#645BC9#645BC9

#645BC9 is a mid, vivid blue. Relative luminance 0.144; OKLCH L 53.8% C 0.165 H 283.0°. Best body text is #FFFFFF at 5.41:1 contrast (WCAG AA passes).

Color values

HEX	#645BC9
RGB	rgb(100, 91, 201)
HSL	hsl(245, 50%, 57%)
HSV	hsv(245, 55%, 79%)
CMYK	cmyk(50.2%, 54.7%, 0%, 21.2%)
CIE-LAB	lab(44.81, 32.96, -56.34)
CIE-LCH	lch(44.81, 65.27, 300.33°)
OKLab	oklab(53.76% 0.0372 -0.1609)
OKLCH	oklch(53.76% 0.165 283)
XYZ	xyz(19.5360, 14.4075, 56.9985)
Luminance	0.1441 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645BC9 #C0C95B

analogous

#5B89C9 #645BC9 #9B5BC9

triadic

#645BC9 #C9645B #5BC964

tetradic

#645BC9 #C95B89 #C0C95B #5BC99B

square

#645BC9 #C95B89 #C0C95B #5BC99B

split-complementary

#645BC9 #C99B5B #89C95B

monochromatic

#312A80 #4339AE #645BC9 #9089D8 #BBB7E7

Accessibility & contrast

On white

5.41

#645BC9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.88

#645BC9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645BC9

5.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645BC9	#FFFFFF	#000000	##FFFFFF
##645BC9	1.00	5.41	3.88	5.41
#FFFFFF	5.41	1.00	21.00	1.00
#000000	3.88	21.00	1.00	21.00
##FFFFFF	5.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#196ECD

Deuteranopia (green-blind)

#0C66C7

Tritanopia (blue-blind)

#3E7489

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #645bc9;
/* rgb */ color: rgb(100, 91, 201);
/* oklch */ color: oklch(53.8% 0.165 283.0);

Tailwind

colors: {
  custom: {
    50: '#9789da',
    500: '#645bc9',
    950: '#000000',
  },
}

SCSS

$custom: #645bc9;
$custom-light: #9789da;
$custom-dark: #000000;

JSON

{
  "hex": "#645bc9",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 201
  },
  "hsl": {
    "h": 244.909,
    "s": 50.459,
    "l": 57.255
  },
  "oklch": {
    "l": 0.5376,
    "c": 0.16517,
    "h": 283
  },
  "luminance": 0.14409
}

Semantic roles & 50–950 ramp

primary

#645BC9

secondary

#D3D6AA

accent

#DA4ECE

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0E0B15

muted

#7E7C83

Preview Lab

Preview with #645BC9

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

Preview Lab → · Contrast checker → · Palette generator →