#646FAC#646FAC

#646FAC is a mid, moderate blue. Relative luminance 0.171; OKLCH L 55.9% C 0.096 H 275.1°. Best body text is #FFFFFF at 4.76:1 contrast (WCAG AA passes).

Color values

HEX	#646FAC
RGB	rgb(100, 111, 172)
HSL	hsl(231, 30%, 53%)
HSV	hsv(231, 42%, 67%)
CMYK	cmyk(41.9%, 35.5%, 0%, 32.5%)
CIE-LAB	lab(48.33, 11.87, -33.91)
CIE-LCH	lch(48.33, 35.93, 289.30°)
OKLab	oklab(55.89% 0.0085 -0.0952)
OKLCH	oklch(55.89% 0.096 275.1)
XYZ	xyz(18.3841, 17.0559, 41.3452)
Luminance	0.1706 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646FAC #ACA164

analogous

#6493AC #646FAC #7D64AC

triadic

#646FAC #AC646F #6FAC64

tetradic

#646FAC #AC6493 #ACA164 #64AC7D

square

#646FAC #AC6493 #ACA164 #64AC7D

split-complementary

#646FAC #AC7D64 #93AC64

monochromatic

#343B61 #4A5389 #646FAC #8C94C1 #B4B9D7

Accessibility & contrast

On white

4.76

#646FAC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.41

#646FAC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646FAC

4.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646FAC	#FFFFFF	#000000	##FFFFFF
##646FAC	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)

#5A76AE

Deuteranopia (green-blind)

#5470AB

Tritanopia (blue-blind)

#4D7B85

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #646fac;
/* rgb */ color: rgb(100, 111, 172);
/* oklch */ color: oklch(55.9% 0.096 275.1);

Tailwind

colors: {
  custom: {
    50: '#9398c5',
    500: '#646fac',
    950: '#000000',
  },
}

SCSS

$custom: #646fac;
$custom-light: #9398c5;
$custom-dark: #000000;

JSON

{
  "hex": "#646fac",
  "rgb": {
    "r": 100,
    "g": 111,
    "b": 172
  },
  "hsl": {
    "h": 230.833,
    "s": 30.252,
    "l": 53.333
  },
  "oklch": {
    "l": 0.55893,
    "c": 0.09554,
    "h": 275.1
  },
  "luminance": 0.17057
}

Semantic roles & 50–950 ramp

primary

#646FAC

secondary

#C5C1A6

accent

#B761C6

background

#F9F9FC

surface

#F2F2F8

border

#CCCCD1

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #646FAC

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

Preview Lab → · Contrast checker → · Palette generator →