#638E1F#638E1F

#638E1F is a mid, vivid yellow-green. Relative luminance 0.221; OKLCH L 59.4% C 0.144 H 129.0°. Best body text is #000000 at 5.42:1 contrast (WCAG AA passes).

Color values

HEX	#638E1F
RGB	rgb(99, 142, 31)
HSL	hsl(83, 64%, 34%)
HSV	hsv(83, 78%, 56%)
CMYK	cmyk(30.3%, 0%, 78.2%, 44.3%)
CIE-LAB	lab(54.13, -31.69, 50.42)
CIE-LCH	lch(54.13, 59.55, 122.15°)
OKLab	oklab(59.39% -0.0906 0.1118)
OKLCH	oklch(59.39% 0.144 129)
XYZ	xyz(15.0659, 22.0972, 4.7675)
Luminance	0.2210 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638E1F #4A1F8E

analogous

#8E821F #638E1F #2C8E1F

triadic

#638E1F #1F638E #8E1F63

tetradic

#638E1F #1F8E82 #4A1F8E #8E1F2C

square

#638E1F #1F8E82 #4A1F8E #8E1F2C

split-complementary

#638E1F #1F2C8E #821F8E

monochromatic

#1D2A09 #405C14 #638E1F #86C02A #A3D94F

Accessibility & contrast

On white

3.87

#638E1F on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.42

#638E1F on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638E1F

5.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638E1F	#FFFFFF	#000000	##000000
##638E1F	1.00	3.87	5.42	5.42
#FFFFFF	3.87	1.00	21.00	21.00
#000000	5.42	21.00	1.00	1.00
##000000	5.42	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#958303

Deuteranopia (green-blind)

#8F802A

Tritanopia (blue-blind)

#668779

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #638e1f;
/* rgb */ color: rgb(99, 142, 31);
/* oklch */ color: oklch(59.4% 0.144 129.0);

Tailwind

colors: {
  custom: {
    50: '#93af64',
    500: '#638e1f',
    950: '#000000',
  },
}

SCSS

$custom: #638e1f;
$custom-light: #93af64;
$custom-dark: #000000;

JSON

{
  "hex": "#638e1f",
  "rgb": {
    "r": 99,
    "g": 142,
    "b": 31
  },
  "hsl": {
    "h": 83.243,
    "s": 64.162,
    "l": 33.922
  },
  "oklch": {
    "l": 0.59388,
    "c": 0.14389,
    "h": 129
  },
  "luminance": 0.22098
}

Semantic roles & 50–950 ramp

primary

#638E1F

secondary

#784DBB

accent

#41E781

background

#F9FAF6

surface

#F2F4EB

border

#CCCEC6

text

#0D1006

muted

#7E7F7A

Preview Lab

Preview with #638E1F

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

Preview Lab → · Contrast checker → · Palette generator →