#40400B#40400B

#40400B is a dark, moderate yellow. Relative luminance 0.048; OKLCH L 36.0% C 0.071 H 109.5°. Best body text is #FFFFFF at 10.74:1 contrast (WCAG AA passes).

Color values

HEX	#40400B
RGB	rgb(64, 64, 11)
HSL	hsl(60, 71%, 15%)
HSV	hsv(60, 83%, 25%)
CMYK	cmyk(0%, 0%, 82.8%, 74.9%)
CIE-LAB	lab(26.10, -7.44, 30.32)
CIE-LCH	lch(26.10, 31.21, 103.78°)
OKLab	oklab(36.04% -0.0236 0.0668)
OKLCH	oklch(36.04% 0.071 109.5)
XYZ	xyz(4.0083, 4.7811, 1.0282)
Luminance	0.0478 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40400B #0B0B40

analogous

#40260B #40400B #26400B

triadic

#40400B #0B4040 #400B40

tetradic

#40400B #0B4026 #0B0B40 #400B26

square

#40400B #0B4026 #0B0B40 #400B26

split-complementary

#40400B #0B2640 #260B40

monochromatic

#1A1A04 #1A1A04 #40400B #747414 #A8A81D

Accessibility & contrast

On white

10.74

#40400B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#40400B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40400B

10.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40400B	#FFFFFF	#000000	##FFFFFF
##40400B	1.00	10.74	1.96	10.74
#FFFFFF	10.74	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#463D03

Deuteranopia (green-blind)

#473F0F

Tritanopia (blue-blind)

#453B36

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #40400b;
/* rgb */ color: rgb(64, 64, 11);
/* oklch */ color: oklch(36.0% 0.071 109.5);

Tailwind

colors: {
  custom: {
    50: '#77744f',
    500: '#40400b',
    950: '#000000',
  },
}

SCSS

$custom: #40400b;
$custom-light: #77744f;
$custom-dark: #000000;

JSON

{
  "hex": "#40400b",
  "rgb": {
    "r": 64,
    "g": 64,
    "b": 11
  },
  "hsl": {
    "h": 60,
    "s": 70.667,
    "l": 14.706
  },
  "oklch": {
    "l": 0.36039,
    "c": 0.07086,
    "h": 109.5
  },
  "luminance": 0.04781
}

Semantic roles & 50–950 ramp

primary

#40400B

secondary

#2A2A7D

accent

#3AED3A

background

#F7F7F4

surface

#EDEDE7

border

#C8C8C3

text

#090802

muted

#7B7B78

Preview Lab

Preview with #40400B

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

Preview Lab → · Contrast checker → · Palette generator →