#637B2F#637B2F

#637B2F is a mid, moderate yellow-green. Relative luminance 0.170; OKLCH L 54.7% C 0.106 H 124.6°. Best body text is #FFFFFF at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#637B2F
RGB	rgb(99, 123, 47)
HSL	hsl(79, 45%, 33%)
HSV	hsv(79, 62%, 48%)
CMYK	cmyk(19.5%, 0%, 61.8%, 51.8%)
CIE-LAB	lab(48.29, -21.21, 37.80)
CIE-LCH	lch(48.29, 43.35, 119.30°)
OKLab	oklab(54.69% -0.0604 0.0876)
OKLCH	oklch(54.69% 0.106 124.6)
XYZ	xyz(12.7417, 17.0237, 5.3034)
Luminance	0.1702 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637B2F #472F7B

analogous

#7B6D2F #637B2F #3D7B2F

triadic

#637B2F #2F637B #7B2F63

tetradic

#637B2F #2F7B6D #472F7B #7B2F3D

square

#637B2F #2F7B6D #472F7B #7B2F3D

split-complementary

#637B2F #2F3D7B #6D2F7B

monochromatic

#1C220D #3F4F1E #637B2F #87A740 #A4C362

Accessibility & contrast

On white

4.77

#637B2F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.40

#637B2F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #637B2F

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637B2F	#FFFFFF	#000000	##FFFFFF
##637B2F	1.00	4.77	4.40	4.77
#FFFFFF	4.77	1.00	21.00	1.00
#000000	4.40	21.00	1.00	21.00
##FFFFFF	4.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#827327

Deuteranopia (green-blind)

#7E7234

Tritanopia (blue-blind)

#67756B

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #637b2f;
/* rgb */ color: rgb(99, 123, 47);
/* oklch */ color: oklch(54.7% 0.106 124.6);

Tailwind

colors: {
  custom: {
    50: '#91a16b',
    500: '#637b2f',
    950: '#000000',
  },
}

SCSS

$custom: #637b2f;
$custom-light: #91a16b;
$custom-dark: #000000;

JSON

{
  "hex": "#637b2f",
  "rgb": {
    "r": 99,
    "g": 123,
    "b": 47
  },
  "hsl": {
    "h": 78.947,
    "s": 44.706,
    "l": 33.333
  },
  "oklch": {
    "l": 0.54694,
    "c": 0.10642,
    "h": 124.6
  },
  "luminance": 0.17024
}

Semantic roles & 50–950 ramp

primary

#637B2F

secondary

#755CAA

accent

#53D47C

background

#F9F9F6

surface

#F1F2EB

border

#CBCCC6

text

#0D0F07

muted

#7E7E7A

Preview Lab

Preview with #637B2F

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

Preview Lab → · Contrast checker → · Palette generator →