#646C1F#646C1F

#646C1F is a mid, moderate yellow. Relative luminance 0.135; OKLCH L 50.9% C 0.099 H 115.1°. Best body text is #FFFFFF at 5.67:1 contrast (WCAG AA passes).

Color values

HEX	#646C1F
RGB	rgb(100, 108, 31)
HSL	hsl(66, 55%, 27%)
HSV	hsv(66, 71%, 42%)
CMYK	cmyk(7.4%, 0%, 71.3%, 57.6%)
CIE-LAB	lab(43.56, -14.04, 40.10)
CIE-LCH	lch(43.56, 42.49, 109.30°)
OKLab	oklab(50.86% -0.0422 0.0901)
OKLCH	oklch(50.86% 0.099 115.1)
XYZ	xyz(10.8657, 13.5336, 3.3359)
Luminance	0.1353 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646C1F #271F6C

analogous

#6C4E1F #646C1F #3D6C1F

triadic

#646C1F #1F646C #6C1F64

tetradic

#646C1F #1F6C4E #271F6C #6C1F3D

square

#646C1F #1F6C4E #271F6C #6C1F3D

split-complementary

#646C1F #1F3D6C #4E1F6C

monochromatic

#161807 #383C11 #646C1F #909C2D #B9C83E

Accessibility & contrast

On white

5.67

#646C1F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.71

#646C1F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646C1F

5.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646C1F	#FFFFFF	#000000	##FFFFFF
##646C1F	1.00	5.67	3.71	5.67
#FFFFFF	5.67	1.00	21.00	1.00
#000000	3.71	21.00	1.00	21.00
##FFFFFF	5.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#746613

Deuteranopia (green-blind)

#736825

Tritanopia (blue-blind)

#6B665D

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #646c1f;
/* rgb */ color: rgb(100, 108, 31);
/* oklch */ color: oklch(50.9% 0.099 115.1);

Tailwind

colors: {
  custom: {
    50: '#939660',
    500: '#646c1f',
    950: '#000000',
  },
}

SCSS

$custom: #646c1f;
$custom-light: #939660;
$custom-dark: #000000;

JSON

{
  "hex": "#646c1f",
  "rgb": {
    "r": 100,
    "g": 108,
    "b": 31
  },
  "hsl": {
    "h": 66.234,
    "s": 55.396,
    "l": 27.255
  },
  "oklch": {
    "l": 0.50859,
    "c": 0.09945,
    "h": 115.1
  },
  "luminance": 0.13533
}

Semantic roles & 50–950 ramp

primary

#646C1F

secondary

#5047A0

accent

#49DF59

background

#F9F9F5

surface

#F2F1EA

border

#CCCBC6

text

#0D0D05

muted

#7E7E79

Preview Lab

Preview with #646C1F

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

Preview Lab → · Contrast checker → · Palette generator →