#646E21#646E21

#646E21 is a mid, moderate yellow. Relative luminance 0.140; OKLCH L 51.4% C 0.100 H 116.4°. Best body text is #FFFFFF at 5.53:1 contrast (WCAG AA passes).

Color values

HEX	#646E21
RGB	rgb(100, 110, 33)
HSL	hsl(68, 54%, 28%)
HSV	hsv(68, 70%, 43%)
CMYK	cmyk(9.1%, 0%, 70%, 56.9%)
CIE-LAB	lab(44.19, -15.00, 39.88)
CIE-LCH	lch(44.19, 42.61, 110.61°)
OKLab	oklab(51.37% -0.0447 0.0899)
OKLCH	oklch(51.37% 0.1 116.4)
XYZ	xyz(11.1062, 13.9711, 3.5502)
Luminance	0.1397 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646E21 #2B216E

analogous

#6E5121 #646E21 #3D6E21

triadic

#646E21 #21646E #6E2164

tetradic

#646E21 #216E51 #2B216E #6E213D

square

#646E21 #216E51 #2B216E #6E213D

split-complementary

#646E21 #213D6E #51216E

monochromatic

#151807 #393F13 #646E21 #8F9D2F #B5C743

Accessibility & contrast

On white

5.53

#646E21 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.79

#646E21 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646E21

5.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646E21	#FFFFFF	#000000	##FFFFFF
##646E21	1.00	5.53	3.79	5.53
#FFFFFF	5.53	1.00	21.00	1.00
#000000	3.79	21.00	1.00	21.00
##FFFFFF	5.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#766816

Deuteranopia (green-blind)

#756927

Tritanopia (blue-blind)

#6A685E

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #646e21;
/* rgb */ color: rgb(100, 110, 33);
/* oklch */ color: oklch(51.4% 0.100 116.4);

Tailwind

colors: {
  custom: {
    50: '#929761',
    500: '#646e21',
    950: '#000000',
  },
}

SCSS

$custom: #646e21;
$custom-light: #929761;
$custom-dark: #000000;

JSON

{
  "hex": "#646e21",
  "rgb": {
    "r": 100,
    "g": 110,
    "b": 33
  },
  "hsl": {
    "h": 67.792,
    "s": 53.846,
    "l": 28.039
  },
  "oklch": {
    "l": 0.51374,
    "c": 0.10042,
    "h": 116.4
  },
  "luminance": 0.13971
}

Semantic roles & 50–950 ramp

primary

#646E21

secondary

#5549A2

accent

#4BDD5E

background

#F9F9F5

surface

#F1F2EA

border

#CBCCC6

text

#0D0D05

muted

#7E7E79

Preview Lab

Preview with #646E21

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

Preview Lab → · Contrast checker → · Palette generator →