#645BB3#645BB3

#645BB3 is a mid, vivid blue. Relative luminance 0.134; OKLCH L 52.3% C 0.135 H 285.4°. Best body text is #FFFFFF at 5.69:1 contrast (WCAG AA passes).

Color values

HEX	#645BB3
RGB	rgb(100, 91, 179)
HSL	hsl(246, 37%, 53%)
HSV	hsv(246, 49%, 70%)
CMYK	cmyk(44.1%, 49.2%, 0%, 29.8%)
CIE-LAB	lab(43.43, 26.28, -45.77)
CIE-LCH	lch(43.43, 52.78, 299.87°)
OKLab	oklab(52.28% 0.0358 -0.1299)
OKLCH	oklch(52.28% 0.135 285.4)
XYZ	xyz(17.1310, 13.4455, 44.3317)
Luminance	0.1345 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645BB3 #AAB35B

analogous

#5B7EB3 #645BB3 #905BB3

triadic

#645BB3 #B3645B #5BB364

tetradic

#645BB3 #B35B7E #AAB35B #5BB390

square

#645BB3 #B35B7E #AAB35B #5BB390

split-complementary

#645BB3 #B3905B #7EB35B

monochromatic

#342F65 #4A428F #645BB3 #8C85C6 #B3AFDA

Accessibility & contrast

On white

5.69

#645BB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.69

#645BB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645BB3

5.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645BB3	#FFFFFF	#000000	##FFFFFF
##645BB3	1.00	5.69	3.69	5.69
#FFFFFF	5.69	1.00	21.00	1.00
#000000	3.69	21.00	1.00	21.00
##FFFFFF	5.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3669B6

Deuteranopia (green-blind)

#3464B1

Tritanopia (blue-blind)

#4C6D7E

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #645bb3;
/* rgb */ color: rgb(100, 91, 179);
/* oklch */ color: oklch(52.3% 0.135 285.4);

Tailwind

colors: {
  custom: {
    50: '#9589ca',
    500: '#645bb3',
    950: '#000000',
  },
}

SCSS

$custom: #645bb3;
$custom-light: #9589ca;
$custom-dark: #000000;

JSON

{
  "hex": "#645bb3",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 179
  },
  "hsl": {
    "h": 246.136,
    "s": 36.667,
    "l": 52.941
  },
  "oklch": {
    "l": 0.5228,
    "c": 0.1347,
    "h": 285.4
  },
  "luminance": 0.13446
}

Semantic roles & 50–950 ramp

primary

#645BB3

secondary

#C4C8A2

accent

#CD5BC1

background

#F9F8FC

surface

#F2F0F8

border

#CCCBD1

text

#0E0B13

muted

#7E7C82

Preview Lab

Preview with #645BB3

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

Preview Lab → · Contrast checker → · Palette generator →