#423F0B#423F0B

#423F0B is a dark, moderate yellow. Relative luminance 0.047; OKLCH L 36.0% C 0.069 H 106.0°. Best body text is #FFFFFF at 10.78:1 contrast (WCAG AA passes).

Color values

HEX	#423F0B
RGB	rgb(66, 63, 11)
HSL	hsl(57, 71%, 15%)
HSV	hsv(57, 83%, 26%)
CMYK	cmyk(0%, 4.5%, 83.3%, 74.1%)
CIE-LAB	lab(25.97, -5.78, 30.27)
CIE-LCH	lch(25.97, 30.81, 100.82°)
OKLab	oklab(35.99% -0.0191 0.0666)
OKLCH	oklch(35.99% 0.069 106)
XYZ	xyz(4.0848, 4.7376, 1.0158)
Luminance	0.0474 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#423F0B #0B0E42

analogous

#42230B #423F0B #2A420B

triadic

#423F0B #0B423F #3F0B42

tetradic

#423F0B #0B4223 #0B0E42 #420B2A

square

#423F0B #0B4223 #0B0E42 #420B2A

split-complementary

#423F0B #0B2A42 #230B42

monochromatic

#1A1904 #1A1904 #423F0B #767114 #ABA31C

Accessibility & contrast

On white

10.78

#423F0B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#423F0B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423F0B

10.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##423F0B	#FFFFFF	#000000	##FFFFFF
##423F0B	1.00	10.78	1.95	10.78
#FFFFFF	10.78	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#453C03

Deuteranopia (green-blind)

#463E0F

Tritanopia (blue-blind)

#483A35

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #423f0b;
/* rgb */ color: rgb(66, 63, 11);
/* oklch */ color: oklch(36.0% 0.069 106.0);

Tailwind

colors: {
  custom: {
    50: '#79734e',
    500: '#423f0b',
    950: '#000000',
  },
}

SCSS

$custom: #423f0b;
$custom-light: #79734e;
$custom-dark: #000000;

JSON

{
  "hex": "#423f0b",
  "rgb": {
    "r": 66,
    "g": 63,
    "b": 11
  },
  "hsl": {
    "h": 56.727,
    "s": 71.429,
    "l": 15.098
  },
  "oklch": {
    "l": 0.35986,
    "c": 0.0693,
    "h": 106
  },
  "luminance": 0.04737
}

Semantic roles & 50–950 ramp

primary

#423F0B

secondary

#2A2F7F

accent

#43EE3A

background

#F7F6F4

surface

#EEECE7

border

#C9C7C3

text

#090802

muted

#7B7B78

Preview Lab

Preview with #423F0B

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

Preview Lab → · Contrast checker → · Palette generator →