#645D9B#645D9B

#645D9B is a mid, moderate blue. Relative luminance 0.129; OKLCH L 51.2% C 0.097 H 287.7°. Best body text is #FFFFFF at 5.86:1 contrast (WCAG AA passes).

Color values

HEX	#645D9B
RGB	rgb(100, 93, 155)
HSL	hsl(247, 25%, 49%)
HSV	hsv(247, 40%, 61%)
CMYK	cmyk(35.5%, 40%, 0%, 39.2%)
CIE-LAB	lab(42.62, 18.04, -32.87)
CIE-LCH	lch(42.62, 37.49, 298.76°)
OKLab	oklab(51.24% 0.0293 -0.0922)
OKLCH	oklch(51.24% 0.097 287.7)
XYZ	xyz(15.0847, 12.9042, 32.7000)
Luminance	0.1290 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645D9B #949B5D

analogous

#5D759B #645D9B #835D9B

triadic

#645D9B #9B645D #5D9B64

tetradic

#645D9B #9B5D75 #949B5D #5D9B83

square

#645D9B #9B5D75 #949B5D #5D9B83

split-complementary

#645D9B #9B835D #759B5D

monochromatic

#332F4E #4B4675 #645D9B #8781B4 #ACA8CB

Accessibility & contrast

On white

5.86

#645D9B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.58

#645D9B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645D9B

5.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645D9B	#FFFFFF	#000000	##FFFFFF
##645D9B	1.00	5.86	3.58	5.86
#FFFFFF	5.86	1.00	21.00	1.00
#000000	3.58	21.00	1.00	21.00
##FFFFFF	5.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#49669D

Deuteranopia (green-blind)

#496399

Tritanopia (blue-blind)

#566974

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #645d9b;
/* rgb */ color: rgb(100, 93, 155);
/* oklch */ color: oklch(51.2% 0.097 287.7);

Tailwind

colors: {
  custom: {
    50: '#928bb9',
    500: '#645d9b',
    950: '#000000',
  },
}

SCSS

$custom: #645d9b;
$custom-light: #928bb9;
$custom-dark: #000000;

JSON

{
  "hex": "#645d9b",
  "rgb": {
    "r": 100,
    "g": 93,
    "b": 155
  },
  "hsl": {
    "h": 246.774,
    "s": 25,
    "l": 48.627
  },
  "oklch": {
    "l": 0.51237,
    "c": 0.09671,
    "h": 287.7
  },
  "luminance": 0.12905
}

Semantic roles & 50–950 ramp

primary

#645D9B

secondary

#B5B99B

accent

#C166B7

background

#F9F8FB

surface

#F1F0F6

border

#CBCBD0

text

#0D0C11

muted

#7E7D80

Preview Lab

Preview with #645D9B

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

Preview Lab → · Contrast checker → · Palette generator →