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Recognised as Colour

#218B7A

  • #218B7A
  • Cyan
  • Dark
  • Nearest: Dark cyan

#218B7A is a cyan with RGB values 33, 139, 122 and HSL 170°, 62%, 34%. It is a dark colour, so black text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Dark cyan.

Colour values

#218B7A#218B7A
HEX#218B7A
RGBrgb(33, 139, 122)
RGB (0–1)0.1294, 0.5451, 0.4784
RGB percentages12.9%, 54.5%, 47.8%
HSLhsl(170.4, 61.6%, 33.7%)
HSV / HSBhsv(170.4, 76.3%, 54.5%)
CMYK76.3%, 0%, 12.2%, 45.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,198,394
CSS custom property--colour: #218B7A;

Brightness & contrast

Relative luminance0.20194WCAG 2.x, 0 is black and 1 is white
Perceived brightness115.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.04:1
Contrast with white4.17:1WCAG normal text: Fail
Contrast with black5.04:1WCAG normal text: AA
Greyscale equivalent#737373
Inverted#DE7485

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#858279no red cones; affects about 1% of men; ΔE 33.1 from the original
Deuteranopia#77787Bno green cones; the most common form, about 1% of men; ΔE 33.7 from the original
Tritanopia#008D86no blue cones; rare, and affects men and women equally; ΔE 6.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.17:1WCAG large text: AA
Contrast with black, large text5.04:1WCAG large text: AAA

Named colours

Dark cyan · ΔE 10Teal · ΔE 10.9Light seagreen · ΔE 16Cadetblue · ΔE 18.3Sea green · ΔE 20.4Medium aquamarine · ΔE 25.3
Nearest named CSS colourDark cyan (#008B8B)ΔE 10.05, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8B2132
Analogous#218B45, #21678B
Triadic#7A218B, #8B7A21
Split complementary#8B2167, #8B4521
Tetradic#45218B, #8B2132, #678B21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#93E5D8
Lighter +30%#69DCC9
Lighter +20%#40D2BA
Lighter +10%#2BB49E
Darker −10%#176256
Darker −20%#0D3932
Darker −30%#040F0D
Darker −40%#000000
More saturated +25%#0CA089
Less saturated −25%#36756B

Channel breakdown

R33
G139
B122
Red33 (12.9%)
Green139 (54.5%)
Blue122 (47.8%)
Hue170.38°
Saturation (HSL)61.63%
Lightness33.73%
Dominant channelGreen
Hex per channelR 21 · G 8B · B 7A

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Every value on this page was computed from “218b7a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.