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Colour

#6699CC

  • #6699CC
  • Blue
  • Dark
  • Nearest: Steel blue

#6699CC is a blue with RGB values 102, 153, 204 and HSL 210°, 50%, 60%. It is a dark colour, so black text on it reaches 7:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#6699CC#6699CC
HEX#6699CC
HEX (short)#69C
RGBrgb(102, 153, 204)
RGB (0–1)0.4, 0.6, 0.8
RGB percentages40%, 60%, 80%
HSLhsl(210, 50%, 60%)
HSV / HSBhsv(210, 50%, 80%)
CMYK50%, 25%, 0%, 20%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,724,044
CSS custom property--colour: #6699CC;

Brightness & contrast

Relative luminance0.29967WCAG 2.x, 0 is black and 1 is white
Perceived brightness147 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.99:1
Contrast with white3:1WCAG normal text: Fail
Contrast with black6.99:1WCAG normal text: AA
Greyscale equivalent#929292
Inverted#996633

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#849BCEno red cones; affects about 1% of men; ΔE 8 from the original
Deuteranopia#7790CBno green cones; the most common form, about 1% of men; ΔE 9.4 from the original
Tritanopia#34A5AAno blue cones; rare, and affects men and women equally; ΔE 32.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3:1WCAG large text: AA
Contrast with black, large text6.99:1WCAG large text: AAA

Named colours

Steel blue · ΔE 9.3Light skyblue · ΔE 20Light slate grey · ΔE 21.1Deep skyblue · ΔE 21.5Cornflower blue · ΔE 21.6Slate grey · ΔE 22.6
Nearest named CSS colourSteel blue (#4682B4)ΔE 9.28, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CC9966
Analogous#66CCCC, #6666CC
Triadic#CC6699, #99CC66
Split complementary#CC6666, #CCCC66
Tetradic#CC66CC, #CC9966, #66CC66

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#D9E6F2
Lighter +20%#B3CCE6
Lighter +10%#8CB3D9
Darker −10%#4080BF
Darker −20%#336699
Darker −30%#264D73
Darker −40%#1A334D
More saturated +25%#4D99E6
Less saturated −25%#8099B3

Channel breakdown

R102
G153
B204
Red102 (40%)
Green153 (60%)
Blue204 (80%)
Hue210°
Saturation (HSL)50%
Lightness60%
Dominant channelBlue
Hex per channelR 66 · G 99 · B CC

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Every value on this page was computed from “6699cc” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.