#288B57#288B57

#288B57 is a mid, vivid green. Relative luminance 0.196; OKLCH L 56.7% C 0.121 H 155.8°. Best body text is #000000 at 4.92:1 contrast (WCAG AA passes).

Color values

HEX	#288B57
RGB	rgb(40, 139, 87)
HSL	hsl(148, 55%, 35%)
HSV	hsv(148, 71%, 55%)
CMYK	cmyk(71.2%, 0%, 37.4%, 45.5%)
CIE-LAB	lab(51.39, -40.83, 19.83)
CIE-LCH	lch(51.39, 45.39, 154.10°)
OKLab	oklab(56.69% -0.1105 0.0497)
OKLCH	oklch(56.69% 0.121 155.8)
XYZ	xyz(11.8269, 19.6032, 12.1755)
Luminance	0.1960 (WCAG relative)
Temperature	neutral
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#288B57 #8B285C

analogous

#2A8B28 #288B57 #288B88

triadic

#288B57 #57288B #8B5728

tetradic

#288B57 #282A8B #8B285C #8B8828

square

#288B57 #282A8B #8B285C #8B8828

split-complementary

#288B57 #88288B #8B282A

monochromatic

#0D2C1C #1A5B39 #288B57 #36BB75 #5DD094

Accessibility & contrast

On white

4.27

#288B57 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.92

#288B57 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #288B57

4.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##288B57	#FFFFFF	#000000	##000000
##288B57	1.00	4.27	4.92	4.92
#FFFFFF	4.27	1.00	21.00	21.00
#000000	4.92	21.00	1.00	1.00
##000000	4.92	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8A8054

Deuteranopia (green-blind)

#7E775A

Tritanopia (blue-blind)

#008A7E

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #288b57;
/* rgb */ color: rgb(40, 139, 87);
/* oklch */ color: oklch(56.7% 0.121 155.8);

Tailwind

colors: {
  custom: {
    50: '#70ae87',
    500: '#288b57',
    950: '#000000',
  },
}

SCSS

$custom: #288b57;
$custom-light: #70ae87;
$custom-dark: #000000;

JSON

{
  "hex": "#288b57",
  "rgb": {
    "r": 40,
    "g": 139,
    "b": 87
  },
  "hsl": {
    "h": 148.485,
    "s": 55.307,
    "l": 35.098
  },
  "oklch": {
    "l": 0.56688,
    "c": 0.12117,
    "h": 155.8
  },
  "luminance": 0.19604
}

Semantic roles & 50–950 ramp

primary

#288B57

secondary

#B6598A

accent

#4998DF

background

#F7FAF8

surface

#EDF4EF

border

#C8CECA

text

#08100B

muted

#7B7F7C

Preview Lab

Preview with #288B57

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →