#645E1F#645E1F

#645E1F is a mid, moderate yellow. Relative luminance 0.108; OKLCH L 47.4% C 0.083 H 103.9°. Best body text is #FFFFFF at 6.64:1 contrast (WCAG AA passes).

Color values

HEX	#645E1F
RGB	rgb(100, 94, 31)
HSL	hsl(55, 53%, 26%)
HSV	hsv(55, 69%, 39%)
CMYK	cmyk(0%, 6%, 69%, 60.8%)
CIE-LAB	lab(39.27, -6.12, 35.68)
CIE-LCH	lch(39.27, 36.20, 99.74°)
OKLab	oklab(47.43% -0.0199 0.0807)
OKLCH	oklch(47.43% 0.083 103.9)
XYZ	xyz(9.5059, 10.8140, 2.8826)
Luminance	0.1081 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645E1F #1F2564

analogous

#643B1F #645E1F #47641F

triadic

#645E1F #1F645E #5E1F64

tetradic

#645E1F #1F643B #1F2564 #641F47

square

#645E1F #1F643B #1F2564 #641F47

split-complementary

#645E1F #1F4764 #3B1F64

monochromatic

#171607 #353211 #645E1F #938A2D #C1B63C

Accessibility & contrast

On white

6.64

#645E1F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.16

#645E1F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645E1F

6.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645E1F	#FFFFFF	#000000	##FFFFFF
##645E1F	1.00	6.64	3.16	6.64
#FFFFFF	6.64	1.00	21.00	1.00
#000000	3.16	21.00	1.00	21.00
##FFFFFF	6.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#675B17

Deuteranopia (green-blind)

#695E23

Tritanopia (blue-blind)

#6C5751

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #645e1f;
/* rgb */ color: rgb(100, 94, 31);
/* oklch */ color: oklch(47.4% 0.083 103.9);

Tailwind

colors: {
  custom: {
    50: '#928b5e',
    500: '#645e1f',
    950: '#000000',
  },
}

SCSS

$custom: #645e1f;
$custom-light: #928b5e;
$custom-dark: #000000;

JSON

{
  "hex": "#645e1f",
  "rgb": {
    "r": 100,
    "g": 94,
    "b": 31
  },
  "hsl": {
    "h": 54.783,
    "s": 52.672,
    "l": 25.686
  },
  "oklch": {
    "l": 0.47432,
    "c": 0.08314,
    "h": 103.9
  },
  "luminance": 0.10814
}

Semantic roles & 50–950 ramp

primary

#645E1F

secondary

#464D98

accent

#58DC4C

background

#F9F8F5

surface

#F1F0E9

border

#CBCBC5

text

#0D0C04

muted

#7E7D79

Preview Lab

Preview with #645E1F

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

Preview Lab → · Contrast checker → · Palette generator →