#638B1F#638B1F

#638B1F is a mid, vivid yellow-green. Relative luminance 0.212; OKLCH L 58.6% C 0.140 H 128.3°. Best body text is #000000 at 5.24:1 contrast (WCAG AA passes).

Color values

HEX	#638B1F
RGB	rgb(99, 139, 31)
HSL	hsl(82, 64%, 33%)
HSV	hsv(82, 78%, 55%)
CMYK	cmyk(28.8%, 0%, 77.7%, 45.5%)
CIE-LAB	lab(53.19, -30.28, 49.52)
CIE-LCH	lch(53.19, 58.05, 121.44°)
OKLab	oklab(58.62% -0.0868 0.1099)
OKLCH	oklch(58.62% 0.14 128.3)
XYZ	xyz(14.6255, 21.2165, 4.6207)
Luminance	0.2122 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638B1F #471F8B

analogous

#8B7D1F #638B1F #2D8B1F

triadic

#638B1F #1F638B #8B1F63

tetradic

#638B1F #1F8B7D #471F8B #8B1F2D

square

#638B1F #1F8B7D #471F8B #8B1F2D

split-complementary

#638B1F #1F2D8B #7D1F8B

monochromatic

#1C2709 #3F5914 #638B1F #87BD2A #A4D74D

Accessibility & contrast

On white

4.01

#638B1F on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.24

#638B1F on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638B1F

5.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638B1F	#FFFFFF	#000000	##000000
##638B1F	1.00	4.01	5.24	5.24
#FFFFFF	4.01	1.00	21.00	21.00
#000000	5.24	21.00	1.00	1.00
##000000	5.24	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#928105

Deuteranopia (green-blind)

#8D7E2A

Tritanopia (blue-blind)

#678477

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #638b1f;
/* rgb */ color: rgb(99, 139, 31);
/* oklch */ color: oklch(58.6% 0.140 128.3);

Tailwind

colors: {
  custom: {
    50: '#93ad64',
    500: '#638b1f',
    950: '#000000',
  },
}

SCSS

$custom: #638b1f;
$custom-light: #93ad64;
$custom-dark: #000000;

JSON

{
  "hex": "#638b1f",
  "rgb": {
    "r": 99,
    "g": 139,
    "b": 31
  },
  "hsl": {
    "h": 82.222,
    "s": 63.529,
    "l": 33.333
  },
  "oklch": {
    "l": 0.5862,
    "c": 0.14003,
    "h": 128.3
  },
  "luminance": 0.21217
}

Semantic roles & 50–950 ramp

primary

#638B1F

secondary

#754CBA

accent

#41E77E

background

#F9FAF6

surface

#F2F4EB

border

#CCCEC6

text

#0D1006

muted

#7E7F7A

Preview Lab

Preview with #638B1F

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

Preview Lab → · Contrast checker → · Palette generator →