#557B18#557B18

#557B18 is a mid, vivid yellow-green. Relative luminance 0.162; OKLCH L 53.5% C 0.131 H 129.0°. Best body text is #FFFFFF at 4.96:1 contrast (WCAG AA passes).

Color values

HEX	#557B18
RGB	rgb(85, 123, 24)
HSL	hsl(83, 67%, 29%)
HSV	hsv(83, 80%, 48%)
CMYK	cmyk(30.9%, 0%, 80.5%, 51.8%)
CIE-LAB	lab(47.19, -28.74, 45.94)
CIE-LCH	lch(47.19, 54.19, 122.03°)
OKLab	oklab(53.5% -0.0823 0.1015)
OKLCH	oklch(53.5% 0.131 129)
XYZ	xyz(10.9941, 16.1629, 3.4045)
Luminance	0.1616 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557B18 #3E187B

analogous

#7B7018 #557B18 #247B18

triadic

#557B18 #18557B #7B1855

tetradic

#557B18 #187B70 #3E187B #7B1824

square

#557B18 #187B70 #3E187B #7B1824

split-complementary

#557B18 #18247B #70187B

monochromatic

#121A05 #32480E #557B18 #78AE22 #9AD836

Accessibility & contrast

On white

4.96

#557B18 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.23

#557B18 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #557B18

4.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557B18	#FFFFFF	#000000	##FFFFFF
##557B18	1.00	4.96	4.23	4.96
#FFFFFF	4.96	1.00	21.00	1.00
#000000	4.23	21.00	1.00	21.00
##FFFFFF	4.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#817200

Deuteranopia (green-blind)

#7C6F22

Tritanopia (blue-blind)

#587569

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #557b18;
/* rgb */ color: rgb(85, 123, 24);
/* oklch */ color: oklch(53.5% 0.131 129.0);

Tailwind

colors: {
  custom: {
    50: '#89a15e',
    500: '#557b18',
    950: '#000000',
  },
}

SCSS

$custom: #557b18;
$custom-light: #89a15e;
$custom-dark: #000000;

JSON

{
  "hex": "#557b18",
  "rgb": {
    "r": 85,
    "g": 123,
    "b": 24
  },
  "hsl": {
    "h": 83.03,
    "s": 67.347,
    "l": 28.824
  },
  "oklch": {
    "l": 0.53503,
    "c": 0.13067,
    "h": 129
  },
  "luminance": 0.16163
}

Semantic roles & 50–950 ramp

primary

#557B18

secondary

#6A3FB0

accent

#3EEA80

background

#F8F9F5

surface

#F0F2E9

border

#CBCCC5

text

#0C0F05

muted

#7D7E79

Preview Lab

Preview with #557B18

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

Preview Lab → · Contrast checker → · Palette generator →