#646B1B#646B1B

#646B1B is a mid, moderate yellow. Relative luminance 0.133; OKLCH L 50.6% C 0.101 H 114.4°. Best body text is #FFFFFF at 5.74:1 contrast (WCAG AA passes).

Color values

HEX	#646B1B
RGB	rgb(100, 107, 27)
HSL	hsl(65, 60%, 26%)
HSV	hsv(65, 75%, 42%)
CMYK	cmyk(6.5%, 0%, 74.8%, 58%)
CIE-LAB	lab(43.22, -13.74, 41.42)
CIE-LCH	lch(43.22, 43.64, 108.35°)
OKLab	oklab(50.58% -0.0418 0.0921)
OKLCH	oklch(50.58% 0.101 114.4)
XYZ	xyz(10.7114, 13.3040, 3.0404)
Luminance	0.1330 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646B1B #221B6B

analogous

#6B4A1B #646B1B #3C6B1B

triadic

#646B1B #1B646B #6B1B64

tetradic

#646B1B #1B6B4A #221B6B #6B1B3C

square

#646B1B #1B6B4A #221B6B #6B1B3C

split-complementary

#646B1B #1B3C6B #4A1B6B

monochromatic

#171806 #363A0F #646B1B #929C27 #BFCC35

Accessibility & contrast

On white

5.74

#646B1B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.66

#646B1B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646B1B

5.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646B1B	#FFFFFF	#000000	##FFFFFF
##646B1B	1.00	5.74	3.66	5.74
#FFFFFF	5.74	1.00	21.00	1.00
#000000	3.66	21.00	1.00	21.00
##FFFFFF	5.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#73650D

Deuteranopia (green-blind)

#736721

Tritanopia (blue-blind)

#6B645B

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #646b1b;
/* rgb */ color: rgb(100, 107, 27);
/* oklch */ color: oklch(50.6% 0.101 114.4);

Tailwind

colors: {
  custom: {
    50: '#93955d',
    500: '#646b1b',
    950: '#000000',
  },
}

SCSS

$custom: #646b1b;
$custom-light: #93955d;
$custom-dark: #000000;

JSON

{
  "hex": "#646b1b",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 27
  },
  "hsl": {
    "h": 65.25,
    "s": 59.701,
    "l": 26.275
  },
  "oklch": {
    "l": 0.50578,
    "c": 0.10114,
    "h": 114.4
  },
  "luminance": 0.13304
}

Semantic roles & 50–950 ramp

primary

#646B1B

secondary

#4A42A0

accent

#45E353

background

#F9F9F5

surface

#F2F1E9

border

#CCCBC5

text

#0D0D04

muted

#7E7E79

Preview Lab

Preview with #646B1B

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

Preview Lab → · Contrast checker → · Palette generator →