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Recognised as Colour

#66ACCF

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

#66ACCF is a blue with RGB values 102, 172, 207 and HSL 200°, 52%, 61%. It is a dark colour, so black text on it reaches 8.4:1 contrast (AAA for normal text). The nearest named colour is Sky blue.

Colour values

#66ACCF#66ACCF
HEX#66ACCF
RGBrgb(102, 172, 207)
RGB (0–1)0.4, 0.6745, 0.8118
RGB percentages40%, 67.5%, 81.2%
HSLhsl(200, 52.2%, 60.6%)
HSV / HSBhsv(200, 50.7%, 81.2%)
CMYK50.7%, 16.9%, 0%, 18.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,728,911
CSS custom property--colour: #66ACCF;

Brightness & contrast

Relative luminance0.36835WCAG 2.x, 0 is black and 1 is white
Perceived brightness159.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 8.37:1
Contrast with white2.51:1WCAG normal text: Fail
Contrast with black8.37:1WCAG normal text: AAA
Greyscale equivalent#A0A0A0
Inverted#995330

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#9BAAD1no red cones; affects about 1% of men; ΔE 16.3 from the original
Deuteranopia#8C9ECFno green cones; the most common form, about 1% of men; ΔE 17.9 from the original
Tritanopia#2AB6B7no blue cones; rare, and affects men and women equally; ΔE 26.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.51:1WCAG large text: Fail
Contrast with black, large text8.37:1WCAG large text: AAA

Named colours

Sky blue · ΔE 12.7Light skyblue · ΔE 13.3Light steelblue · ΔE 18.4Steel blue · ΔE 18.5Deep skyblue · ΔE 19.5Cadetblue · ΔE 19.6
Nearest named CSS colourSky blue (#87CEEB)ΔE 12.73, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CF8966
Analogous#66CFBE, #6678CF
Triadic#CF66AC, #ACCF66
Split complementary#CF6678, #CFBE66
Tetradic#BD66CF, #CF8966, #78CF66

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#DAEBF4
Lighter +20%#B4D6E7
Lighter +10%#8DC1DB
Darker −10%#3F97C3
Darker −20%#317A9E
Darker −30%#255C77
Darker −40%#193E50
More saturated +25%#4DB4E8
Less saturated −25%#7FA4B6

Channel breakdown

R102
G172
B207
Red102 (40%)
Green172 (67.5%)
Blue207 (81.2%)
Hue200°
Saturation (HSL)52.24%
Lightness60.59%
Dominant channelBlue
Hex per channelR 66 · G AC · B CF

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