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Recognised as Colour

#003664

  • #003664
  • Blue
  • Dark
  • Nearest: Dark slateblue

#003664 is a blue with RGB values 0, 54, 100 and HSL 208°, 100%, 20%. It is a dark colour, so white text on it reaches 12.3:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#003664#003664
HEX#003664
RGBrgb(0, 54, 100)
RGB (0–1)0, 0.2118, 0.3922
RGB percentages0%, 21.2%, 39.2%
HSLhsl(207.6, 100%, 19.6%)
HSV / HSBhsv(207.6, 100%, 39.2%)
CMYK100%, 46%, 0%, 60.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer13,924
CSS custom property--colour: #003664;

Brightness & contrast

Relative luminance0.03558WCAG 2.x, 0 is black and 1 is white
Perceived brightness53.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.27:1
Contrast with white12.27:1WCAG normal text: AAA
Contrast with black1.71:1WCAG normal text: Fail
Greyscale equivalent#2E2E2E
Inverted#FFC99B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#1E3A66no red cones; affects about 1% of men; ΔE 3.9 from the original
Deuteranopia#093163no green cones; the most common form, about 1% of men; ΔE 4.6 from the original
Tritanopia#004148no blue cones; rare, and affects men and women equally; ΔE 29.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text12.27:1WCAG large text: AAA
Contrast with black, large text1.71:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 26.1Steel blue · ΔE 31.3Dark slate grey · ΔE 33.1Midnight blue · ΔE 33.9Slate grey · ΔE 37.6Black · ΔE 38.7
Nearest named CSS colourDark slateblue (#483D8B)ΔE 26.14, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#642E00
Analogous#006460, #000464
Triadic#640036, #366400
Split complementary#640004, #646000
Tetradic#600064, #642E00, #046400

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#31A0FF
Lighter +30%#0089FD
Lighter +20%#006DCA
Lighter +10%#005297
Darker −10%#001A31
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#003664
Less saturated −25%#0C3558

Channel breakdown

R0
G54
B100
Red0 (0%)
Green54 (21.2%)
Blue100 (39.2%)
Hue207.6°
Saturation (HSL)100%
Lightness19.61%
Dominant channelBlue
Hex per channelR 00 · G 36 · B 64

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Every value on this page was computed from “hex 003664” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.