#40370C#40370C

#40370C is a dark, moderate yellow. Relative luminance 0.038; OKLCH L 33.7% C 0.061 H 97.0°. Best body text is #FFFFFF at 11.87:1 contrast (WCAG AA passes).

Color values

HEX	#40370C
RGB	rgb(64, 55, 12)
HSL	hsl(50, 68%, 15%)
HSV	hsv(50, 81%, 25%)
CMYK	cmyk(0%, 14.1%, 81.2%, 74.9%)
CIE-LAB	lab(23.17, -1.73, 27.01)
CIE-LCH	lch(23.17, 27.07, 93.67°)
OKLab	oklab(33.71% -0.0074 0.0601)
OKLCH	oklch(33.71% 0.061 97)
XYZ	xyz(3.5471, 3.8491, 0.9039)
Luminance	0.0385 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40370C #0C1540

analogous

#401D0C #40370C #2F400C

triadic

#40370C #0C4037 #370C40

tetradic

#40370C #0C401D #0C1540 #400C2F

square

#40370C #0C401D #0C1540 #400C2F

split-complementary

#40370C #0C2F40 #1D0C40

monochromatic

#1A1605 #1A1605 #40370C #746316 #A7901F

Accessibility & contrast

On white

11.87

#40370C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#40370C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40370C

11.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40370C	#FFFFFF	#000000	##FFFFFF
##40370C	1.00	11.87	1.77	11.87
#FFFFFF	11.87	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D3606

Deuteranopia (green-blind)

#40380F

Tritanopia (blue-blind)

#46322E

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #40370c;
/* rgb */ color: rgb(64, 55, 12);
/* oklch */ color: oklch(33.7% 0.061 97.0);

Tailwind

colors: {
  custom: {
    50: '#776d4e',
    500: '#40370c',
    950: '#000000',
  },
}

SCSS

$custom: #40370c;
$custom-light: #776d4e;
$custom-dark: #000000;

JSON

{
  "hex": "#40370c",
  "rgb": {
    "r": 64,
    "g": 55,
    "b": 12
  },
  "hsl": {
    "h": 49.615,
    "s": 68.421,
    "l": 14.902
  },
  "oklch": {
    "l": 0.33707,
    "c": 0.06053,
    "h": 97
  },
  "luminance": 0.03849
}

Semantic roles & 50–950 ramp

primary

#40370C

secondary

#2C3A7C

accent

#5BEB3D

background

#F7F6F4

surface

#EDEBE7

border

#C8C6C3

text

#090701

muted

#7B7A77

Preview Lab

Preview with #40370C

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

Preview Lab → · Contrast checker → · Palette generator →