#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
RGBrgb(66, 63, 11)
HSLhsl(57, 71%, 15%)
HSVhsv(57, 83%, 26%)
CMYKcmyk(0%, 4.5%, 83.3%, 74.1%)
CIE-LABlab(25.97, -5.78, 30.27)
CIE-LCHlch(25.97, 30.81, 100.82°)
OKLaboklab(35.99% -0.0191 0.0666)
OKLCHoklch(35.99% 0.069 106)
XYZxyz(4.0848, 4.7376, 1.0158)
Luminance0.0474 (WCAG relative)
Temperaturewarm
Familyyellow

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
##423F0B1.0010.781.9510.78
#FFFFFF10.781.0021.001.00
#0000001.9521.001.0021.00
##FFFFFF10.781.0021.001.00

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 →

#423F0B Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva