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Colour

#003B8F

  • #003B8F
  • Blue
  • Dark
  • Nearest: Dark slateblue

#003B8F is a blue with RGB values 0, 59, 143 and HSL 215°, 100%, 28%. It is a dark colour, so white text on it reaches 10.4:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#003B8F#003B8F
HEX#003B8F
RGBrgb(0, 59, 143)
RGB (0–1)0, 0.2314, 0.5608
RGB percentages0%, 23.1%, 56.1%
HSLhsl(215.2, 100%, 28%)
HSV / HSBhsv(215.2, 100%, 56.1%)
CMYK100%, 58.7%, 0%, 43.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer15,247
CSS custom property--colour: #003B8F;

Brightness & contrast

Relative luminance0.05111WCAG 2.x, 0 is black and 1 is white
Perceived brightness66.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.38:1
Contrast with white10.38:1WCAG normal text: AAA
Contrast with black2.02:1WCAG normal text: Fail
Greyscale equivalent#353535
Inverted#FFC470

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004692no red cones; affects about 1% of men; ΔE 8.2 from the original
Deuteranopia#003A8Dno green cones; the most common form, about 1% of men; ΔE 0.7 from the original
Tritanopia#00515Fno blue cones; rare, and affects men and women equally; ΔE 50.7 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.38:1WCAG large text: AAA
Contrast with black, large text2.02:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 11.8Midnight blue · ΔE 16.9Rebecca purple · ΔE 24.7Slate blue · ΔE 25.9Royal blue · ΔE 26.3Medium purple · ΔE 33.1
Nearest named CSS colourDark slateblue (#483D8B)ΔE 11.79, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8F5400
Analogous#00838F, #0C008F
Triadic#8F003B, #3B8F00
Split complementary#8F0D00, #838F00
Tetradic#8F0083, #8F5400, #008F0D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#5C9FFF
Lighter +30%#2981FF
Lighter +20%#0065F5
Lighter +10%#0050C2
Darker −10%#00265C
Darker −20%#001129
Darker −30%#000000
Darker −40%#000000
More saturated +25%#003B8F
Less saturated −25%#123E7D

Channel breakdown

R0
G59
B143
Red0 (0%)
Green59 (23.1%)
Blue143 (56.1%)
Hue215.24°
Saturation (HSL)100%
Lightness28.04%
Dominant channelBlue
Hex per channelR 00 · G 3B · B 8F

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Every value on this page was computed from “003b8f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.