#646FAB#646FAB

#646FAB is a mid, moderate blue. Relative luminance 0.170; OKLCH L 55.8% C 0.094 H 275.0°. Best body text is #FFFFFF at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#646FAB
RGB	rgb(100, 111, 171)
HSL	hsl(231, 30%, 53%)
HSV	hsv(231, 42%, 67%)
CMYK	cmyk(41.5%, 35.1%, 0%, 32.9%)
CIE-LAB	lab(48.28, 11.58, -33.41)
CIE-LCH	lch(48.28, 35.36, 289.12°)
OKLab	oklab(55.84% 0.0083 -0.0937)
OKLCH	oklch(55.84% 0.094 275)
XYZ	xyz(18.2884, 17.0176, 40.8413)
Luminance	0.1702 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646FAB #ABA064

analogous

#6492AB #646FAB #7C64AB

triadic

#646FAB #AB646F #6FAB64

tetradic

#646FAB #AB6492 #ABA064 #64AB7C

square

#646FAB #AB6492 #ABA064 #64AB7C

split-complementary

#646FAB #AB7C64 #92AB64

monochromatic

#343B60 #4A5388 #646FAB #8C94C1 #B3B9D6

Accessibility & contrast

On white

4.77

#646FAB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.40

#646FAB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646FAB

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646FAB	#FFFFFF	#000000	##FFFFFF
##646FAB	1.00	4.77	4.40	4.77
#FFFFFF	4.77	1.00	21.00	1.00
#000000	4.40	21.00	1.00	21.00
##FFFFFF	4.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A76AD

Deuteranopia (green-blind)

#5570AA

Tritanopia (blue-blind)

#4D7B85

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #646fab;
/* rgb */ color: rgb(100, 111, 171);
/* oklch */ color: oklch(55.8% 0.094 275.0);

Tailwind

colors: {
  custom: {
    50: '#9398c4',
    500: '#646fab',
    950: '#000000',
  },
}

SCSS

$custom: #646fab;
$custom-light: #9398c4;
$custom-dark: #000000;

JSON

{
  "hex": "#646fab",
  "rgb": {
    "r": 100,
    "g": 111,
    "b": 171
  },
  "hsl": {
    "h": 230.704,
    "s": 29.707,
    "l": 53.137
  },
  "oklch": {
    "l": 0.5584,
    "c": 0.09405,
    "h": 275
  },
  "luminance": 0.17018
}

Semantic roles & 50–950 ramp

primary

#646FAB

secondary

#C5C0A6

accent

#B662C6

background

#F9F9FC

surface

#F2F2F8

border

#CCCCD1

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #646FAB

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

Preview Lab → · Contrast checker → · Palette generator →