8DB2FEno red cones; affects about 1% of men; ΔE 8.5 from the original
Deuteranopia#7AA3F9no green cones; the most common form, about 1% of men; ΔE 10.2 from the original
Tritanopia#00C0C9no blue cones; rare, and affects men and women equally; ΔE 46.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.33:1WCAG large text: Fail
Contrast with black, large text9.01:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 12.9Deep skyblue · ΔE 17.9Steel blue · ΔE 21.7Light skyblue · ΔE 22.1Dodgerblue · ΔE 23.3Sky blue · ΔE 29.5
Nearest named CSS colourCornflower blue (#6495ED)ΔE 12.9, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FBB366
Analogous#66F9FB, #6866FB
Triadic#FB66AE, #AEFB66
Split complementary#FB6866, #F9FB66
Tetradic#FB66F9, #FBB366, #66FB68

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#FBFDFF
Lighter +20%#C9E3FE
Lighter +10%#98C8FC
Darker −10%#3494FA
Darker −20%#067AF5
Darker −30%#0561C3
Darker −40%#044891
More saturated +25%#62AEFF
Less saturated −25%#7AAFE7

Channel breakdown

R102
G174
B251
Red102 (40%)
Green174 (68.2%)
Blue251 (98.4%)
Hue211.01°
Saturation (HSL)94.9%
Lightness69.22%
Dominant channelBlue
Hex per channelR 66 · G AE · B FB

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