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Colour

#0033CB

  • #0033CB
  • Blue
  • Dark
  • Nearest: Dark blue

#0033CB is a blue with RGB values 0, 51, 203 and HSL 225°, 100%, 40%. It is a dark colour, so white text on it reaches 9:1 contrast (AAA for normal text). The nearest named colour is Dark blue.

Colour values

#0033CB#0033CB
HEX#0033CB
RGBrgb(0, 51, 203)
RGB (0–1)0, 0.2, 0.7961
RGB percentages0%, 20%, 79.6%
HSLhsl(224.9, 100%, 39.8%)
HSV / HSBhsv(224.9, 100%, 79.6%)
CMYK100%, 74.9%, 0%, 20.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer13,259
CSS custom property--colour: #0033CB;

Brightness & contrast

Relative luminance0.06679WCAG 2.x, 0 is black and 1 is white
Perceived brightness78.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.99:1
Contrast with white8.99:1WCAG normal text: AAA
Contrast with black2.34:1WCAG normal text: Fail
Greyscale equivalent#333333
Inverted#FFCC34

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0052CFno red cones; affects about 1% of men; ΔE 22.3 from the original
Deuteranopia#0040C8no green cones; the most common form, about 1% of men; ΔE 11.2 from the original
Tritanopia#00617Dno blue cones; rare, and affects men and women equally; ΔE 84.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.99:1WCAG large text: AAA
Contrast with black, large text2.34:1WCAG large text: Fail

Named colours

Dark blue · ΔE 20.1Medium blue · ΔE 23.3Navy · ΔE 23.8Blue violet · ΔE 25.4Medium slateblue · ΔE 26.6Slate blue · ΔE 29
Nearest named CSS colourDark blue (#00008B)ΔE 20.14, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CB9800
Analogous#0098CB, #3300CB
Triadic#CB0033, #33CB00
Split complementary#CB3200, #99CB00
Tetradic#CB0098, #CB9800, #00CB33

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#98B2FF
Lighter +30%#658CFF
Lighter +20%#3266FF
Lighter +10%#0040FE
Darker −10%#002698
Darker −20%#001965
Darker −30%#000D32
Darker −40%#000000
More saturated +25%#0033CB
Less saturated −25%#1940B2

Channel breakdown

R0
G51
B203
Red0 (0%)
Green51 (20%)
Blue203 (79.6%)
Hue224.93°
Saturation (HSL)100%
Lightness39.8%
Dominant channelBlue
Hex per channelR 00 · G 33 · B CB

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Every value on this page was computed from “0033cb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.