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Recognised as Colour

#218CAF

  • #218CAF
  • Cyan
  • Dark
  • Nearest: Steel blue

#218CAF is a cyan with RGB values 33, 140, 175 and HSL 195°, 68%, 41%. It is a dark colour, so black text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#218CAF#218CAF
HEX#218CAF
RGBrgb(33, 140, 175)
RGB (0–1)0.1294, 0.549, 0.6863
RGB percentages12.9%, 54.9%, 68.6%
HSLhsl(194.8, 68.3%, 40.8%)
HSV / HSBhsv(194.8, 81.1%, 68.6%)
CMYK81.1%, 20%, 0%, 31.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,198,703
CSS custom property--colour: #218CAF;

Brightness & contrast

Relative luminance0.22175WCAG 2.x, 0 is black and 1 is white
Perceived brightness123.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.43:1
Contrast with white3.86:1WCAG normal text: Fail
Contrast with black5.43:1WCAG normal text: AA
Greyscale equivalent#787878
Inverted#DE7350

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#7989B1no red cones; affects about 1% of men; ΔE 21.3 from the original
Deuteranopia#667CAFno green cones; the most common form, about 1% of men; ΔE 22.6 from the original
Tritanopia#009697no blue cones; rare, and affects men and women equally; ΔE 22.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.86:1WCAG large text: AA
Contrast with black, large text5.43:1WCAG large text: AAA

Named colours

Steel blue · ΔE 14Cadetblue · ΔE 20.7Light slate grey · ΔE 21.4Slate grey · ΔE 21.9Dark cyan · ΔE 22.5Teal · ΔE 22.6
Nearest named CSS colourSteel blue (#4682B4)ΔE 14.05, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AF4421
Analogous#21AF8B, #2145AF
Triadic#AF218C, #8CAF21
Split complementary#AF2145, #AF8B21
Tetradic#8B21AF, #AF4421, #45AF21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#ADDFEF
Lighter +30%#82CEE7
Lighter +20%#57BEDF
Lighter +10%#2CADD7
Darker −10%#196A84
Darker −20%#114759
Darker −30%#09252E
Darker −40%#010303
More saturated +25%#0799C9
Less saturated −25%#3B7F95

Channel breakdown

R33
G140
B175
Red33 (12.9%)
Green140 (54.9%)
Blue175 (68.6%)
Hue194.79°
Saturation (HSL)68.27%
Lightness40.78%
Dominant channelBlue
Hex per channelR 21 · G 8C · B AF

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Every value on this page was computed from “218caf” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.