#646CDD#646CDD

#646CDD is a mid, vivid blue. Relative luminance 0.187; OKLCH L 58.3% C 0.170 H 276.7°. Best body text is #000000 at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#646CDD
RGB	rgb(100, 108, 221)
HSL	hsl(236, 64%, 63%)
HSV	hsv(236, 55%, 87%)
CMYK	cmyk(54.8%, 51.1%, 0%, 13.3%)
CIE-LAB	lab(50.28, 28.87, -58.95)
CIE-LCH	lch(50.28, 65.64, 296.09°)
OKLab	oklab(58.26% 0.0198 -0.1685)
OKLCH	oklch(58.26% 0.17 276.7)
XYZ	xyz(23.6651, 18.6533, 70.7460)
Luminance	0.1865 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646CDD #DDD564

analogous

#64A8DD #646CDD #9864DD

triadic

#646CDD #DD646C #6CDD64

tetradic

#646CDD #DD64A8 #DDD564 #64DD98

square

#646CDD #DD64A8 #DDD564 #64DD98

split-complementary

#646CDD #DD9864 #A8DD64

monochromatic

#242CA3 #323CD2 #646CDD #969CE8 #C8CBF3

Accessibility & contrast

On white

4.44

#646CDD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.73

#646CDD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #646CDD

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646CDD	#FFFFFF	#000000	##000000
##646CDD	1.00	4.44	4.73	4.73
#FFFFFF	4.44	1.00	21.00	21.00
#000000	4.73	21.00	1.00	1.00
##000000	4.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#307DE1

Deuteranopia (green-blind)

#1B73DB

Tritanopia (blue-blind)

#26859A

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #646cdd;
/* rgb */ color: rgb(100, 108, 221);
/* oklch */ color: oklch(58.3% 0.170 276.7);

Tailwind

colors: {
  custom: {
    50: '#9996e8',
    500: '#646cdd',
    950: '#000000',
  },
}

SCSS

$custom: #646cdd;
$custom-light: #9996e8;
$custom-dark: #000000;

JSON

{
  "hex": "#646cdd",
  "rgb": {
    "r": 100,
    "g": 108,
    "b": 221
  },
  "hsl": {
    "h": 236.033,
    "s": 64.021,
    "l": 62.941
  },
  "oklch": {
    "l": 0.58263,
    "c": 0.16963,
    "h": 276.7
  },
  "luminance": 0.18655
}

Semantic roles & 50–950 ramp

primary

#646CDD

secondary

#E4E1B9

accent

#C01ACC

background

#F9F9FE

surface

#F2F1FD

border

#CCCBD5

text

#0F0D16

muted

#7E7E84

Preview Lab

Preview with #646CDD

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

Preview Lab → · Contrast checker → · Palette generator →