#637A18#637A18

#637A18 is a mid, vivid yellow-green. Relative luminance 0.166; OKLCH L 54.2% C 0.122 H 122.5°. Best body text is #FFFFFF at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#637A18
RGB	rgb(99, 122, 24)
HSL	hsl(74, 67%, 29%)
HSV	hsv(74, 80%, 48%)
CMYK	cmyk(18.9%, 0%, 80.3%, 52.2%)
CIE-LAB	lab(47.80, -22.30, 46.84)
CIE-LCH	lch(47.80, 51.88, 115.46°)
OKLab	oklab(54.24% -0.0656 0.103)
OKLCH	oklch(54.24% 0.122 122.5)
XYZ	xyz(12.2702, 16.6376, 3.4289)
Luminance	0.1664 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637A18 #2F187A

analogous

#7A6018 #637A18 #327A18

triadic

#637A18 #18637A #7A1863

tetradic

#637A18 #187A60 #2F187A #7A1832

square

#637A18 #187A60 #2F187A #7A1832

split-complementary

#637A18 #18327A #60187A

monochromatic

#151A05 #39470E #637A18 #8CAD22 #B1D735

Accessibility & contrast

On white

4.85

#637A18 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.33

#637A18 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #637A18

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637A18	#FFFFFF	#000000	##FFFFFF
##637A18	1.00	4.85	4.33	4.85
#FFFFFF	4.85	1.00	21.00	1.00
#000000	4.33	21.00	1.00	21.00
##FFFFFF	4.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#827200

Deuteranopia (green-blind)

#7F7122

Tritanopia (blue-blind)

#697368

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #637a18;
/* rgb */ color: rgb(99, 122, 24);
/* oklch */ color: oklch(54.2% 0.122 122.5);

Tailwind

colors: {
  custom: {
    50: '#93a05e',
    500: '#637a18',
    950: '#000000',
  },
}

SCSS

$custom: #637a18;
$custom-light: #93a05e;
$custom-dark: #000000;

JSON

{
  "hex": "#637a18",
  "rgb": {
    "r": 99,
    "g": 122,
    "b": 24
  },
  "hsl": {
    "h": 74.082,
    "s": 67.123,
    "l": 28.627
  },
  "oklch": {
    "l": 0.54242,
    "c": 0.12214,
    "h": 122.5
  },
  "luminance": 0.16638
}

Semantic roles & 50–950 ramp

primary

#637A18

secondary

#593FAF

accent

#3EEA66

background

#F9F9F5

surface

#F2F2E9

border

#CCCCC5

text

#0D0E05

muted

#7E7E79

Preview Lab

Preview with #637A18

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

Preview Lab → · Contrast checker → · Palette generator →