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Colour

#003A51

  • #003A51
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#003A51 is a cyan with RGB values 0, 58, 81 and HSL 197°, 100%, 16%. It is a dark colour, so white text on it reaches 12.2:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#003A51#003A51
HEX#003A51
RGBrgb(0, 58, 81)
RGB (0–1)0, 0.2275, 0.3176
RGB percentages0%, 22.7%, 31.8%
HSLhsl(197, 100%, 15.9%)
HSV / HSBhsv(197, 100%, 31.8%)
CMYK100%, 28.4%, 0%, 68.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer14,929
CSS custom property--colour: #003A51;

Brightness & contrast

Relative luminance0.0362WCAG 2.x, 0 is black and 1 is white
Perceived brightness52.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.18:1
Contrast with white12.18:1WCAG normal text: AAA
Contrast with black1.72:1WCAG normal text: Fail
Greyscale equivalent#2F2F2F
Inverted#FFC5AE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2E3952no red cones; affects about 1% of men; ΔE 10.7 from the original
Deuteranopia#243251no green cones; the most common form, about 1% of men; ΔE 12.1 from the original
Tritanopia#004042no blue cones; rare, and affects men and women equally; ΔE 15.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.18:1WCAG large text: AAA
Contrast with black, large text1.72:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 18Dim grey · ΔE 29.9Black · ΔE 30.1Slate grey · ΔE 32Steel blue · ΔE 33.1Light slate grey · ΔE 34.8
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 17.95, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#511700
Analogous#005140, #001151
Triadic#51003A, #3A5100
Split complementary#510011, #514000
Tetradic#400051, #511700, #115100

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#1EBFFF
Lighter +30%#00A8EA
Lighter +20%#0083B7
Lighter +10%#005F84
Darker −10%#00151E
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#003A51
Less saturated −25%#0A3647

Channel breakdown

R0
G58
B81
Red0 (0%)
Green58 (22.7%)
Blue81 (31.8%)
Hue197.04°
Saturation (HSL)100%
Lightness15.88%
Dominant channelBlue
Hex per channelR 00 · G 3A · B 51

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Every value on this page was computed from “003a51” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.