#645A1B#645A1B

#645A1B is a mid, moderate yellow. Relative luminance 0.101; OKLCH L 46.4% C 0.082 H 100.1°. Best body text is #FFFFFF at 6.95:1 contrast (WCAG AA passes).

Color values

HEX	#645A1B
RGB	rgb(100, 90, 27)
HSL	hsl(52, 57%, 25%)
HSV	hsv(52, 73%, 39%)
CMYK	cmyk(0%, 10%, 73%, 60.8%)
CIE-LAB	lab(38.02, -4.04, 36.25)
CIE-LCH	lch(38.02, 36.47, 96.36°)
OKLab	oklab(46.43% -0.0145 0.0812)
OKLCH	oklch(46.43% 0.082 100.1)
XYZ	xyz(9.1099, 10.1012, 2.5066)
Luminance	0.1010 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645A1B #1B2564

analogous

#64361B #645A1B #49641B

triadic

#645A1B #1B645A #5A1B64

tetradic

#645A1B #1B6436 #1B2564 #641B49

square

#645A1B #1B6436 #1B2564 #641B49

split-complementary

#645A1B #1B4964 #361B64

monochromatic

#181607 #342F0E #645A1B #948528 #C4B135

Accessibility & contrast

On white

6.95

#645A1B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.02

#645A1B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645A1B

6.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645A1B	#FFFFFF	#000000	##FFFFFF
##645A1B	1.00	6.95	3.02	6.95
#FFFFFF	6.95	1.00	21.00	1.00
#000000	3.02	21.00	1.00	21.00
##FFFFFF	6.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#635712

Deuteranopia (green-blind)

#665B1F

Tritanopia (blue-blind)

#6C534D

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #645a1b;
/* rgb */ color: rgb(100, 90, 27);
/* oklch */ color: oklch(46.4% 0.082 100.1);

Tailwind

colors: {
  custom: {
    50: '#93885b',
    500: '#645a1b',
    950: '#000000',
  },
}

SCSS

$custom: #645a1b;
$custom-light: #93885b;
$custom-dark: #000000;

JSON

{
  "hex": "#645a1b",
  "rgb": {
    "r": 100,
    "g": 90,
    "b": 27
  },
  "hsl": {
    "h": 51.781,
    "s": 57.48,
    "l": 24.902
  },
  "oklch": {
    "l": 0.46435,
    "c": 0.08249,
    "h": 100.1
  },
  "luminance": 0.10101
}

Semantic roles & 50–950 ramp

primary

#645A1B

secondary

#414D99

accent

#5CE147

background

#F9F8F5

surface

#F2EFE9

border

#CCCAC5

text

#0D0B04

muted

#7E7C79

Preview Lab

Preview with #645A1B

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

Preview Lab → · Contrast checker → · Palette generator →