#646CB2#646CB2

#646CB2 is a mid, moderate blue. Relative luminance 0.166; OKLCH L 55.6% C 0.109 H 277.3°. Best body text is #FFFFFF at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#646CB2
RGB	rgb(100, 108, 178)
HSL	hsl(234, 34%, 55%)
HSV	hsv(234, 44%, 70%)
CMYK	cmyk(43.8%, 39.3%, 0%, 30.2%)
CIE-LAB	lab(47.81, 15.50, -38.22)
CIE-LCH	lch(47.81, 41.24, 292.07°)
OKLab	oklab(55.59% 0.0138 -0.1077)
OKLCH	oklch(55.59% 0.109 277.3)
XYZ	xyz(18.6516, 16.6479, 44.3414)
Luminance	0.1665 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646CB2 #B2AA64

analogous

#6493B2 #646CB2 #8364B2

triadic

#646CB2 #B2646C #6CB264

tetradic

#646CB2 #B26493 #B2AA64 #64B283

square

#646CB2 #B26493 #B2AA64 #64B283

split-complementary

#646CB2 #B28364 #93B264

monochromatic

#343968 #484F91 #646CB2 #8D93C6 #B6BADB

Accessibility & contrast

On white

4.85

#646CB2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.33

#646CB2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646CB2

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646CB2	#FFFFFF	#000000	##FFFFFF
##646CB2	1.00	4.85	4.33	4.85
#FFFFFF	4.85	1.00	21.00	1.00
#000000	4.33	21.00	1.00	21.00
##FFFFFF	4.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5375B5

Deuteranopia (green-blind)

#4D6FB0

Tritanopia (blue-blind)

#4A7A86

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #646cb2;
/* rgb */ color: rgb(100, 108, 178);
/* oklch */ color: oklch(55.6% 0.109 277.3);

Tailwind

colors: {
  custom: {
    50: '#9496c9',
    500: '#646cb2',
    950: '#000000',
  },
}

SCSS

$custom: #646cb2;
$custom-light: #9496c9;
$custom-dark: #000000;

JSON

{
  "hex": "#646cb2",
  "rgb": {
    "r": 100,
    "g": 108,
    "b": 178
  },
  "hsl": {
    "h": 233.846,
    "s": 33.621,
    "l": 54.51
  },
  "oklch": {
    "l": 0.55594,
    "c": 0.10858,
    "h": 277.3
  },
  "luminance": 0.16649
}

Semantic roles & 50–950 ramp

primary

#646CB2

secondary

#C9C6A8

accent

#BF5ECA

background

#F9F9FC

surface

#F2F1F8

border

#CCCBD1

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #646CB2

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

Preview Lab → · Contrast checker → · Palette generator →