#645A9B#645A9B

#645A9B is a mid, moderate blue. Relative luminance 0.124; OKLCH L 50.6% C 0.102 H 289.3°. Best body text is #FFFFFF at 6.04:1 contrast (WCAG AA passes).

Color values

HEX	#645A9B
RGB	rgb(100, 90, 155)
HSL	hsl(249, 27%, 48%)
HSV	hsv(249, 42%, 61%)
CMYK	cmyk(35.5%, 41.9%, 0%, 39.2%)
CIE-LAB	lab(41.83, 19.91, -34.12)
CIE-LCH	lch(41.83, 39.50, 300.26°)
OKLab	oklab(50.63% 0.0336 -0.0958)
OKLCH	oklch(50.63% 0.102 289.3)
XYZ	xyz(14.8265, 12.3878, 32.6139)
Luminance	0.1239 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645A9B #919B5A

analogous

#5A709B #645A9B #845A9B

triadic

#645A9B #9B645A #5A9B64

tetradic

#645A9B #9B5A70 #919B5A #5A9B84

square

#645A9B #9B5A70 #919B5A #5A9B84

split-complementary

#645A9B #9B845A #709B5A

monochromatic

#322D4E #4B4474 #645A9B #867EB4 #ABA5CB

Accessibility & contrast

On white

6.04

#645A9B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.48

#645A9B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645A9B

6.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645A9B	#FFFFFF	#000000	##FFFFFF
##645A9B	1.00	6.04	3.48	6.04
#FFFFFF	6.04	1.00	21.00	1.00
#000000	3.48	21.00	1.00	21.00
##FFFFFF	6.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#45649D

Deuteranopia (green-blind)

#456199

Tritanopia (blue-blind)

#566673

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #645a9b;
/* rgb */ color: rgb(100, 90, 155);
/* oklch */ color: oklch(50.6% 0.102 289.3);

Tailwind

colors: {
  custom: {
    50: '#9288b9',
    500: '#645a9b',
    950: '#000000',
  },
}

SCSS

$custom: #645a9b;
$custom-light: #9288b9;
$custom-dark: #000000;

JSON

{
  "hex": "#645a9b",
  "rgb": {
    "r": 100,
    "g": 90,
    "b": 155
  },
  "hsl": {
    "h": 249.231,
    "s": 26.531,
    "l": 48.039
  },
  "oklch": {
    "l": 0.50634,
    "c": 0.1015,
    "h": 289.3
  },
  "luminance": 0.12388
}

Semantic roles & 50–950 ramp

primary

#645A9B

secondary

#B4B898

accent

#C365B4

background

#F9F8FB

surface

#F1F0F6

border

#CBCBD0

text

#0D0B11

muted

#7E7C80

Preview Lab

Preview with #645A9B

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

Preview Lab → · Contrast checker → · Palette generator →