#638C1B#638C1B

#638C1B is a mid, vivid yellow-green. Relative luminance 0.215; OKLCH L 58.9% C 0.143 H 128.3°. Best body text is #000000 at 5.30:1 contrast (WCAG AA passes).

Color values

HEX	#638C1B
RGB	rgb(99, 140, 27)
HSL	hsl(82, 68%, 33%)
HSV	hsv(82, 81%, 55%)
CMYK	cmyk(29.3%, 0%, 80.7%, 45.1%)
CIE-LAB	lab(53.48, -30.96, 51.11)
CIE-LCH	lch(53.48, 59.76, 121.20°)
OKLab	oklab(58.85% -0.0889 0.1126)
OKLCH	oklch(58.85% 0.143 128.3)
XYZ	xyz(14.7215, 21.4876, 4.4086)
Luminance	0.2149 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638C1B #441B8C

analogous

#8C7C1B #638C1B #2A8C1B

triadic

#638C1B #1B638C #8C1B63

tetradic

#638C1B #1B8C7C #441B8C #8C1B2A

square

#638C1B #1B8C7C #441B8C #8C1B2A

split-complementary

#638C1B #1B2A8C #7C1B8C

monochromatic

#1A2507 #3F5911 #638C1B #87BF25 #A5DB46

Accessibility & contrast

On white

3.96

#638C1B on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.30

#638C1B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638C1B

5.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638C1B	#FFFFFF	#000000	##000000
##638C1B	1.00	3.96	5.30	5.30
#FFFFFF	3.96	1.00	21.00	21.00
#000000	5.30	21.00	1.00	1.00
##000000	5.30	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#938200

Deuteranopia (green-blind)

#8E7F27

Tritanopia (blue-blind)

#678577

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #638c1b;
/* rgb */ color: rgb(99, 140, 27);
/* oklch */ color: oklch(58.9% 0.143 128.3);

Tailwind

colors: {
  custom: {
    50: '#93ae62',
    500: '#638c1b',
    950: '#000000',
  },
}

SCSS

$custom: #638c1b;
$custom-light: #93ae62;
$custom-dark: #000000;

JSON

{
  "hex": "#638c1b",
  "rgb": {
    "r": 99,
    "g": 140,
    "b": 27
  },
  "hsl": {
    "h": 81.77,
    "s": 67.665,
    "l": 32.745
  },
  "oklch": {
    "l": 0.58852,
    "c": 0.14346,
    "h": 128.3
  },
  "luminance": 0.21488
}

Semantic roles & 50–950 ramp

primary

#638C1B

secondary

#7146BD

accent

#3DEB7C

background

#F9FAF6

surface

#F2F4EB

border

#CCCEC6

text

#0D1006

muted

#7E7F7A

Preview Lab

Preview with #638C1B

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

Preview Lab → · Contrast checker → · Palette generator →