#645BBD#645BBD

#645BBD is a mid, vivid blue. Relative luminance 0.139; OKLCH L 52.9% C 0.149 H 284.3°. Best body text is #FFFFFF at 5.57:1 contrast (WCAG AA passes).

Color values

HEX	#645BBD
RGB	rgb(100, 91, 189)
HSL	hsl(246, 43%, 55%)
HSV	hsv(246, 52%, 74%)
CMYK	cmyk(47.1%, 51.9%, 0%, 25.9%)
CIE-LAB	lab(44.04, 29.30, -50.63)
CIE-LCH	lch(44.04, 58.50, 300.05°)
OKLab	oklab(52.94% 0.0366 -0.1441)
OKLCH	oklch(52.94% 0.149 284.3)
XYZ	xyz(18.1792, 13.8648, 49.8525)
Luminance	0.1387 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645BBD #B4BD5B

analogous

#5B83BD #645BBD #955BBD

triadic

#645BBD #BD645B #5BBD64

tetradic

#645BBD #BD5B83 #B4BD5B #5BBD95

square

#645BBD #BD5B83 #B4BD5B #5BBD95

split-complementary

#645BBD #BD955B #83BD5B

monochromatic

#332D70 #473F9C #645BBD #8D87CF #B6B2E0

Accessibility & contrast

On white

5.57

#645BBD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.77

#645BBD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645BBD

5.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645BBD	#FFFFFF	#000000	##FFFFFF
##645BBD	1.00	5.57	3.77	5.57
#FFFFFF	5.57	1.00	21.00	1.00
#000000	3.77	21.00	1.00	21.00
##FFFFFF	5.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C6BC0

Deuteranopia (green-blind)

#2865BB

Tritanopia (blue-blind)

#467083

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #645bbd;
/* rgb */ color: rgb(100, 91, 189);
/* oklch */ color: oklch(52.9% 0.149 284.3);

Tailwind

colors: {
  custom: {
    50: '#9689d1',
    500: '#645bbd',
    950: '#000000',
  },
}

SCSS

$custom: #645bbd;
$custom-light: #9689d1;
$custom-dark: #000000;

JSON

{
  "hex": "#645bbd",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 189
  },
  "hsl": {
    "h": 245.51,
    "s": 42.609,
    "l": 54.902
  },
  "oklch": {
    "l": 0.52936,
    "c": 0.14872,
    "h": 284.3
  },
  "luminance": 0.13866
}

Semantic roles & 50–950 ramp

primary

#645BBD

secondary

#CBCFA5

accent

#D255C7

background

#F9F8FC

surface

#F2F0F9

border

#CCCBD2

text

#0E0B14

muted

#7E7C82

Preview Lab

Preview with #645BBD

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

Preview Lab → · Contrast checker → · Palette generator →