#646AC7#646AC7

#646AC7 is a mid, vivid blue. Relative luminance 0.171; OKLCH L 56.4% C 0.142 H 278.0°. Best body text is #FFFFFF at 4.74:1 contrast (WCAG AA passes).

Color values

HEX	#646AC7
RGB	rgb(100, 106, 199)
HSL	hsl(236, 47%, 59%)
HSV	hsv(236, 50%, 78%)
CMYK	cmyk(49.7%, 46.7%, 0%, 22%)
CIE-LAB	lab(48.44, 23.16, -49.37)
CIE-LCH	lch(48.44, 54.53, 295.13°)
OKLab	oklab(56.44% 0.0198 -0.1403)
OKLCH	oklch(56.44% 0.142 278)
XYZ	xyz(20.7152, 17.1397, 56.2385)
Luminance	0.1714 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646AC7 #C7C164

analogous

#649BC7 #646AC7 #8F64C7

triadic

#646AC7 #C7646A #6AC764

tetradic

#646AC7 #C7649B #C7C164 #64C78F

square

#646AC7 #C7649B #C7C164 #64C78F

split-complementary

#646AC7 #C78F64 #9BC764

monochromatic

#2F3482 #3F46AF #646AC7 #9195D7 #BEC0E7

Accessibility & contrast

On white

4.74

#646AC7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.43

#646AC7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646AC7

4.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646AC7	#FFFFFF	#000000	##FFFFFF
##646AC7	1.00	4.74	4.43	4.74
#FFFFFF	4.74	1.00	21.00	1.00
#000000	4.43	21.00	1.00	21.00
##FFFFFF	4.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4277CA

Deuteranopia (green-blind)

#396FC5

Tritanopia (blue-blind)

#3D7E8F

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #646ac7;
/* rgb */ color: rgb(100, 106, 199);
/* oklch */ color: oklch(56.4% 0.142 278.0);

Tailwind

colors: {
  custom: {
    50: '#9694d8',
    500: '#646ac7',
    950: '#000000',
  },
}

SCSS

$custom: #646ac7;
$custom-light: #9694d8;
$custom-dark: #000000;

JSON

{
  "hex": "#646ac7",
  "rgb": {
    "r": 100,
    "g": 106,
    "b": 199
  },
  "hsl": {
    "h": 236.364,
    "s": 46.919,
    "l": 58.627
  },
  "oklch": {
    "l": 0.56442,
    "c": 0.14174,
    "h": 278
  },
  "luminance": 0.17141
}

Semantic roles & 50–950 ramp

primary

#646AC7

secondary

#D7D5B0

accent

#CE51D7

background

#F9F9FD

surface

#F2F1FA

border

#CCCBD3

text

#0E0D14

muted

#7E7E83

Preview Lab

Preview with #646AC7

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

Preview Lab → · Contrast checker → · Palette generator →