#645F1B#645F1B

#645F1B is a mid, moderate yellow. Relative luminance 0.110; OKLCH L 47.6% C 0.087 H 105.1°. Best body text is #FFFFFF at 6.57:1 contrast (WCAG AA passes).

Color values

HEX	#645F1B
RGB	rgb(100, 95, 27)
HSL	hsl(56, 57%, 25%)
HSV	hsv(56, 73%, 39%)
CMYK	cmyk(0%, 5%, 73%, 60.8%)
CIE-LAB	lab(39.54, -6.96, 37.78)
CIE-LCH	lch(39.54, 38.41, 100.44°)
OKLab	oklab(47.64% -0.0228 0.0844)
OKLCH	oklch(47.64% 0.087 105.1)
XYZ	xyz(9.5459, 10.9732, 2.6519)
Luminance	0.1097 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645F1B #1B2064

analogous

#643A1B #645F1B #45641B

triadic

#645F1B #1B645F #5F1B64

tetradic

#645F1B #1B643A #1B2064 #641B45

square

#645F1B #1B643A #1B2064 #641B45

split-complementary

#645F1B #1B4564 #3A1B64

monochromatic

#181707 #34310E #645F1B #948D28 #C4BB35

Accessibility & contrast

On white

6.57

#645F1B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.19

#645F1B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645F1B

6.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645F1B	#FFFFFF	#000000	##FFFFFF
##645F1B	1.00	6.57	3.19	6.57
#FFFFFF	6.57	1.00	21.00	1.00
#000000	3.19	21.00	1.00	21.00
##FFFFFF	6.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#685B11

Deuteranopia (green-blind)

#6A5E1F

Tritanopia (blue-blind)

#6C5851

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #645f1b;
/* rgb */ color: rgb(100, 95, 27);
/* oklch */ color: oklch(47.6% 0.087 105.1);

Tailwind

colors: {
  custom: {
    50: '#938c5c',
    500: '#645f1b',
    950: '#000000',
  },
}

SCSS

$custom: #645f1b;
$custom-light: #938c5c;
$custom-dark: #000000;

JSON

{
  "hex": "#645f1b",
  "rgb": {
    "r": 100,
    "g": 95,
    "b": 27
  },
  "hsl": {
    "h": 55.89,
    "s": 57.48,
    "l": 24.902
  },
  "oklch": {
    "l": 0.47636,
    "c": 0.08744,
    "h": 105.1
  },
  "luminance": 0.10973
}

Semantic roles & 50–950 ramp

primary

#645F1B

secondary

#414799

accent

#52E147

background

#F9F8F5

surface

#F2F0E9

border

#CCCBC5

text

#0D0C04

muted

#7E7D79

Preview Lab

Preview with #645F1B

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

Preview Lab → · Contrast checker → · Palette generator →