#40370F#40370F

#40370F is a dark, muted yellow. Relative luminance 0.039; OKLCH L 33.7% C 0.058 H 96.4°. Best body text is #FFFFFF at 11.86:1 contrast (WCAG AA passes).

Color values

HEX	#40370F
RGB	rgb(64, 55, 15)
HSL	hsl(49, 62%, 15%)
HSV	hsv(49, 77%, 25%)
CMYK	cmyk(0%, 14.1%, 76.6%, 74.9%)
CIE-LAB	lab(23.19, -1.54, 25.57)
CIE-LCH	lch(23.19, 25.62, 93.44°)
OKLab	oklab(33.74% -0.0064 0.0576)
OKLCH	oklch(33.74% 0.058 96.4)
XYZ	xyz(3.5669, 3.8570, 1.0084)
Luminance	0.0386 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40370F #0F1840

analogous

#401E0F #40370F #30400F

triadic

#40370F #0F4037 #370F40

tetradic

#40370F #0F401E #0F1840 #400F30

square

#40370F #0F401E #0F1840 #400F30

split-complementary

#40370F #0F3040 #1E0F40

monochromatic

#191506 #191506 #40370F #72621B #A38C26

Accessibility & contrast

On white

11.86

#40370F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#40370F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40370F

11.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40370F	#FFFFFF	#000000	##FFFFFF
##40370F	1.00	11.86	1.77	11.86
#FFFFFF	11.86	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D360A

Deuteranopia (green-blind)

#403911

Tritanopia (blue-blind)

#46322F

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #40370f;
/* rgb */ color: rgb(64, 55, 15);
/* oklch */ color: oklch(33.7% 0.058 96.4);

Tailwind

colors: {
  custom: {
    50: '#776d50',
    500: '#40370f',
    950: '#000000',
  },
}

SCSS

$custom: #40370f;
$custom-light: #776d50;
$custom-dark: #000000;

JSON

{
  "hex": "#40370f",
  "rgb": {
    "r": 64,
    "g": 55,
    "b": 15
  },
  "hsl": {
    "h": 48.98,
    "s": 62.025,
    "l": 15.49
  },
  "oklch": {
    "l": 0.33737,
    "c": 0.05799,
    "h": 96.4
  },
  "luminance": 0.03857
}

Semantic roles & 50–950 ramp

primary

#40370F

secondary

#303E7A

accent

#61E543

background

#F7F6F4

surface

#EDEBE7

border

#C8C6C3

text

#090702

muted

#7B7A78

Preview Lab

Preview with #40370F

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

Preview Lab → · Contrast checker → · Palette generator →