#646BBA#646BBA

#646BBA is a mid, vivid blue. Relative luminance 0.168; OKLCH L 55.8% C 0.122 H 277.9°. Best body text is #FFFFFF at 4.82:1 contrast (WCAG AA passes).

Color values

HEX	#646BBA
RGB	rgb(100, 107, 186)
HSL	hsl(235, 38%, 56%)
HSV	hsv(235, 46%, 73%)
CMYK	cmyk(46.2%, 42.5%, 0%, 27.1%)
CIE-LAB	lab(47.97, 18.53, -42.62)
CIE-LCH	lch(47.97, 46.48, 293.50°)
OKLab	oklab(55.85% 0.0166 -0.1205)
OKLCH	oklch(55.85% 0.122 277.9)
XYZ	xyz(19.3734, 16.7689, 48.6607)
Luminance	0.1677 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646BBA #BAB364

analogous

#6496BA #646BBA #8864BA

triadic

#646BBA #BA646B #6BBA64

tetradic

#646BBA #BA6496 #BAB364 #64BA88

square

#646BBA #BA6496 #BAB364 #64BA88

split-complementary

#646BBA #BA8864 #96BA64

monochromatic

#323871 #454C9C #646BBA #8E93CD #B9BCE0

Accessibility & contrast

On white

4.82

#646BBA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.35

#646BBA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646BBA

4.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646BBA	#FFFFFF	#000000	##FFFFFF
##646BBA	1.00	4.82	4.35	4.82
#FFFFFF	4.82	1.00	21.00	1.00
#000000	4.35	21.00	1.00	21.00
##FFFFFF	4.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D75BD

Deuteranopia (green-blind)

#466FB8

Tritanopia (blue-blind)

#467B89

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #646bba;
/* rgb */ color: rgb(100, 107, 186);
/* oklch */ color: oklch(55.8% 0.122 277.9);

Tailwind

colors: {
  custom: {
    50: '#9595cf',
    500: '#646bba',
    950: '#000000',
  },
}

SCSS

$custom: #646bba;
$custom-light: #9595cf;
$custom-dark: #000000;

JSON

{
  "hex": "#646bba",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 186
  },
  "hsl": {
    "h": 235.116,
    "s": 38.393,
    "l": 56.078
  },
  "oklch": {
    "l": 0.55849,
    "c": 0.12169,
    "h": 277.9
  },
  "luminance": 0.1677
}

Semantic roles & 50–950 ramp

primary

#646BBA

secondary

#CFCCAB

accent

#C559CE

background

#F9F9FC

surface

#F2F1F9

border

#CCCBD2

text

#0E0D14

muted

#7E7E82

Preview Lab

Preview with #646BBA

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

Preview Lab → · Contrast checker → · Palette generator →