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Recognised as Colour

#668F99

  • #668F99
  • Cyan
  • Dark
  • Nearest: Light slate grey

#668F99 is a cyan with RGB values 102, 143, 153 and HSL 192°, 20%, 50%. It is a dark colour, so black text on it reaches 6:1 contrast (AA for normal text). The nearest named colour is Light slate grey.

Colour values

#668F99#668F99
HEX#668F99
RGBrgb(102, 143, 153)
RGB (0–1)0.4, 0.5608, 0.6
RGB percentages40%, 56.1%, 60%
HSLhsl(191.8, 20%, 50%)
HSV / HSBhsv(191.8, 33.3%, 60%)
CMYK33.3%, 6.5%, 0%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,721,433
CSS custom property--colour: #668F99;

Brightness & contrast

Relative luminance0.2477WCAG 2.x, 0 is black and 1 is white
Perceived brightness133.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.95:1
Contrast with white3.53:1WCAG normal text: Fail
Contrast with black5.95:1WCAG normal text: AA
Greyscale equivalent#878787
Inverted#997066

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#878C9Ano red cones; affects about 1% of men; ΔE 12.8 from the original
Deuteranopia#7F8699no green cones; the most common form, about 1% of men; ΔE 13.1 from the original
Tritanopia#549392no blue cones; rare, and affects men and women equally; ΔE 9.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.53:1WCAG large text: AA
Contrast with black, large text5.95:1WCAG large text: AAA

Named colours

Light slate grey · ΔE 9.4Cadetblue · ΔE 9.6Slate grey · ΔE 10.2Gray · ΔE 15.5Teal · ΔE 19.4Dark grey · ΔE 19.5
Nearest named CSS colourLight slate grey (#778899)ΔE 9.38, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#997066
Analogous#66998A, #667699
Triadic#99668F, #8F9966
Split complementary#996676, #998A66
Tetradic#8A6699, #997066, #769966

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E0E9EB
Lighter +30%#C2D2D6
Lighter +20%#A3BCC2
Lighter +10%#85A5AD
Darker −10%#52727A
Darker −20%#3D565C
Darker −30%#29393D
Darker −40%#141D1F
More saturated +25%#46A2B9
Less saturated −25%#808080

Channel breakdown

R102
G143
B153
Red102 (40%)
Green143 (56.1%)
Blue153 (60%)
Hue191.76°
Saturation (HSL)20%
Lightness50%
Dominant channelBlue
Hex per channelR 66 · G 8F · B 99

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Every value on this page was computed from “668f99” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.