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Recognised as Colour

#004591

  • #004591
  • Blue
  • Dark
  • Nearest: Dark slateblue

#004591 is a blue with RGB values 0, 69, 145 and HSL 211°, 100%, 28%. It is a dark colour, so white text on it reaches 9.3:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#004591#004591
HEX#004591
RGBrgb(0, 69, 145)
RGB (0–1)0, 0.2706, 0.5686
RGB percentages0%, 27.1%, 56.9%
HSLhsl(211.4, 100%, 28.4%)
HSV / HSBhsv(211.4, 100%, 56.9%)
CMYK100%, 52.4%, 0%, 43.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer17,809
CSS custom property--colour: #004591;

Brightness & contrast

Relative luminance0.06301WCAG 2.x, 0 is black and 1 is white
Perceived brightness72.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.29:1
Contrast with white9.29:1WCAG normal text: AAA
Contrast with black2.26:1WCAG normal text: Fail
Greyscale equivalent#3C3C3C
Inverted#FFBA6E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0F4D94no red cones; affects about 1% of men; ΔE 5.2 from the original
Deuteranopia#004190no green cones; the most common form, about 1% of men; ΔE 3 from the original
Tritanopia#005864no blue cones; rare, and affects men and women equally; ΔE 45.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text9.29:1WCAG large text: AAA
Contrast with black, large text2.26:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 14Midnight blue · ΔE 23.7Royal blue · ΔE 28.7Slate blue · ΔE 29.6Rebecca purple · ΔE 30Steel blue · ΔE 31.8
Nearest named CSS colourDark slateblue (#483D8B)ΔE 13.99, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#914C00
Analogous#008E91, #040091
Triadic#910045, #459100
Split complementary#910300, #8E9100
Tetradic#91008D, #914C00, #009103

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#5EABFF
Lighter +30%#2B90FF
Lighter +20%#0076F7
Lighter +10%#005DC4
Darker −10%#002D5E
Darker −20%#00142B
Darker −30%#000000
Darker −40%#000000
More saturated +25%#004591
Less saturated −25%#12467F

Channel breakdown

R0
G69
B145
Red0 (0%)
Green69 (27.1%)
Blue145 (56.9%)
Hue211.45°
Saturation (HSL)100%
Lightness28.43%
Dominant channelBlue
Hex per channelR 00 · G 45 · B 91

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Every value on this page was computed from “hex 004591” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.