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Colour

#66AACD

  • #66AACD
  • Blue
  • Dark
  • Nearest: Sky blue

#66AACD is a blue with RGB values 102, 170, 205 and HSL 200°, 51%, 60%. It is a dark colour, so black text on it reaches 8.2:1 contrast (AAA for normal text). The nearest named colour is Sky blue.

Colour values

#66AACD#66AACD
HEX#66AACD
RGBrgb(102, 170, 205)
RGB (0–1)0.4, 0.6667, 0.8039
RGB percentages40%, 66.7%, 80.4%
HSLhsl(200.4, 50.7%, 60.2%)
HSV / HSBhsv(200.4, 50.2%, 80.4%)
CMYK50.2%, 17.1%, 0%, 19.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,728,397
CSS custom property--colour: #66AACD;

Brightness & contrast

Relative luminance0.35982WCAG 2.x, 0 is black and 1 is white
Perceived brightness157.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 8.2:1
Contrast with white2.56:1WCAG normal text: Fail
Contrast with black8.2:1WCAG normal text: AAA
Greyscale equivalent#9E9E9E
Inverted#995532

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#99A8CFno red cones; affects about 1% of men; ΔE 15.8 from the original
Deuteranopia#8A9DCDno green cones; the most common form, about 1% of men; ΔE 16.8 from the original
Tritanopia#2EB4B5no blue cones; rare, and affects men and women equally; ΔE 25.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.56:1WCAG large text: Fail
Contrast with black, large text8.2:1WCAG large text: AAA

Named colours

Sky blue · ΔE 13.4Light skyblue · ΔE 13.9Steel blue · ΔE 17.8Light steelblue · ΔE 18.5Cadetblue · ΔE 19.5Light slate grey · ΔE 19.6
Nearest named CSS colourSky blue (#87CEEB)ΔE 13.42, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CD8966
Analogous#66CDBC, #6677CD
Triadic#CD66AA, #AACD66
Split complementary#CD6677, #CDBD66
Tetradic#BC66CD, #CD8966, #77CD66

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#D9EAF3
Lighter +20%#B3D5E6
Lighter +10%#8CBFDA
Darker −10%#4095C0
Darker −20%#32779B
Darker −30%#265A74
Darker −40%#193C4E
More saturated +25%#4DB2E6
Less saturated −25%#7FA2B4

Channel breakdown

R102
G170
B205
Red102 (40%)
Green170 (66.7%)
Blue205 (80.4%)
Hue200.39°
Saturation (HSL)50.74%
Lightness60.2%
Dominant channelBlue
Hex per channelR 66 · G AA · B CD

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