#646BDD#646BDD

#646BDD is a mid, vivid blue. Relative luminance 0.184; OKLCH L 58.1% C 0.171 H 277.0°. Best body text is #000000 at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#646BDD
RGB	rgb(100, 107, 221)
HSL	hsl(237, 64%, 63%)
HSV	hsv(237, 55%, 87%)
CMYK	cmyk(54.8%, 51.6%, 0%, 13.3%)
CIE-LAB	lab(50.03, 29.48, -59.35)
CIE-LCH	lch(50.03, 66.27, 296.41°)
OKLab	oklab(58.08% 0.0209 -0.1697)
OKLCH	oklch(58.08% 0.171 277)
XYZ	xyz(23.5602, 18.4436, 70.7111)
Luminance	0.1845 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646BDD #DDD664

analogous

#64A7DD #646BDD #9964DD

triadic

#646BDD #DD646B #6BDD64

tetradic

#646BDD #DD64A7 #DDD664 #64DD99

square

#646BDD #DD64A7 #DDD664 #64DD99

split-complementary

#646BDD #DD9964 #A7DD64

monochromatic

#242BA3 #323BD2 #646BDD #969BE8 #C8CBF3

Accessibility & contrast

On white

4.48

#646BDD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.69

#646BDD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #646BDD

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646BDD	#FFFFFF	#000000	##000000
##646BDD	1.00	4.48	4.69	4.69
#FFFFFF	4.48	1.00	21.00	21.00
#000000	4.69	21.00	1.00	1.00
##000000	4.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D7CE1

Deuteranopia (green-blind)

#1772DB

Tritanopia (blue-blind)

#26859A

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #646bdd;
/* rgb */ color: rgb(100, 107, 221);
/* oklch */ color: oklch(58.1% 0.171 277.0);

Tailwind

colors: {
  custom: {
    50: '#9995e8',
    500: '#646bdd',
    950: '#000000',
  },
}

SCSS

$custom: #646bdd;
$custom-light: #9995e8;
$custom-dark: #000000;

JSON

{
  "hex": "#646bdd",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 221
  },
  "hsl": {
    "h": 236.529,
    "s": 64.021,
    "l": 62.941
  },
  "oklch": {
    "l": 0.58076,
    "c": 0.17094,
    "h": 277
  },
  "luminance": 0.18445
}

Semantic roles & 50–950 ramp

primary

#646BDD

secondary

#E4E2B9

accent

#C21ACC

background

#F9F9FE

surface

#F2F1FD

border

#CCCBD5

text

#0F0D16

muted

#7E7E84

Preview Lab

Preview with #646BDD

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

Preview Lab → · Contrast checker → · Palette generator →