#40370A#40370A

#40370A is a dark, moderate yellow. Relative luminance 0.038; OKLCH L 33.7% C 0.062 H 97.4°. Best body text is #FFFFFF at 11.87:1 contrast (WCAG AA passes).

Color values

HEX	#40370A
RGB	rgb(64, 55, 10)
HSL	hsl(50, 73%, 15%)
HSV	hsv(50, 84%, 25%)
CMYK	cmyk(0%, 14.1%, 84.4%, 74.9%)
CIE-LAB	lab(23.15, -1.85, 27.86)
CIE-LCH	lch(23.15, 27.92, 93.79°)
OKLab	oklab(33.69% -0.008 0.0615)
OKLCH	oklch(33.69% 0.062 97.4)
XYZ	xyz(3.5355, 3.8445, 0.8429)
Luminance	0.0384 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40370A #0A1340

analogous

#401C0A #40370A #2E400A

triadic

#40370A #0A4037 #370A40

tetradic

#40370A #0A401C #0A1340 #400A2E

square

#40370A #0A401C #0A1340 #400A2E

split-complementary

#40370A #0A2E40 #1C0A40

monochromatic

#1A1704 #1A1704 #40370A #756412 #AA921B

Accessibility & contrast

On white

11.87

#40370A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#40370A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40370A

11.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40370A	#FFFFFF	#000000	##FFFFFF
##40370A	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)

#3D3504

Deuteranopia (green-blind)

#40380D

Tritanopia (blue-blind)

#46322E

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #40370a;
/* rgb */ color: rgb(64, 55, 10);
/* oklch */ color: oklch(33.7% 0.062 97.4);

Tailwind

colors: {
  custom: {
    50: '#776d4d',
    500: '#40370a',
    950: '#000000',
  },
}

SCSS

$custom: #40370a;
$custom-light: #776d4d;
$custom-dark: #000000;

JSON

{
  "hex": "#40370a",
  "rgb": {
    "r": 64,
    "g": 55,
    "b": 10
  },
  "hsl": {
    "h": 50,
    "s": 72.973,
    "l": 14.51
  },
  "oklch": {
    "l": 0.33689,
    "c": 0.06205,
    "h": 97.4
  },
  "luminance": 0.03844
}

Semantic roles & 50–950 ramp

primary

#40370A

secondary

#29377D

accent

#57F038

background

#F7F6F4

surface

#EDEBE7

border

#C8C6C3

text

#090701

muted

#7B7A77

Preview Lab

Preview with #40370A

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

Preview Lab → · Contrast checker → · Palette generator →