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Colour

#003F8E

  • #003F8E
  • Blue
  • Dark
  • Nearest: Dark slateblue

#003F8E is a blue with RGB values 0, 63, 142 and HSL 213°, 100%, 28%. It is a dark colour, so white text on it reaches 10:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#003F8E#003F8E
HEX#003F8E
RGBrgb(0, 63, 142)
RGB (0–1)0, 0.2471, 0.5569
RGB percentages0%, 24.7%, 55.7%
HSLhsl(213.4, 100%, 27.8%)
HSV / HSBhsv(213.4, 100%, 55.7%)
CMYK100%, 55.6%, 0%, 44.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,270
CSS custom property--colour: #003F8E;

Brightness & contrast

Relative luminance0.05508WCAG 2.x, 0 is black and 1 is white
Perceived brightness68 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.99:1
Contrast with white9.99:1WCAG normal text: AAA
Contrast with black2.1:1WCAG normal text: Fail
Greyscale equivalent#373737
Inverted#FFC071

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004991no red cones; affects about 1% of men; ΔE 7.4 from the original
Deuteranopia#003D8Cno green cones; the most common form, about 1% of men; ΔE 0.9 from the original
Tritanopia#005360no blue cones; rare, and affects men and women equally; ΔE 47.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text9.99:1WCAG large text: AAA
Contrast with black, large text2.1:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 12.3Midnight blue · ΔE 20.1Rebecca purple · ΔE 27.4Royal blue · ΔE 27.9Slate blue · ΔE 28.1Medium purple · ΔE 34.1
Nearest named CSS colourDark slateblue (#483D8B)ΔE 12.3, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8E4F00
Analogous#00868E, #08008E
Triadic#8E003F, #3F8E00
Split complementary#8E0800, #868E00
Tetradic#8E0086, #8E4F00, #008E08

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#5BA4FF
Lighter +30%#2887FF
Lighter +20%#006CF4
Lighter +10%#0056C1
Darker −10%#00285B
Darker −20%#001228
Darker −30%#000000
Darker −40%#000000
More saturated +25%#003F8E
Less saturated −25%#12417C

Channel breakdown

R0
G63
B142
Red0 (0%)
Green63 (24.7%)
Blue142 (55.7%)
Hue213.38°
Saturation (HSL)100%
Lightness27.84%
Dominant channelBlue
Hex per channelR 00 · G 3F · B 8E

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Every value on this page was computed from “003f8e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.