#646BB9#646BB9

#646BB9 is a mid, vivid blue. Relative luminance 0.167; OKLCH L 55.8% C 0.120 H 277.9°. Best body text is #FFFFFF at 4.83:1 contrast (WCAG AA passes).

Color values

HEX	#646BB9
RGB	rgb(100, 107, 185)
HSL	hsl(235, 38%, 56%)
HSV	hsv(235, 46%, 73%)
CMYK	cmyk(45.9%, 42.2%, 0%, 27.5%)
CIE-LAB	lab(47.91, 18.23, -42.13)
CIE-LCH	lch(47.91, 45.90, 293.40°)
OKLab	oklab(55.79% 0.0165 -0.1191)
OKLCH	oklch(55.79% 0.12 277.9)
XYZ	xyz(19.2675, 16.7265, 48.1028)
Luminance	0.1673 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646BB9 #B9B264

analogous

#6495B9 #646BB9 #8764B9

triadic

#646BB9 #B9646B #6BB964

tetradic

#646BB9 #B96495 #B9B264 #64B987

square

#646BB9 #B96495 #B9B264 #64B987

split-complementary

#646BB9 #B98764 #95B964

monochromatic

#333870 #464D9A #646BB9 #8E93CC #B8BCDF

Accessibility & contrast

On white

4.83

#646BB9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.35

#646BB9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646BB9

4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646BB9	#FFFFFF	#000000	##FFFFFF
##646BB9	1.00	4.83	4.35	4.83
#FFFFFF	4.83	1.00	21.00	1.00
#000000	4.35	21.00	1.00	21.00
##FFFFFF	4.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D75BC

Deuteranopia (green-blind)

#476FB7

Tritanopia (blue-blind)

#467B89

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #646bb9;
/* rgb */ color: rgb(100, 107, 185);
/* oklch */ color: oklch(55.8% 0.120 277.9);

Tailwind

colors: {
  custom: {
    50: '#9595ce',
    500: '#646bb9',
    950: '#000000',
  },
}

SCSS

$custom: #646bb9;
$custom-light: #9595ce;
$custom-dark: #000000;

JSON

{
  "hex": "#646bb9",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 185
  },
  "hsl": {
    "h": 235.059,
    "s": 37.778,
    "l": 55.882
  },
  "oklch": {
    "l": 0.5579,
    "c": 0.12024,
    "h": 277.9
  },
  "luminance": 0.16727
}

Semantic roles & 50–950 ramp

primary

#646BB9

secondary

#CECBAB

accent

#C45ACE

background

#F9F9FC

surface

#F2F1F9

border

#CCCBD2

text

#0E0D14

muted

#7E7E82

Preview Lab

Preview with #646BB9

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

Preview Lab → · Contrast checker → · Palette generator →