#40390B#40390B

#40390B is a dark, moderate yellow. Relative luminance 0.040; OKLCH L 34.2% C 0.063 H 100.3°. Best body text is #FFFFFF at 11.62:1 contrast (WCAG AA passes).

Color values

HEX	#40390B
RGB	rgb(64, 57, 11)
HSL	hsl(52, 71%, 15%)
HSV	hsv(52, 83%, 25%)
CMYK	cmyk(0%, 10.9%, 82.8%, 74.9%)
CIE-LAB	lab(23.81, -3.07, 28.10)
CIE-LCH	lch(23.81, 28.27, 96.23°)
OKLab	oklab(34.21% -0.0114 0.0622)
OKLCH	oklch(34.21% 0.063 100.3)
XYZ	xyz(3.6381, 4.0406, 0.9048)
Luminance	0.0404 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40390B #0B1240

analogous

#401E0B #40390B #2D400B

triadic

#40390B #0B4039 #390B40

tetradic

#40390B #0B401E #0B1240 #400B2D

square

#40390B #0B401E #0B1240 #400B2D

split-complementary

#40390B #0B2D40 #1E0B40

monochromatic

#1A1704 #1A1704 #40390B #746814 #A8961D

Accessibility & contrast

On white

11.62

#40390B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#40390B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40390B

11.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40390B	#FFFFFF	#000000	##FFFFFF
##40390B	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)

#3F3704

Deuteranopia (green-blind)

#413A0E

Tritanopia (blue-blind)

#463430

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #40390b;
/* rgb */ color: rgb(64, 57, 11);
/* oklch */ color: oklch(34.2% 0.063 100.3);

Tailwind

colors: {
  custom: {
    50: '#776f4e',
    500: '#40390b',
    950: '#000000',
  },
}

SCSS

$custom: #40390b;
$custom-light: #776f4e;
$custom-dark: #000000;

JSON

{
  "hex": "#40390b",
  "rgb": {
    "r": 64,
    "g": 57,
    "b": 11
  },
  "hsl": {
    "h": 52.075,
    "s": 70.667,
    "l": 14.706
  },
  "oklch": {
    "l": 0.34211,
    "c": 0.06318,
    "h": 100.3
  },
  "luminance": 0.0404
}

Semantic roles & 50–950 ramp

primary

#40390B

secondary

#2A357D

accent

#52ED3A

background

#F7F6F4

surface

#EDECE7

border

#C8C7C3

text

#090701

muted

#7B7A77

Preview Lab

Preview with #40390B

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

Preview Lab → · Contrast checker → · Palette generator →