#645BB4#645BB4

#645BB4 is a mid, vivid blue. Relative luminance 0.135; OKLCH L 52.3% C 0.136 H 285.3°. Best body text is #FFFFFF at 5.68:1 contrast (WCAG AA passes).

Color values

HEX	#645BB4
RGB	rgb(100, 91, 180)
HSL	hsl(246, 37%, 53%)
HSV	hsv(246, 49%, 71%)
CMYK	cmyk(44.4%, 49.4%, 0%, 29.4%)
CIE-LAB	lab(43.49, 26.58, -46.26)
CIE-LCH	lch(43.49, 53.36, 299.88°)
OKLab	oklab(52.34% 0.0359 -0.1313)
OKLCH	oklch(52.34% 0.136 285.3)
XYZ	xyz(17.2325, 13.4861, 44.8663)
Luminance	0.1349 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645BB4 #ABB45B

analogous

#5B7FB4 #645BB4 #905BB4

triadic

#645BB4 #B4645B #5BB464

tetradic

#645BB4 #B45B7F #ABB45B #5BB490

square

#645BB4 #B45B7F #ABB45B #5BB490

split-complementary

#645BB4 #B4905B #7FB45B

monochromatic

#342F66 #4A4290 #645BB4 #8C85C7 #B3AFDA

Accessibility & contrast

On white

5.68

#645BB4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.70

#645BB4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645BB4

5.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645BB4	#FFFFFF	#000000	##FFFFFF
##645BB4	1.00	5.68	3.70	5.68
#FFFFFF	5.68	1.00	21.00	1.00
#000000	3.70	21.00	1.00	21.00
##FFFFFF	5.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3569B7

Deuteranopia (green-blind)

#3364B2

Tritanopia (blue-blind)

#4B6E7F

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #645bb4;
/* rgb */ color: rgb(100, 91, 180);
/* oklch */ color: oklch(52.3% 0.136 285.3);

Tailwind

colors: {
  custom: {
    50: '#9589cb',
    500: '#645bb4',
    950: '#000000',
  },
}

SCSS

$custom: #645bb4;
$custom-light: #9589cb;
$custom-dark: #000000;

JSON

{
  "hex": "#645bb4",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 180
  },
  "hsl": {
    "h": 246.067,
    "s": 37.238,
    "l": 53.137
  },
  "oklch": {
    "l": 0.52344,
    "c": 0.13612,
    "h": 285.3
  },
  "luminance": 0.13487
}

Semantic roles & 50–950 ramp

primary

#645BB4

secondary

#C5C9A2

accent

#CD5BC2

background

#F9F8FC

surface

#F2F0F8

border

#CCCBD1

text

#0E0B13

muted

#7E7C82

Preview Lab

Preview with #645BB4

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

Preview Lab → · Contrast checker → · Palette generator →