#646CBC#646CBC

#646CBC is a mid, vivid blue. Relative luminance 0.171; OKLCH L 56.2% C 0.123 H 277.3°. Best body text is #FFFFFF at 4.76:1 contrast (WCAG AA passes).

Color values

HEX	#646CBC
RGB	rgb(100, 108, 188)
HSL	hsl(235, 40%, 56%)
HSV	hsv(235, 47%, 74%)
CMYK	cmyk(46.8%, 42.6%, 0%, 26.3%)
CIE-LAB	lab(48.34, 18.53, -43.19)
CIE-LCH	lch(48.34, 46.99, 293.22°)
OKLab	oklab(56.17% 0.0157 -0.1222)
OKLCH	oklch(56.17% 0.123 277.3)
XYZ	xyz(19.6924, 17.0642, 49.8233)
Luminance	0.1706 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646CBC #BCB464

analogous

#6498BC #646CBC #8864BC

triadic

#646CBC #BC646C #6CBC64

tetradic

#646CBC #BC6498 #BCB464 #64BC88

square

#646CBC #BC6498 #BCB464 #64BC88

split-complementary

#646CBC #BC8864 #98BC64

monochromatic

#323874 #444D9E #646CBC #8F95CE #B9BDE1

Accessibility & contrast

On white

4.76

#646CBC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.41

#646CBC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646CBC

4.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646CBC	#FFFFFF	#000000	##FFFFFF
##646CBC	1.00	4.76	4.41	4.76
#FFFFFF	4.76	1.00	21.00	1.00
#000000	4.41	21.00	1.00	21.00
##FFFFFF	4.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D76BF

Deuteranopia (green-blind)

#466FBA

Tritanopia (blue-blind)

#447D8B

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #646cbc;
/* rgb */ color: rgb(100, 108, 188);
/* oklch */ color: oklch(56.2% 0.123 277.3);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#646cbc",
  "rgb": {
    "r": 100,
    "g": 108,
    "b": 188
  },
  "hsl": {
    "h": 234.545,
    "s": 39.64,
    "l": 56.471
  },
  "oklch": {
    "l": 0.56169,
    "c": 0.12321,
    "h": 277.3
  },
  "luminance": 0.17065
}

Semantic roles & 50–950 ramp

primary

#646CBC

secondary

#D0CDAC

accent

#C558D0

background

#F9F9FC

surface

#F2F1F9

border

#CCCBD2

text

#0E0D14

muted

#7E7E82

Preview Lab

Preview with #646CBC

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

Preview Lab → · Contrast checker → · Palette generator →