#646ACB#646ACB

#646ACB is a mid, vivid blue. Relative luminance 0.173; OKLCH L 56.7% C 0.147 H 277.9°. Best body text is #FFFFFF at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#646ACB
RGB	rgb(100, 106, 203)
HSL	hsl(237, 50%, 59%)
HSV	hsv(237, 51%, 80%)
CMYK	cmyk(50.7%, 47.8%, 0%, 20.4%)
CIE-LAB	lab(48.67, 24.41, -51.29)
CIE-LCH	lch(48.67, 56.80, 295.45°)
OKLab	oklab(56.7% 0.0203 -0.146)
OKLCH	oklch(56.7% 0.147 277.9)
XYZ	xyz(21.1857, 17.3279, 58.7166)
Luminance	0.1733 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646ACB #CBC564

analogous

#649ECB #646ACB #9264CB

triadic

#646ACB #CB646A #6ACB64

tetradic

#646ACB #CB649E #CBC564 #64CB92

square

#646ACB #CB649E #CBC564 #64CB92

split-complementary

#646ACB #CB9264 #9ECB64

monochromatic

#2D3387 #3D44B5 #646ACB #9296DA #C0C2EA

Accessibility & contrast

On white

4.70

#646ACB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.47

#646ACB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646ACB

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646ACB	#FFFFFF	#000000	##FFFFFF
##646ACB	1.00	4.70	4.47	4.70
#FFFFFF	4.70	1.00	21.00	1.00
#000000	4.47	21.00	1.00	21.00
##FFFFFF	4.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E78CF

Deuteranopia (green-blind)

#3470C9

Tritanopia (blue-blind)

#3A7F91

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #646acb;
/* rgb */ color: rgb(100, 106, 203);
/* oklch */ color: oklch(56.7% 0.147 277.9);

Tailwind

colors: {
  custom: {
    50: '#9794db',
    500: '#646acb',
    950: '#000000',
  },
}

SCSS

$custom: #646acb;
$custom-light: #9794db;
$custom-dark: #000000;

JSON

{
  "hex": "#646acb",
  "rgb": {
    "r": 100,
    "g": 106,
    "b": 203
  },
  "hsl": {
    "h": 236.505,
    "s": 49.758,
    "l": 59.412
  },
  "oklch": {
    "l": 0.56696,
    "c": 0.14738,
    "h": 277.9
  },
  "luminance": 0.17329
}

Semantic roles & 50–950 ramp

primary

#646ACB

secondary

#D9D7B1

accent

#D14FD9

background

#F9F9FD

surface

#F2F1FB

border

#CCCBD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #646ACB

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

Preview Lab → · Contrast checker → · Palette generator →