#645BB0#645BB0

#645BB0 is a mid, vivid blue. Relative luminance 0.133; OKLCH L 52.1% C 0.130 H 285.8°. Best body text is #FFFFFF at 5.73:1 contrast (WCAG AA passes).

Color values

HEX	#645BB0
RGB	rgb(100, 91, 176)
HSL	hsl(246, 35%, 52%)
HSV	hsv(246, 48%, 69%)
CMYK	cmyk(43.2%, 48.3%, 0%, 31%)
CIE-LAB	lab(43.25, 25.39, -44.30)
CIE-LCH	lch(43.25, 51.06, 299.82°)
OKLab	oklab(52.09% 0.0354 -0.1255)
OKLCH	oklch(52.09% 0.13 285.8)
XYZ	xyz(16.8308, 13.3254, 42.7511)
Luminance	0.1333 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645BB0 #A7B05B

analogous

#5B7DB0 #645BB0 #8F5BB0

triadic

#645BB0 #B0645B #5BB064

tetradic

#645BB0 #B05B7D #A7B05B #5BB08F

square

#645BB0 #B05B7D #A7B05B #5BB08F

split-complementary

#645BB0 #B08F5B #7DB05B

monochromatic

#342F62 #4B438B #645BB0 #8B84C4 #B2AED8

Accessibility & contrast

On white

5.73

#645BB0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.67

#645BB0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645BB0

5.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645BB0	#FFFFFF	#000000	##FFFFFF
##645BB0	1.00	5.73	3.67	5.73
#FFFFFF	5.73	1.00	21.00	1.00
#000000	3.67	21.00	1.00	21.00
##FFFFFF	5.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3969B3

Deuteranopia (green-blind)

#3764AE

Tritanopia (blue-blind)

#4D6D7D

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #645bb0;
/* rgb */ color: rgb(100, 91, 176);
/* oklch */ color: oklch(52.1% 0.130 285.8);

Tailwind

colors: {
  custom: {
    50: '#9489c8',
    500: '#645bb0',
    950: '#000000',
  },
}

SCSS

$custom: #645bb0;
$custom-light: #9489c8;
$custom-dark: #000000;

JSON

{
  "hex": "#645bb0",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 176
  },
  "hsl": {
    "h": 246.353,
    "s": 34.979,
    "l": 52.353
  },
  "oklch": {
    "l": 0.52089,
    "c": 0.13044,
    "h": 285.8
  },
  "luminance": 0.13326
}

Semantic roles & 50–950 ramp

primary

#645BB0

secondary

#C2C6A1

accent

#CB5DBF

background

#F9F8FC

surface

#F2F0F8

border

#CCCBD1

text

#0D0B13

muted

#7E7C82

Preview Lab

Preview with #645BB0

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

Preview Lab → · Contrast checker → · Palette generator →