#646FBB#646FBB

#646FBB is a mid, moderate blue. Relative luminance 0.177; OKLCH L 56.7% C 0.118 H 275.8°. Best body text is #FFFFFF at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#646FBB
RGB	rgb(100, 111, 187)
HSL	hsl(232, 39%, 56%)
HSV	hsv(232, 47%, 73%)
CMYK	cmyk(46.5%, 40.6%, 0%, 26.7%)
CIE-LAB	lab(49.09, 16.38, -41.42)
CIE-LCH	lch(49.09, 44.55, 291.58°)
OKLab	oklab(56.72% 0.0118 -0.117)
OKLCH	oklch(56.72% 0.118 275.8)
XYZ	xyz(19.9068, 17.6650, 49.3648)
Luminance	0.1767 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646FBB #BBB064

analogous

#649BBB #646FBB #8564BB

triadic

#646FBB #BB646F #6FBB64

tetradic

#646FBB #BB649B #BBB064 #64BB85

square

#646FBB #BB649B #BBB064 #64BB85

split-complementary

#646FBB #BB8564 #9BBB64

monochromatic

#323A72 #45509D #646FBB #8F97CE #B9BEE0

Accessibility & contrast

On white

4.63

#646FBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.53

#646FBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #646FBB

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646FBB	#FFFFFF	#000000	##FFFFFF
##646FBB	1.00	4.63	4.53	4.63
#FFFFFF	4.63	1.00	21.00	1.00
#000000	4.53	21.00	1.00	21.00
##FFFFFF	4.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5278BE

Deuteranopia (green-blind)

#4B71B9

Tritanopia (blue-blind)

#457F8C

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #646fbb;
/* rgb */ color: rgb(100, 111, 187);
/* oklch */ color: oklch(56.7% 0.118 275.8);

Tailwind

colors: {
  custom: {
    50: '#9598d0',
    500: '#646fbb',
    950: '#000000',
  },
}

SCSS

$custom: #646fbb;
$custom-light: #9598d0;
$custom-dark: #000000;

JSON

{
  "hex": "#646fbb",
  "rgb": {
    "r": 100,
    "g": 111,
    "b": 187
  },
  "hsl": {
    "h": 232.414,
    "s": 39.013,
    "l": 56.275
  },
  "oklch": {
    "l": 0.56723,
    "c": 0.11763,
    "h": 275.8
  },
  "luminance": 0.17666
}

Semantic roles & 50–950 ramp

primary

#646FBB

secondary

#CFCBAB

accent

#C059CF

background

#F9F9FC

surface

#F2F2F9

border

#CCCCD2

text

#0E0D14

muted

#7E7E82

Preview Lab

Preview with #646FBB

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

Preview Lab → · Contrast checker → · Palette generator →