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Recognised as Colour

#138B66

  • #138B66
  • Cyan
  • Dark
  • Nearest: Sea green

#138B66 is a cyan with RGB values 19, 139, 102 and HSL 162°, 76%, 31%. It is a dark colour, so black text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Sea green.

Colour values

#138B66#138B66
HEX#138B66
RGBrgb(19, 139, 102)
RGB (0–1)0.0745, 0.5451, 0.4
RGB percentages7.5%, 54.5%, 40%
HSLhsl(161.5, 75.9%, 31%)
HSV / HSBhsv(161.5, 86.3%, 54.5%)
CMYK86.3%, 0%, 26.6%, 45.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,280,870
CSS custom property--colour: #138B66;

Brightness & contrast

Relative luminance0.19563WCAG 2.x, 0 is black and 1 is white
Perceived brightness112.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.91:1
Contrast with white4.27:1WCAG normal text: Fail
Contrast with black4.91:1WCAG normal text: AA
Greyscale equivalent#6F6F6F
Inverted#EC7499

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#888064no red cones; affects about 1% of men; ΔE 38.8 from the original
Deuteranopia#7A7668no green cones; the most common form, about 1% of men; ΔE 39.2 from the original
Tritanopia#008B81no blue cones; rare, and affects men and women equally; ΔE 16.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.27:1WCAG large text: AA
Contrast with black, large text4.91:1WCAG large text: AAA

Named colours

Sea green · ΔE 8.9Medium seagreen · ΔE 20.8Dark cyan · ΔE 22.3Light seagreen · ΔE 22.9Teal · ΔE 22.9Medium aquamarine · ΔE 24.6
Nearest named CSS colourSea green (#2E8B57)ΔE 8.88, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8B1338
Analogous#138B2A, #13748B
Triadic#66138B, #8B6613
Split complementary#8B1374, #8B2A13
Tetradic#2A138B, #8B1338, #748B13

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7DEDCB
Lighter +30%#50E7B8
Lighter +20%#23E1A6
Lighter +10%#19B887
Darker −10%#0D5E45
Darker −20%#073124
Darker −30%#010403
Darker −40%#000000
More saturated +25%#009E6D
Less saturated −25%#27775E

Channel breakdown

R19
G139
B102
Red19 (7.5%)
Green139 (54.5%)
Blue102 (40%)
Hue161.5°
Saturation (HSL)75.95%
Lightness30.98%
Dominant channelGreen
Hex per channelR 13 · G 8B · B 66

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Every value on this page was computed from “138b66” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.