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Recognised as Colour

#006399

  • #006399
  • Blue
  • Dark
  • Nearest: Steel blue

#006399 is a blue with RGB values 0, 99, 153 and HSL 201°, 100%, 30%. It is a dark colour, so white text on it reaches 6.5:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#006399#006399
HEX#006399
RGBrgb(0, 99, 153)
RGB (0–1)0, 0.3882, 0.6
RGB percentages0%, 38.8%, 60%
HSLhsl(201.2, 100%, 30%)
HSV / HSBhsv(201.2, 100%, 60%)
CMYK100%, 35.3%, 0%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer25,497
CSS custom property--colour: #006399;

Brightness & contrast

Relative luminance0.11224WCAG 2.x, 0 is black and 1 is white
Perceived brightness91.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.47:1
Contrast with white6.47:1WCAG normal text: AA
Contrast with black3.24:1WCAG normal text: Fail
Greyscale equivalent#525252
Inverted#FF9C66

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#49659Bno red cones; affects about 1% of men; ΔE 10.4 from the original
Deuteranopia#345998no green cones; the most common form, about 1% of men; ΔE 11.8 from the original
Tritanopia#007077no blue cones; rare, and affects men and women equally; ΔE 32 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.47:1WCAG large text: AAA
Contrast with black, large text3.24:1WCAG large text: AA

Named colours

Steel blue · ΔE 13.1Cornflower blue · ΔE 28.6Slate grey · ΔE 28.7Light slate grey · ΔE 29.7Dark slateblue · ΔE 31.5Dark slate grey · ΔE 34.6
Nearest named CSS colourSteel blue (#4682B4)ΔE 13.14, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#993600
Analogous#009983, #001699
Triadic#990063, #639900
Split complementary#990016, #998300
Tetradic#830099, #993600, #169900

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#66C9FF
Lighter +30%#33B7FF
Lighter +20%#00A5FF
Lighter +10%#0084CC
Darker −10%#004266
Darker −20%#002133
Darker −30%#000000
Darker −40%#000000
More saturated +25%#006399
Less saturated −25%#135D86

Channel breakdown

R0
G99
B153
Red0 (0%)
Green99 (38.8%)
Blue153 (60%)
Hue201.18°
Saturation (HSL)100%
Lightness30%
Dominant channelBlue
Hex per channelR 00 · G 63 · B 99

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Every value on this page was computed from “hex 006399” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.