#645D99#645D99

#645D99 is a mid, moderate blue. Relative luminance 0.128; OKLCH L 51.1% C 0.094 H 288.0°. Best body text is #FFFFFF at 5.89:1 contrast (WCAG AA passes).

Color values

HEX	#645D99
RGB	rgb(100, 93, 153)
HSL	hsl(247, 24%, 48%)
HSV	hsv(247, 39%, 60%)
CMYK	cmyk(34.6%, 39.2%, 0%, 40%)
CIE-LAB	lab(42.52, 17.48, -31.83)
CIE-LCH	lch(42.52, 36.32, 298.77°)
OKLab	oklab(51.13% 0.0289 -0.0892)
OKLCH	oklch(51.13% 0.094 288)
XYZ	xyz(14.9181, 12.8375, 31.8227)
Luminance	0.1284 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645D99 #92995D

analogous

#5D7499 #645D99 #825D99

triadic

#645D99 #99645D #5D9964

tetradic

#645D99 #995D74 #92995D #5D9982

square

#645D99 #995D74 #92995D #5D9982

split-complementary

#645D99 #99825D #74995D

monochromatic

#322F4D #4B4673 #645D99 #8781B2 #ABA7C9

Accessibility & contrast

On white

5.89

#645D99 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.57

#645D99 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645D99

5.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645D99	#FFFFFF	#000000	##FFFFFF
##645D99	1.00	5.89	3.57	5.89
#FFFFFF	5.89	1.00	21.00	1.00
#000000	3.57	21.00	1.00	21.00
##FFFFFF	5.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A669B

Deuteranopia (green-blind)

#4A6398

Tritanopia (blue-blind)

#576874

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #645d99;
/* rgb */ color: rgb(100, 93, 153);
/* oklch */ color: oklch(51.1% 0.094 288.0);

Tailwind

colors: {
  custom: {
    50: '#928bb7',
    500: '#645d99',
    950: '#000000',
  },
}

SCSS

$custom: #645d99;
$custom-light: #928bb7;
$custom-dark: #000000;

JSON

{
  "hex": "#645d99",
  "rgb": {
    "r": 100,
    "g": 93,
    "b": 153
  },
  "hsl": {
    "h": 247,
    "s": 24.39,
    "l": 48.235
  },
  "oklch": {
    "l": 0.51127,
    "c": 0.09373,
    "h": 288
  },
  "luminance": 0.12838
}

Semantic roles & 50–950 ramp

primary

#645D99

secondary

#B4B89A

accent

#C167B6

background

#F9F8FB

surface

#F1F0F6

border

#CBCBD0

text

#0D0C11

muted

#7E7D80

Preview Lab

Preview with #645D99

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

Preview Lab → · Contrast checker → · Palette generator →