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Recognised as Colour

#03366B

  • #03366B
  • Blue
  • Dark
  • Nearest: Dark slateblue

#03366B is a blue with RGB values 3, 54, 107 and HSL 211°, 95%, 22%. It is a dark colour, so white text on it reaches 12:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#03366B#03366B
HEX#03366B
RGBrgb(3, 54, 107)
RGB (0–1)0.0118, 0.2118, 0.4196
RGB percentages1.2%, 21.2%, 42%
HSLhsl(210.6, 94.5%, 21.6%)
HSV / HSBhsv(210.6, 97.2%, 42%)
CMYK97.2%, 49.5%, 0%, 58%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer210,539
CSS custom property--colour: #03366B;

Brightness & contrast

Relative luminance0.03719WCAG 2.x, 0 is black and 1 is white
Perceived brightness55 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.04:1
Contrast with white12.04:1WCAG normal text: AAA
Contrast with black1.74:1WCAG normal text: Fail
Greyscale equivalent#2F2F2F
Inverted#FCC994

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#173B6Dno red cones; affects about 1% of men; ΔE 3.4 from the original
Deuteranopia#00326Ano green cones; the most common form, about 1% of men; ΔE 3.1 from the original
Tritanopia#00434Bno blue cones; rare, and affects men and women equally; ΔE 33.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text12.04:1WCAG large text: AAA
Contrast with black, large text1.74:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 21.7Midnight blue · ΔE 29.3Steel blue · ΔE 31.9Dark slate grey · ΔE 37.7Rebecca purple · ΔE 39Slate grey · ΔE 40
Nearest named CSS colourDark slateblue (#483D8B)ΔE 21.68, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#6B3803
Analogous#036A6B, #04036B
Triadic#6B0336, #366B03
Split complementary#6B0403, #6A6B03
Tetradic#6B036A, #6B3803, #036B04

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#409BFA
Lighter +30%#0F81F8
Lighter +20%#0668CE
Lighter +10%#044F9D
Darker −10%#021D39
Darker −20%#000408
Darker −30%#000000
Darker −40%#000000
More saturated +25%#00366E
Less saturated −25%#11365D

Channel breakdown

R3
G54
B107
Red3 (1.2%)
Green54 (21.2%)
Blue107 (42%)
Hue210.58°
Saturation (HSL)94.55%
Lightness21.57%
Dominant channelBlue
Hex per channelR 03 · G 36 · B 6B

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Every value on this page was computed from “03366b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.