#645CB5#645CB5

#645CB5 is a mid, vivid blue. Relative luminance 0.137; OKLCH L 52.6% C 0.136 H 284.8°. Best body text is #FFFFFF at 5.61:1 contrast (WCAG AA passes).

Color values

HEX	#645CB5
RGB	rgb(100, 92, 181)
HSL	hsl(245, 38%, 54%)
HSV	hsv(245, 49%, 71%)
CMYK	cmyk(44.8%, 49.2%, 0%, 29%)
CIE-LAB	lab(43.80, 26.27, -46.35)
CIE-LCH	lch(43.80, 53.28, 299.54°)
OKLab	oklab(52.6% 0.0347 -0.1316)
OKLCH	oklch(52.6% 0.136 284.8)
XYZ	xyz(17.4207, 13.6991, 45.4334)
Luminance	0.1370 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645CB5 #ADB55C

analogous

#5C80B5 #645CB5 #905CB5

triadic

#645CB5 #B5645C #5CB564

tetradic

#645CB5 #B55C80 #ADB55C #5CB590

square

#645CB5 #B55C80 #ADB55C #5CB590

split-complementary

#645CB5 #B5905C #80B55C

monochromatic

#342F68 #494292 #645CB5 #8C86C8 #B4B0DB

Accessibility & contrast

On white

5.61

#645CB5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.74

#645CB5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645CB5

5.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645CB5	#FFFFFF	#000000	##FFFFFF
##645CB5	1.00	5.61	3.74	5.61
#FFFFFF	5.61	1.00	21.00	1.00
#000000	3.74	21.00	1.00	21.00
##FFFFFF	5.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#366AB8

Deuteranopia (green-blind)

#3365B3

Tritanopia (blue-blind)

#4A6F80

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #645cb5;
/* rgb */ color: rgb(100, 92, 181);
/* oklch */ color: oklch(52.6% 0.136 284.8);

Tailwind

colors: {
  custom: {
    50: '#958acc',
    500: '#645cb5',
    950: '#000000',
  },
}

SCSS

$custom: #645cb5;
$custom-light: #958acc;
$custom-dark: #000000;

JSON

{
  "hex": "#645cb5",
  "rgb": {
    "r": 100,
    "g": 92,
    "b": 181
  },
  "hsl": {
    "h": 245.393,
    "s": 37.553,
    "l": 53.529
  },
  "oklch": {
    "l": 0.52598,
    "c": 0.13606,
    "h": 284.8
  },
  "luminance": 0.137
}

Semantic roles & 50–950 ramp

primary

#645CB5

secondary

#C6C9A3

accent

#CE5AC3

background

#F9F8FC

surface

#F2F0F9

border

#CCCBD2

text

#0E0B13

muted

#7E7C82

Preview Lab

Preview with #645CB5

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

Preview Lab → · Contrast checker → · Palette generator →