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Colour

#003981

  • #003981
  • Blue
  • Dark
  • Nearest: Dark slateblue

#003981 is a blue with RGB values 0, 57, 129 and HSL 213°, 100%, 25%. It is a dark colour, so white text on it reaches 11:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#003981#003981
HEX#003981
RGBrgb(0, 57, 129)
RGB (0–1)0, 0.2235, 0.5059
RGB percentages0%, 22.4%, 50.6%
HSLhsl(213.5, 100%, 25.3%)
HSV / HSBhsv(213.5, 100%, 50.6%)
CMYK100%, 55.8%, 0%, 49.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer14,721
CSS custom property--colour: #003981;

Brightness & contrast

Relative luminance0.04511WCAG 2.x, 0 is black and 1 is white
Perceived brightness61.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.04:1
Contrast with white11.04:1WCAG normal text: AAA
Contrast with black1.9:1WCAG normal text: Fail
Greyscale equivalent#323232
Inverted#FFC67E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004284no red cones; affects about 1% of men; ΔE 6.6 from the original
Deuteranopia#003780no green cones; the most common form, about 1% of men; ΔE 1.3 from the original
Tritanopia#004B57no blue cones; rare, and affects men and women equally; ΔE 44 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text11.04:1WCAG large text: AAA
Contrast with black, large text1.9:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 13.1Midnight blue · ΔE 20.1Rebecca purple · ΔE 29.4Slate blue · ΔE 32.1Royal blue · ΔE 32.5Steel blue · ΔE 35.3
Nearest named CSS colourDark slateblue (#483D8B)ΔE 13.12, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#814800
Analogous#007981, #080081
Triadic#810039, #398100
Split complementary#810700, #798100
Tetradic#810079, #814800, #008108

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#4E9CFF
Lighter +30%#1B80FF
Lighter +20%#0066E7
Lighter +10%#0050B4
Darker −10%#00224E
Darker −20%#000C1B
Darker −30%#000000
Darker −40%#000000
More saturated +25%#003981
Less saturated −25%#103B71

Channel breakdown

R0
G57
B129
Red0 (0%)
Green57 (22.4%)
Blue129 (50.6%)
Hue213.49°
Saturation (HSL)100%
Lightness25.29%
Dominant channelBlue
Hex per channelR 00 · G 39 · B 81

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Every value on this page was computed from “hex 003981” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.