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Recognised as Colour

#138A5A

  • #138A5A
  • Cyan
  • Dark
  • Nearest: Sea green

#138A5A is a cyan with RGB values 19, 138, 90 and HSL 156°, 76%, 31%. It is a dark colour, so black text on it reaches 4.8:1 contrast (AA for normal text). The nearest named colour is Sea green.

Colour values

#138A5A#138A5A
HEX#138A5A
RGBrgb(19, 138, 90)
RGB (0–1)0.0745, 0.5412, 0.3529
RGB percentages7.5%, 54.1%, 35.3%
HSLhsl(155.8, 75.8%, 30.8%)
HSV / HSBhsv(155.8, 86.2%, 54.1%)
CMYK86.2%, 0%, 34.8%, 45.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,280,602
CSS custom property--colour: #138A5A;

Brightness & contrast

Relative luminance0.19054WCAG 2.x, 0 is black and 1 is white
Perceived brightness110.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.81:1
Contrast with white4.37:1WCAG normal text: Fail
Contrast with black4.81:1WCAG normal text: AA
Greyscale equivalent#6D6D6D
Inverted#EC75A5

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#887F57no red cones; affects about 1% of men; ΔE 40.1 from the original
Deuteranopia#7B755Dno green cones; the most common form, about 1% of men; ΔE 40.8 from the original
Tritanopia#00897Dno blue cones; rare, and affects men and women equally; ΔE 21.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.37:1WCAG large text: AA
Contrast with black, large text4.81:1WCAG large text: AAA

Named colours

Sea green · ΔE 4.1Medium seagreen · ΔE 17.1Medium aquamarine · ΔE 26.8Light seagreen · ΔE 28.4Dark seagreen · ΔE 28.4Dark olivegreen · ΔE 28.6
Nearest named CSS colourSea green (#2E8B57)ΔE 4.1, a close match
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8A1343
Analogous#138A1E, #137F8A
Triadic#5A138A, #8A5A13
Split complementary#8A137F, #8A1E13
Tetradic#1E138A, #8A1343, #7F8A13

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7CEDBF
Lighter +30%#4FE7AA
Lighter +20%#22E194
Lighter +10%#19B777
Darker −10%#0D5D3D
Darker −20%#073020
Darker −30%#000402
Darker −40%#000000
More saturated +25%#009D5E
Less saturated −25%#277656

Channel breakdown

R19
G138
B90
Red19 (7.5%)
Green138 (54.1%)
Blue90 (35.3%)
Hue155.8°
Saturation (HSL)75.8%
Lightness30.78%
Dominant channelGreen
Hex per channelR 13 · G 8A · B 5A

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Every value on this page was computed from “138a5a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.