#645B9D#645B9D

#645B9D is a mid, moderate blue. Relative luminance 0.126; OKLCH L 50.9% C 0.103 H 288.4°. Best body text is #FFFFFF at 5.96:1 contrast (WCAG AA passes).

Color values

HEX	#645B9D
RGB	rgb(100, 91, 157)
HSL	hsl(248, 27%, 49%)
HSV	hsv(248, 42%, 62%)
CMYK	cmyk(36.3%, 42%, 0%, 38.4%)
CIE-LAB	lab(42.19, 19.85, -34.73)
CIE-LCH	lch(42.19, 40.00, 299.75°)
OKLab	oklab(50.95% 0.0326 -0.0976)
OKLCH	oklch(50.95% 0.103 288.4)
XYZ	xyz(15.0808, 12.6254, 33.5341)
Luminance	0.1263 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645B9D #949D5B

analogous

#5B739D #645B9D #855B9D

triadic

#645B9D #9D645B #5B9D64

tetradic

#645B9D #9D5B73 #949D5B #5B9D85

square

#645B9D #9D5B73 #949D5B #5B9D85

split-complementary

#645B9D #9D855B #739D5B

monochromatic

#332E50 #4B4576 #645B9D #8780B5 #ACA7CC

Accessibility & contrast

On white

5.96

#645B9D on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.53

#645B9D on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645B9D

5.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645B9D	#FFFFFF	#000000	##FFFFFF
##645B9D	1.00	5.96	3.53	5.96
#FFFFFF	5.96	1.00	21.00	1.00
#000000	3.53	21.00	1.00	21.00
##FFFFFF	5.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4665A0

Deuteranopia (green-blind)

#45629B

Tritanopia (blue-blind)

#556874

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #645b9d;
/* rgb */ color: rgb(100, 91, 157);
/* oklch */ color: oklch(50.9% 0.103 288.4);

Tailwind

colors: {
  custom: {
    50: '#9289ba',
    500: '#645b9d',
    950: '#000000',
  },
}

SCSS

$custom: #645b9d;
$custom-light: #9289ba;
$custom-dark: #000000;

JSON

{
  "hex": "#645b9d",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 157
  },
  "hsl": {
    "h": 248.182,
    "s": 26.613,
    "l": 48.627
  },
  "oklch": {
    "l": 0.50947,
    "c": 0.10287,
    "h": 288.4
  },
  "luminance": 0.12626
}

Semantic roles & 50–950 ramp

primary

#645B9D

secondary

#B5BA9A

accent

#C365B6

background

#F9F8FB

surface

#F1F0F6

border

#CBCBD0

text

#0D0B11

muted

#7E7C80

Preview Lab

Preview with #645B9D

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

Preview Lab → · Contrast checker → · Palette generator →