#646CD3#646CD3

#646CD3 is a mid, vivid blue. Relative luminance 0.181; OKLCH L 57.6% C 0.156 H 277.0°. Best body text is #000000 at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#646CD3
RGB	rgb(100, 108, 211)
HSL	hsl(236, 56%, 61%)
HSV	hsv(236, 53%, 83%)
CMYK	cmyk(52.6%, 48.8%, 0%, 17.3%)
CIE-LAB	lab(49.66, 25.70, -54.27)
CIE-LCH	lch(49.66, 60.05, 295.34°)
OKLab	oklab(57.6% 0.0189 -0.1547)
OKLCH	oklch(57.6% 0.156 277)
XYZ	xyz(22.3723, 18.1362, 63.9371)
Luminance	0.1814 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646CD3 #D3CB64

analogous

#64A3D3 #646CD3 #9364D3

triadic

#646CD3 #D3646C #6CD364

tetradic

#646CD3 #D364A3 #D3CB64 #64D393

square

#646CD3 #D364A3 #D3CB64 #64D393

split-complementary

#646CD3 #D39364 #A3D364

monochromatic

#2A3193 #3741C3 #646CD3 #9499E1 #C3C6EE

Accessibility & contrast

On white

4.54

#646CD3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.63

#646CD3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #646CD3

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646CD3	#FFFFFF	#000000	##000000
##646CD3	1.00	4.54	4.63	4.63
#FFFFFF	4.54	1.00	21.00	21.00
#000000	4.63	21.00	1.00	1.00
##000000	4.63	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B7BD7

Deuteranopia (green-blind)

#2E72D1

Tritanopia (blue-blind)

#328395

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #646cd3;
/* rgb */ color: rgb(100, 108, 211);
/* oklch */ color: oklch(57.6% 0.156 277.0);

Tailwind

colors: {
  custom: {
    50: '#9896e1',
    500: '#646cd3',
    950: '#000000',
  },
}

SCSS

$custom: #646cd3;
$custom-light: #9896e1;
$custom-dark: #000000;

JSON

{
  "hex": "#646cd3",
  "rgb": {
    "r": 100,
    "g": 108,
    "b": 211
  },
  "hsl": {
    "h": 235.676,
    "s": 55.779,
    "l": 60.98
  },
  "oklch": {
    "l": 0.57599,
    "c": 0.15587,
    "h": 277
  },
  "luminance": 0.18138
}

Semantic roles & 50–950 ramp

primary

#646CD3

secondary

#DEDBB4

accent

#B822C3

background

#F9F9FD

surface

#F2F1FB

border

#CCCBD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #646CD3

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

Preview Lab → · Contrast checker → · Palette generator →