#646DBC#646DBC

#646DBC is a mid, vivid blue. Relative luminance 0.173; OKLCH L 56.4% C 0.122 H 276.8°. Best body text is #FFFFFF at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#646DBC
RGB	rgb(100, 109, 188)
HSL	hsl(234, 40%, 56%)
HSV	hsv(234, 47%, 74%)
CMYK	cmyk(46.8%, 42%, 0%, 26.3%)
CIE-LAB	lab(48.61, 17.92, -42.76)
CIE-LCH	lch(48.61, 46.37, 292.73°)
OKLab	oklab(56.37% 0.0145 -0.121)
OKLCH	oklch(56.37% 0.122 276.8)
XYZ	xyz(19.7985, 17.2764, 49.8587)
Luminance	0.1728 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646DBC #BCB364

analogous

#6499BC #646DBC #8764BC

triadic

#646DBC #BC646D #6DBC64

tetradic

#646DBC #BC6499 #BCB364 #64BC87

square

#646DBC #BC6499 #BCB364 #64BC87

split-complementary

#646DBC #BC8764 #99BC64

monochromatic

#323974 #444E9E #646DBC #8F95CE #B9BDE1

Accessibility & contrast

On white

4.71

#646DBC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.46

#646DBC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646DBC

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646DBC	#FFFFFF	#000000	##FFFFFF
##646DBC	1.00	4.71	4.46	4.71
#FFFFFF	4.71	1.00	21.00	1.00
#000000	4.46	21.00	1.00	21.00
##FFFFFF	4.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F77BF

Deuteranopia (green-blind)

#4770BA

Tritanopia (blue-blind)

#447D8B

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #646dbc;
/* rgb */ color: rgb(100, 109, 188);
/* oklch */ color: oklch(56.4% 0.122 276.8);

Tailwind

colors: {
  custom: {
    50: '#9596d0',
    500: '#646dbc',
    950: '#000000',
  },
}

SCSS

$custom: #646dbc;
$custom-light: #9596d0;
$custom-dark: #000000;

JSON

{
  "hex": "#646dbc",
  "rgb": {
    "r": 100,
    "g": 109,
    "b": 188
  },
  "hsl": {
    "h": 233.864,
    "s": 39.64,
    "l": 56.471
  },
  "oklch": {
    "l": 0.56372,
    "c": 0.12183,
    "h": 276.8
  },
  "luminance": 0.17277
}

Semantic roles & 50–950 ramp

primary

#646DBC

secondary

#D0CCAC

accent

#C358D0

background

#F9F9FC

surface

#F2F2F9

border

#CCCCD2

text

#0E0D14

muted

#7E7E82

Preview Lab

Preview with #646DBC

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

Preview Lab → · Contrast checker → · Palette generator →