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Recognised as Colour

#6599AA

  • #6599AA
  • Cyan
  • Dark
  • Nearest: Cadetblue

#6599AA is a cyan with RGB values 101, 153, 170 and HSL 195°, 29%, 53%. It is a dark colour, so black text on it reaches 6.7:1 contrast (AA for normal text). The nearest named colour is Cadetblue.

Colour values

#6599AA#6599AA
HEX#6599AA
RGBrgb(101, 153, 170)
RGB (0–1)0.3961, 0.6, 0.6667
RGB percentages39.6%, 60%, 66.7%
HSLhsl(194.8, 28.9%, 53.1%)
HSV / HSBhsv(194.8, 40.6%, 66.7%)
CMYK40.6%, 10%, 0%, 33.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,658,474
CSS custom property--colour: #6599AA;

Brightness & contrast

Relative luminance0.28451WCAG 2.x, 0 is black and 1 is white
Perceived brightness141.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.69:1
Contrast with white3.14:1WCAG normal text: Fail
Contrast with black6.69:1WCAG normal text: AA
Greyscale equivalent#8F8F8F
Inverted#9A6655

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#8F96ABno red cones; affects about 1% of men; ΔE 15 from the original
Deuteranopia#848EAAno green cones; the most common form, about 1% of men; ΔE 15.5 from the original
Tritanopia#499F9Eno blue cones; rare, and affects men and women equally; ΔE 14.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.14:1WCAG large text: AA
Contrast with black, large text6.69:1WCAG large text: AAA

Named colours

Cadetblue · ΔE 9.8Light slate grey · ΔE 11.8Slate grey · ΔE 13.5Sky blue · ΔE 20.3Dark cyan · ΔE 20.3Gray · ΔE 20.3
Nearest named CSS colourCadetblue (#5F9EA0)ΔE 9.81, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AA7665
Analogous#65AA99, #6576AA
Triadic#AA6599, #99AA65
Split complementary#AA6576, #AA9965
Tetradic#9965AA, #AA7665, #76AA65

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E8F0F3
Lighter +30%#C8DAE0
Lighter +20%#A7C5CE
Lighter +10%#86AFBC
Darker −10%#4E7E8E
Darker −20%#3C616D
Darker −30%#2A444C
Darker −40%#18262B
More saturated +25%#47A8C8
Less saturated −25%#838A8C

Channel breakdown

R101
G153
B170
Red101 (39.6%)
Green153 (60%)
Blue170 (66.7%)
Hue194.78°
Saturation (HSL)28.87%
Lightness53.14%
Dominant channelBlue
Hex per channelR 65 · G 99 · B AA

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Every value on this page was computed from “6599aa” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.