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Colour

#6599CB

  • #6599CB
  • Blue
  • Dark
  • Nearest: Steel blue

#6599CB is a blue with RGB values 101, 153, 203 and HSL 209°, 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

#6599CB#6599CB
HEX#6599CB
RGBrgb(101, 153, 203)
RGB (0–1)0.3961, 0.6, 0.7961
RGB percentages39.6%, 60%, 79.6%
HSLhsl(209.4, 49.5%, 59.6%)
HSV / HSBhsv(209.4, 50.2%, 79.6%)
CMYK50.2%, 24.6%, 0%, 20.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,658,507
CSS custom property--colour: #6599CB;

Brightness & contrast

Relative luminance0.29861WCAG 2.x, 0 is black and 1 is white
Perceived brightness146.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.97:1
Contrast with white3.01:1WCAG normal text: Fail
Contrast with black6.97:1WCAG normal text: AA
Greyscale equivalent#929292
Inverted#9A6634

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#859ACDno red cones; affects about 1% of men; ΔE 8.9 from the original
Deuteranopia#7790CAno green cones; the most common form, about 1% of men; ΔE 9.7 from the original
Tritanopia#32A5AAno blue cones; rare, and affects men and women equally; ΔE 32.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.01:1WCAG large text: AA
Contrast with black, large text6.97:1WCAG large text: AAA

Named colours

Steel blue · ΔE 9.2Light skyblue · ΔE 19.8Light slate grey · ΔE 20.7Deep skyblue · ΔE 21.4Slate grey · ΔE 22.3Cornflower blue · ΔE 22.3
Nearest named CSS colourSteel blue (#4682B4)ΔE 9.17, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CB9765
Analogous#65CBCA, #6566CB
Triadic#CB6599, #99CB65
Split complementary#CB6566, #CBCA65
Tetradic#CA65CB, #CB9765, #66CB65

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FEFEFE
Lighter +30%#D7E5F2
Lighter +20%#B1CCE5
Lighter +10%#8BB2D8
Darker −10%#4080BD
Darker −20%#336697
Darker −30%#264C71
Darker −40%#19324B
More saturated +25%#4B9AE5
Less saturated −25%#7F98B1

Channel breakdown

R101
G153
B203
Red101 (39.6%)
Green153 (60%)
Blue203 (79.6%)
Hue209.41°
Saturation (HSL)49.51%
Lightness59.61%
Dominant channelBlue
Hex per channelR 65 · G 99 · B CB

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