#646DB5#646DB5

#646DB5 is a mid, moderate blue. Relative luminance 0.170; OKLCH L 56.0% C 0.112 H 276.8°. Best body text is #FFFFFF at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#646DB5
RGB	rgb(100, 109, 181)
HSL	hsl(233, 35%, 55%)
HSV	hsv(233, 45%, 71%)
CMYK	cmyk(44.8%, 39.8%, 0%, 29%)
CIE-LAB	lab(48.24, 15.79, -39.30)
CIE-LCH	lch(48.24, 42.35, 291.89°)
OKLab	oklab(55.97% 0.0131 -0.1108)
OKLCH	oklch(55.97% 0.112 276.8)
XYZ	xyz(19.0621, 16.9818, 45.9805)
Luminance	0.1698 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646DB5 #B5AC64

analogous

#6496B5 #646DB5 #8364B5

triadic

#646DB5 #B5646D #6DB564

tetradic

#646DB5 #B56496 #B5AC64 #64B583

square

#646DB5 #B56496 #B5AC64 #64B583

split-complementary

#646DB5 #B58364 #96B564

monochromatic

#33396B #475095 #646DB5 #8D94C9 #B7BBDD

Accessibility & contrast

On white

4.78

#646DB5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.40

#646DB5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646DB5

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646DB5	#FFFFFF	#000000	##FFFFFF
##646DB5	1.00	4.78	4.40	4.78
#FFFFFF	4.78	1.00	21.00	1.00
#000000	4.40	21.00	1.00	21.00
##FFFFFF	4.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5376B8

Deuteranopia (green-blind)

#4C6FB3

Tritanopia (blue-blind)

#487C88

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #646db5;
/* rgb */ color: rgb(100, 109, 181);
/* oklch */ color: oklch(56.0% 0.112 276.8);

Tailwind

colors: {
  custom: {
    50: '#9496cb',
    500: '#646db5',
    950: '#000000',
  },
}

SCSS

$custom: #646db5;
$custom-light: #9496cb;
$custom-dark: #000000;

JSON

{
  "hex": "#646db5",
  "rgb": {
    "r": 100,
    "g": 109,
    "b": 181
  },
  "hsl": {
    "h": 233.333,
    "s": 35.371,
    "l": 55.098
  },
  "oklch": {
    "l": 0.55969,
    "c": 0.11161,
    "h": 276.8
  },
  "luminance": 0.16983
}

Semantic roles & 50–950 ramp

primary

#646DB5

secondary

#CBC8A9

accent

#BF5CCB

background

#F9F9FC

surface

#F2F2F8

border

#CCCCD1

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #646DB5

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

Preview Lab → · Contrast checker → · Palette generator →