Recognised as Colour

#128B57

#128B57
Cyan
Dark
Nearest: Sea green

#128B57 is a cyan with RGB values 18, 139, 87 and HSL 154°, 77%, 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

#128B57#128B57

HEX#128B57

RGBrgb(18, 139, 87)

RGB (0–1)0.0706, 0.5451, 0.3412

RGB percentages7.1%, 54.5%, 34.1%

HSLhsl(154.2, 77.1%, 30.8%)

HSV / HSBhsv(154.2, 87.1%, 54.5%)

CMYK87.1%, 0%, 37.4%, 45.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,215,319

CSS custom property--colour: #128B57;

Brightness & contrast

Relative luminance0.19282WCAG 2.x, 0 is black and 1 is white

Perceived brightness110.9 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 4.86:1

Contrast with white4.32:1WCAG normal text: Fail

Contrast with black4.86:1WCAG normal text: AA

Greyscale equivalent#6E6E6E

Inverted#ED74A8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#8A7F54no red cones; affects about 1% of men; ΔE 41.7 from the original

Deuteranopia#7C765Ano green cones; the most common form, about 1% of men; ΔE 41.3 from the original

Tritanopia#008A7Eno blue cones; rare, and affects men and women equally; ΔE 23.8 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text4.32:1WCAG large text: AA

Contrast with black, large text4.86:1WCAG large text: AAA

Named colours

Sea green · ΔE 4.1 Medium seagreen · ΔE 15.8 Forest green · ΔE 26.4 Dark green · ΔE 27 Medium aquamarine · ΔE 27.5 Dark olivegreen · ΔE 28.7

Nearest named CSS colourSea green (#2E8B57)ΔE 4.11, a close match

Hue familycyan

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#8B1246

Analogous#128B1B, #12838B

Triadic#57128B, #8B5712

Split complementary#8B1282, #8B1B12

Tetradic#1B128B, #8B1246, #838B12

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#7BEEBD

Lighter +30%#4EE8A6

Lighter +20%#21E28F

Lighter +10%#18B873

Darker −10%#0C5E3B

Darker −20%#06311E

Darker −30%#000402

Darker −40%#000000

More saturated +25%#009D5A

Less saturated −25%#267754

Channel breakdown

R18

G139

B87

Red18 (7.1%)

Green139 (54.5%)

Blue87 (34.1%)

Hue154.21°

Saturation (HSL)77.07%

Lightness30.78%

Dominant channelGreen

Hex per channelR 12 · G 8B · B 57

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#128B57

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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