#403F0B#403F0B

#403F0B is a dark, moderate yellow. Relative luminance 0.047; OKLCH L 35.8% C 0.070 H 108.3°. Best body text is #FFFFFF at 10.86:1 contrast (WCAG AA passes).

Color values

HEX	#403F0B
RGB	rgb(64, 63, 11)
HSL	hsl(59, 71%, 15%)
HSV	hsv(59, 83%, 25%)
CMYK	cmyk(0%, 1.6%, 82.8%, 74.9%)
CIE-LAB	lab(25.77, -6.82, 30.00)
CIE-LCH	lch(25.77, 30.77, 102.81°)
OKLab	oklab(35.78% -0.0219 0.0661)
OKLCH	oklch(35.78% 0.07 108.3)
XYZ	xyz(3.9524, 4.6693, 1.0096)
Luminance	0.0467 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403F0B #0B0C40

analogous

#40250B #403F0B #27400B

triadic

#403F0B #0B403F #3F0B40

tetradic

#403F0B #0B4025 #0B0C40 #400B27

square

#403F0B #0B4025 #0B0C40 #400B27

split-complementary

#403F0B #0B2740 #250B40

monochromatic

#1A1A04 #1A1A04 #403F0B #747214 #A8A61D

Accessibility & contrast

On white

10.86

#403F0B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#403F0B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403F0B

10.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403F0B	#FFFFFF	#000000	##FFFFFF
##403F0B	1.00	10.86	1.93	10.86
#FFFFFF	10.86	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#453C03

Deuteranopia (green-blind)

#463E0F

Tritanopia (blue-blind)

#453A35

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #403f0b;
/* rgb */ color: rgb(64, 63, 11);
/* oklch */ color: oklch(35.8% 0.070 108.3);

Tailwind

colors: {
  custom: {
    50: '#77734e',
    500: '#403f0b',
    950: '#000000',
  },
}

SCSS

$custom: #403f0b;
$custom-light: #77734e;
$custom-dark: #000000;

JSON

{
  "hex": "#403f0b",
  "rgb": {
    "r": 64,
    "g": 63,
    "b": 11
  },
  "hsl": {
    "h": 58.868,
    "s": 70.667,
    "l": 14.706
  },
  "oklch": {
    "l": 0.35775,
    "c": 0.06968,
    "h": 108.3
  },
  "luminance": 0.04669
}

Semantic roles & 50–950 ramp

primary

#403F0B

secondary

#2A2C7D

accent

#3EED3A

background

#F7F6F4

surface

#EDECE7

border

#C8C7C3

text

#090802

muted

#7B7B78

Preview Lab

Preview with #403F0B

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

Preview Lab → · Contrast checker → · Palette generator →