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Colour

#003DB1

  • #003DB1
  • Blue
  • Dark
  • Nearest: Slate blue

#003DB1 is a blue with RGB values 0, 61, 177 and HSL 219°, 100%, 35%. It is a dark colour, so white text on it reaches 9.1:1 contrast (AAA for normal text). The nearest named colour is Slate blue.

Colour values

#003DB1#003DB1
HEX#003DB1
RGBrgb(0, 61, 177)
RGB (0–1)0, 0.2392, 0.6941
RGB percentages0%, 23.9%, 69.4%
HSLhsl(219.3, 100%, 34.7%)
HSV / HSBhsv(219.3, 100%, 69.4%)
CMYK100%, 65.5%, 0%, 30.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer15,793
CSS custom property--colour: #003DB1;

Brightness & contrast

Relative luminance0.06512WCAG 2.x, 0 is black and 1 is white
Perceived brightness75.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.12:1
Contrast with white9.12:1WCAG normal text: AAA
Contrast with black2.3:1WCAG normal text: Fail
Greyscale equivalent#383838
Inverted#FFC24E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0050B5no red cones; affects about 1% of men; ΔE 14.1 from the original
Deuteranopia#0041AFno green cones; the most common form, about 1% of men; ΔE 4.4 from the original
Tritanopia#005D71no blue cones; rare, and affects men and women equally; ΔE 67.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text9.12:1WCAG large text: AAA
Contrast with black, large text2.3:1WCAG large text: Fail

Named colours

Slate blue · ΔE 17.1Royal blue · ΔE 18Rebecca purple · ΔE 21.6Midnight blue · ΔE 21.8Medium slateblue · ΔE 23.4Navy · ΔE 23.7
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 17.14, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B17400
Analogous#0095B1, #1C00B1
Triadic#B1003D, #3DB100
Split complementary#B11C00, #95B100
Tetradic#B10095, #B17400, #00B11C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7EAAFF
Lighter +30%#4B89FF
Lighter +20%#1868FF
Lighter +10%#004FE4
Darker −10%#002B7E
Darker −20%#001A4B
Darker −30%#000818
Darker −40%#000000
More saturated +25%#003DB1
Less saturated −25%#16449B

Channel breakdown

R0
G61
B177
Red0 (0%)
Green61 (23.9%)
Blue177 (69.4%)
Hue219.32°
Saturation (HSL)100%
Lightness34.71%
Dominant channelBlue
Hex per channelR 00 · G 3D · B B1

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Every value on this page was computed from “003db1” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.