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Recognised as Colour

#21674B

  • #21674B
  • Cyan
  • Dark
  • Nearest: Sea green

#21674B is a cyan with RGB values 33, 103, 75 and HSL 156°, 51%, 27%. It is a dark colour, so white text on it reaches 6.8:1 contrast (AA for normal text). The nearest named colour is Sea green.

Colour values

#21674B#21674B
HEX#21674B
RGBrgb(33, 103, 75)
RGB (0–1)0.1294, 0.4039, 0.2941
RGB percentages12.9%, 40.4%, 29.4%
HSLhsl(156, 51.5%, 26.7%)
HSV / HSBhsv(156, 68%, 40.4%)
CMYK68%, 0%, 27.2%, 59.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,189,131
CSS custom property--colour: #21674B;

Brightness & contrast

Relative luminance0.10532WCAG 2.x, 0 is black and 1 is white
Perceived brightness84.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.76:1
Contrast with white6.76:1WCAG normal text: AA
Contrast with black3.11:1WCAG normal text: Fail
Greyscale equivalent#565656
Inverted#DE98B4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#655F49no red cones; affects about 1% of men; ΔE 27.9 from the original
Deuteranopia#5C594Dno green cones; the most common form, about 1% of men; ΔE 28.1 from the original
Tritanopia#00675Fno blue cones; rare, and affects men and women equally; ΔE 12.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.76:1WCAG large text: AAA
Contrast with black, large text3.11:1WCAG large text: AA

Named colours

Sea green · ΔE 19.7Teal · ΔE 20.4Dark cyan · ΔE 22.9Dark slate grey · ΔE 23.1Dark olivegreen · ΔE 23.7Cadetblue · ΔE 29.6
Nearest named CSS colourSea green (#2E8B57)ΔE 19.65, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#67213D
Analogous#216728, #216067
Triadic#4B2167, #674B21
Split complementary#672160, #672821
Tetradic#282167, #67213D, #606721

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7ED6B3
Lighter +30%#58C99C
Lighter +20%#3AB483
Lighter +10%#2D8E67
Darker −10%#15402F
Darker −20%#081A13
Darker −30%#000000
Darker −40%#000000
More saturated +25%#10784E
Less saturated −25%#325648

Channel breakdown

R33
G103
B75
Red33 (12.9%)
Green103 (40.4%)
Blue75 (29.4%)
Hue156°
Saturation (HSL)51.47%
Lightness26.67%
Dominant channelGreen
Hex per channelR 21 · G 67 · B 4B

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Every value on this page was computed from “21674b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.