#646BBB#646BBB

#646BBB is a mid, vivid blue. Relative luminance 0.168; OKLCH L 55.9% C 0.123 H 277.8°. Best body text is #FFFFFF at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#646BBB
RGB	rgb(100, 107, 187)
HSL	hsl(235, 39%, 56%)
HSV	hsv(235, 47%, 73%)
CMYK	cmyk(46.5%, 42.8%, 0%, 26.7%)
CIE-LAB	lab(48.02, 18.84, -43.11)
CIE-LCH	lch(48.02, 47.05, 293.60°)
OKLab	oklab(55.91% 0.0168 -0.122)
OKLCH	oklch(55.91% 0.123 277.8)
XYZ	xyz(19.4801, 16.8116, 49.2226)
Luminance	0.1681 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646BBB #BBB464

analogous

#6497BB #646BBB #8964BB

triadic

#646BBB #BB646B #6BBB64

tetradic

#646BBB #BB6497 #BBB464 #64BB89

square

#646BBB #BB6497 #BBB464 #64BB89

split-complementary

#646BBB #BB8964 #97BB64

monochromatic

#323772 #454C9D #646BBB #8F94CE #B9BCE0

Accessibility & contrast

On white

4.81

#646BBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.36

#646BBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646BBB

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646BBB	#FFFFFF	#000000	##FFFFFF
##646BBB	1.00	4.81	4.36	4.81
#FFFFFF	4.81	1.00	21.00	1.00
#000000	4.36	21.00	1.00	21.00
##FFFFFF	4.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4C75BE

Deuteranopia (green-blind)

#456FB9

Tritanopia (blue-blind)

#457C8A

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #646bbb;
/* rgb */ color: rgb(100, 107, 187);
/* oklch */ color: oklch(55.9% 0.123 277.8);

Tailwind

colors: {
  custom: {
    50: '#9595d0',
    500: '#646bbb',
    950: '#000000',
  },
}

SCSS

$custom: #646bbb;
$custom-light: #9595d0;
$custom-dark: #000000;

JSON

{
  "hex": "#646bbb",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 187
  },
  "hsl": {
    "h": 235.172,
    "s": 39.013,
    "l": 56.275
  },
  "oklch": {
    "l": 0.55908,
    "c": 0.12315,
    "h": 277.8
  },
  "luminance": 0.16813
}

Semantic roles & 50–950 ramp

primary

#646BBB

secondary

#CFCCAB

accent

#C559CF

background

#F9F9FC

surface

#F2F1F9

border

#CCCBD2

text

#0E0D14

muted

#7E7E82

Preview Lab

Preview with #646BBB

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

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