#646B1F#646B1F

#646B1F is a mid, moderate yellow. Relative luminance 0.133; OKLCH L 50.6% C 0.098 H 114.5°. Best body text is #FFFFFF at 5.73:1 contrast (WCAG AA passes).

Color values

HEX	#646B1F
RGB	rgb(100, 107, 31)
HSL	hsl(66, 55%, 27%)
HSV	hsv(66, 71%, 42%)
CMYK	cmyk(6.5%, 0%, 71%, 58%)
CIE-LAB	lab(43.25, -13.49, 39.79)
CIE-LCH	lch(43.25, 42.01, 108.73°)
OKLab	oklab(50.61% -0.0407 0.0894)
OKLCH	oklch(50.61% 0.098 114.5)
XYZ	xyz(10.7608, 13.3238, 3.3009)
Luminance	0.1332 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646B1F #261F6B

analogous

#6B4C1F #646B1F #3E6B1F

triadic

#646B1F #1F646B #6B1F64

tetradic

#646B1F #1F6B4C #261F6B #6B1F3E

square

#646B1F #1F6B4C #261F6B #6B1F3E

split-complementary

#646B1F #1F3E6B #4C1F6B

monochromatic

#161807 #383C11 #646B1F #909A2D #BAC73D

Accessibility & contrast

On white

5.73

#646B1F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.66

#646B1F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646B1F

5.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646B1F	#FFFFFF	#000000	##FFFFFF
##646B1F	1.00	5.73	3.66	5.73
#FFFFFF	5.73	1.00	21.00	1.00
#000000	3.66	21.00	1.00	21.00
##FFFFFF	5.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#736614

Deuteranopia (green-blind)

#736725

Tritanopia (blue-blind)

#6B655C

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #646b1f;
/* rgb */ color: rgb(100, 107, 31);
/* oklch */ color: oklch(50.6% 0.098 114.5);

Tailwind

colors: {
  custom: {
    50: '#939560',
    500: '#646b1f',
    950: '#000000',
  },
}

SCSS

$custom: #646b1f;
$custom-light: #939560;
$custom-dark: #000000;

JSON

{
  "hex": "#646b1f",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 31
  },
  "hsl": {
    "h": 65.526,
    "s": 55.072,
    "l": 27.059
  },
  "oklch": {
    "l": 0.50611,
    "c": 0.09821,
    "h": 114.5
  },
  "luminance": 0.13324
}

Semantic roles & 50–950 ramp

primary

#646B1F

secondary

#4F479F

accent

#49DE57

background

#F9F9F5

surface

#F2F1EA

border

#CCCBC6

text

#0D0D05

muted

#7E7E79

Preview Lab

Preview with #646B1F

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

Preview Lab → · Contrast checker → · Palette generator →