#646B23#646B23

#646B23 is a mid, moderate yellow. Relative luminance 0.133; OKLCH L 50.6% C 0.095 H 114.6°. Best body text is #FFFFFF at 5.72:1 contrast (WCAG AA passes).

Color values

HEX	#646B23
RGB	rgb(100, 107, 35)
HSL	hsl(66, 51%, 28%)
HSV	hsv(66, 67%, 42%)
CMYK	cmyk(6.5%, 0%, 67.3%, 58%)
CIE-LAB	lab(43.28, -13.22, 38.04)
CIE-LCH	lch(43.28, 40.27, 109.16°)
OKLab	oklab(50.65% -0.0395 0.0864)
OKLCH	oklch(50.65% 0.095 114.6)
XYZ	xyz(10.8169, 13.3462, 3.5960)
Luminance	0.1335 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646B23 #2A236B

analogous

#6B4E23 #646B23 #406B23

triadic

#646B23 #23646B #6B2364

tetradic

#646B23 #236B4E #2A236B #6B2340

square

#646B23 #236B4E #2A236B #6B2340

split-complementary

#646B23 #23406B #4E236B

monochromatic

#161708 #393D14 #646B23 #8F9932 #B6C246

Accessibility & contrast

On white

5.72

#646B23 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.67

#646B23 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646B23

5.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646B23	#FFFFFF	#000000	##FFFFFF
##646B23	1.00	5.72	3.67	5.72
#FFFFFF	5.72	1.00	21.00	1.00
#000000	3.67	21.00	1.00	21.00
##FFFFFF	5.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#73661A

Deuteranopia (green-blind)

#726728

Tritanopia (blue-blind)

#6B655C

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #646b23;
/* rgb */ color: rgb(100, 107, 35);
/* oklch */ color: oklch(50.6% 0.095 114.6);

Tailwind

colors: {
  custom: {
    50: '#929562',
    500: '#646b23',
    950: '#000000',
  },
}

SCSS

$custom: #646b23;
$custom-light: #929562;
$custom-dark: #000000;

JSON

{
  "hex": "#646b23",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 35
  },
  "hsl": {
    "h": 65.833,
    "s": 50.704,
    "l": 27.843
  },
  "oklch": {
    "l": 0.50649,
    "c": 0.09497,
    "h": 114.6
  },
  "luminance": 0.13346
}

Semantic roles & 50–950 ramp

primary

#646B23

secondary

#534B9E

accent

#4EDA5B

background

#F9F9F5

surface

#F1F1EA

border

#CBCBC6

text

#0D0D05

muted

#7E7E79

Preview Lab

Preview with #646B23

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

Preview Lab → · Contrast checker → · Palette generator →