#645FBB#645FBB

#645FBB is a mid, vivid blue. Relative luminance 0.145; OKLCH L 53.6% C 0.140 H 283.0°. Best body text is #FFFFFF at 5.39:1 contrast (WCAG AA passes).

Color values

HEX	#645FBB
RGB	rgb(100, 95, 187)
HSL	hsl(243, 40%, 55%)
HSV	hsv(243, 49%, 73%)
CMYK	cmyk(46.5%, 49.2%, 0%, 26.7%)
CIE-LAB	lab(44.91, 26.23, -48.07)
CIE-LCH	lch(44.91, 54.76, 298.62°)
OKLab	oklab(53.55% 0.0316 -0.1366)
OKLCH	oklch(53.55% 0.14 283)
XYZ	xyz(18.3147, 14.4807, 48.8341)
Luminance	0.1448 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645FBB #B6BB5F

analogous

#5F88BB #645FBB #925FBB

triadic

#645FBB #BB645F #5FBB64

tetradic

#645FBB #BB5F88 #B6BB5F #5FBB92

square

#645FBB #BB5F88 #B6BB5F #5FBB92

split-complementary

#645FBB #BB925F #88BB5F

monochromatic

#333070 #47429B #645FBB #8E8ACD #B7B5E0

Accessibility & contrast

On white

5.39

#645FBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.90

#645FBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645FBB

5.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645FBB	#FFFFFF	#000000	##FFFFFF
##645FBB	1.00	5.39	3.90	5.39
#FFFFFF	5.39	1.00	21.00	1.00
#000000	3.90	21.00	1.00	21.00
##FFFFFF	5.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#376DBE

Deuteranopia (green-blind)

#3267B9

Tritanopia (blue-blind)

#477384

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #645fbb;
/* rgb */ color: rgb(100, 95, 187);
/* oklch */ color: oklch(53.6% 0.140 283.0);

Tailwind

colors: {
  custom: {
    50: '#958cd0',
    500: '#645fbb',
    950: '#000000',
  },
}

SCSS

$custom: #645fbb;
$custom-light: #958cd0;
$custom-dark: #000000;

JSON

{
  "hex": "#645fbb",
  "rgb": {
    "r": 100,
    "g": 95,
    "b": 187
  },
  "hsl": {
    "h": 243.261,
    "s": 40.351,
    "l": 55.294
  },
  "oklch": {
    "l": 0.53554,
    "c": 0.14019,
    "h": 283
  },
  "luminance": 0.14482
}

Semantic roles & 50–950 ramp

primary

#645FBB

secondary

#CCCEA8

accent

#D058CA

background

#F9F8FC

surface

#F2F0F9

border

#CCCBD2

text

#0E0C14

muted

#7E7D82

Preview Lab

Preview with #645FBB

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

Preview Lab → · Contrast checker → · Palette generator →