#178A21#178A21

#178A21 is a mid, vivid green. Relative luminance 0.185; OKLCH L 55.3% C 0.171 H 143.7°. Best body text is #000000 at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#178A21
RGB	rgb(23, 138, 33)
HSL	hsl(125, 71%, 32%)
HSV	hsv(125, 83%, 54%)
CMYK	cmyk(83.3%, 0%, 76.1%, 45.9%)
CIE-LAB	lab(50.06, -50.95, 44.79)
CIE-LCH	lch(50.06, 67.84, 138.68°)
OKLab	oklab(55.28% -0.1378 0.1013)
OKLCH	oklch(55.28% 0.171 143.7)
XYZ	xyz(9.7157, 18.4677, 4.4911)
Luminance	0.1847 (WCAG relative)
Temperature	neutral
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#178A21 #8A1780

analogous

#478A17 #178A21 #178A5B

triadic

#178A21 #21178A #8A2117

tetradic

#178A21 #17478A #8A1780 #8A5B17

square

#178A21 #17478A #8A1780 #8A5B17

split-complementary

#178A21 #5B178A #8A1747

monochromatic

#062108 #0E5614 #178A21 #20BE2E #3DDF4B

Accessibility & contrast

On white

4.47

#178A21 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.69

#178A21 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #178A21

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##178A21	#FFFFFF	#000000	##000000
##178A21	1.00	4.47	4.69	4.69
#FFFFFF	4.47	1.00	21.00	21.00
#000000	4.69	21.00	1.00	1.00
##000000	4.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8D7C0C

Deuteranopia (green-blind)

#81742C

Tritanopia (blue-blind)

#008676

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #178a21;
/* rgb */ color: rgb(23, 138, 33);
/* oklch */ color: oklch(55.3% 0.171 143.7);

Tailwind

colors: {
  custom: {
    50: '#6cad64',
    500: '#178a21',
    950: '#000000',
  },
}

SCSS

$custom: #178a21;
$custom-light: #6cad64;
$custom-dark: #000000;

JSON

{
  "hex": "#178a21",
  "rgb": {
    "r": 23,
    "g": 138,
    "b": 33
  },
  "hsl": {
    "h": 125.217,
    "s": 71.429,
    "l": 31.569
  },
  "oklch": {
    "l": 0.5528,
    "c": 0.17106,
    "h": 143.7
  },
  "luminance": 0.18469
}

Semantic roles & 50–950 ramp

primary

#178A21

secondary

#BE3FB3

accent

#3ADEEE

background

#F7FAF6

surface

#EDF4EB

border

#C8CEC6

text

#081006

muted

#7B7F7A

Preview Lab

Preview with #178A21

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

Preview Lab → · Contrast checker → · Palette generator →