#40390A#40390A

#40390A is a dark, moderate yellow. Relative luminance 0.040; OKLCH L 34.2% C 0.064 H 100.5°. Best body text is #FFFFFF at 11.62:1 contrast (WCAG AA passes).

Color values

HEX	#40390A
RGB	rgb(64, 57, 10)
HSL	hsl(52, 73%, 15%)
HSV	hsv(52, 84%, 25%)
CMYK	cmyk(0%, 10.9%, 84.4%, 74.9%)
CIE-LAB	lab(23.80, -3.12, 28.51)
CIE-LCH	lch(23.80, 28.68, 96.25°)
OKLab	oklab(34.2% -0.0116 0.0628)
OKLCH	oklch(34.2% 0.064 100.5)
XYZ	xyz(3.6324, 4.0383, 0.8752)
Luminance	0.0404 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40390A #0A1140

analogous

#401E0A #40390A #2C400A

triadic

#40390A #0A4039 #390A40

tetradic

#40390A #0A401E #0A1140 #400A2C

square

#40390A #0A401E #0A1140 #400A2C

split-complementary

#40390A #0A2C40 #1E0A40

monochromatic

#1A1804 #1A1804 #40390A #756812 #AA971B

Accessibility & contrast

On white

11.62

#40390A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#40390A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40390A

11.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40390A	#FFFFFF	#000000	##FFFFFF
##40390A	1.00	11.62	1.81	11.62
#FFFFFF	11.62	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F3703

Deuteranopia (green-blind)

#413A0D

Tritanopia (blue-blind)

#463430

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #40390a;
/* rgb */ color: rgb(64, 57, 10);
/* oklch */ color: oklch(34.2% 0.064 100.5);

Tailwind

colors: {
  custom: {
    50: '#776f4d',
    500: '#40390a',
    950: '#000000',
  },
}

SCSS

$custom: #40390a;
$custom-light: #776f4d;
$custom-dark: #000000;

JSON

{
  "hex": "#40390a",
  "rgb": {
    "r": 64,
    "g": 57,
    "b": 10
  },
  "hsl": {
    "h": 52.222,
    "s": 72.973,
    "l": 14.51
  },
  "oklch": {
    "l": 0.34202,
    "c": 0.06391,
    "h": 100.5
  },
  "luminance": 0.04038
}

Semantic roles & 50–950 ramp

primary

#40390A

secondary

#29347D

accent

#50F038

background

#F7F6F4

surface

#EDECE7

border

#C8C7C3

text

#090701

muted

#7B7A77

Preview Lab

Preview with #40390A

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

Preview Lab → · Contrast checker → · Palette generator →