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Recognised as Colour

#03373F

  • #03373F
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#03373F is a cyan with RGB values 3, 55, 63 and HSL 188°, 91%, 13%. It is a dark colour, so white text on it reaches 12.9:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#03373F#03373F
HEX#03373F
RGBrgb(3, 55, 63)
RGB (0–1)0.0118, 0.2157, 0.2471
RGB percentages1.2%, 21.6%, 24.7%
HSLhsl(188, 90.9%, 12.9%)
HSV / HSBhsv(188, 95.2%, 24.7%)
CMYK95.2%, 12.7%, 0%, 75.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer210,751
CSS custom property--colour: #03373F;

Brightness & contrast

Relative luminance0.03111WCAG 2.x, 0 is black and 1 is white
Perceived brightness47.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.95:1
Contrast with white12.95:1WCAG normal text: AAA
Contrast with black1.62:1WCAG normal text: Fail
Greyscale equivalent#2D2D2D
Inverted#FCC8C0

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#31353Fno red cones; affects about 1% of men; ΔE 13.9 from the original
Deuteranopia#292F3Fno green cones; the most common form, about 1% of men; ΔE 14.7 from the original
Tritanopia#003A39no blue cones; rare, and affects men and women equally; ΔE 7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.95:1WCAG large text: AAA
Contrast with black, large text1.62:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 12.3Black · ΔE 25.9Dim grey · ΔE 28.7Teal · ΔE 32.2Slate grey · ΔE 34Dark cyan · ΔE 36.5
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 12.29, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3F0B03
Analogous#033F29, #03193F
Triadic#3F0337, #373F03
Split complementary#3F0319, #3F2903
Tetradic#29033F, #3F0B03, #193F03

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#1AD7F4
Lighter +30%#0AB7D1
Lighter +20%#088CA0
Lighter +10%#056270
Darker −10%#010D0E
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#003942
Less saturated −25%#0B3137

Channel breakdown

R3
G55
B63
Red3 (1.2%)
Green55 (21.6%)
Blue63 (24.7%)
Hue188°
Saturation (HSL)90.91%
Lightness12.94%
Dominant channelBlue
Hex per channelR 03 · G 37 · B 3F

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Every value on this page was computed from “03373f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.