#646B99#646B99

#646B99 is a mid, moderate blue. Relative luminance 0.155; OKLCH L 54.1% C 0.072 H 277.0°. Best body text is #FFFFFF at 5.12:1 contrast (WCAG AA passes).

Color values

HEX	#646B99
RGB	rgb(100, 107, 153)
HSL	hsl(232, 21%, 50%)
HSV	hsv(232, 35%, 60%)
CMYK	cmyk(34.6%, 30.1%, 0%, 40%)
CIE-LAB	lab(46.34, 8.85, -25.86)
CIE-LCH	lch(46.34, 27.33, 288.89°)
OKLab	oklab(54.07% 0.0089 -0.0719)
OKLCH	oklch(54.07% 0.072 277)
XYZ	xyz(16.2614, 15.5241, 32.2705)
Luminance	0.1552 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646B99 #999264

analogous

#648699 #646B99 #776499

triadic

#646B99 #99646B #6B9964

tetradic

#646B99 #996486 #999264 #649977

square

#646B99 #996486 #999264 #649977

split-complementary

#646B99 #997764 #869964

monochromatic

#34374F #4C5174 #646B99 #898EB2 #AEB1CA

Accessibility & contrast

On white

5.12

#646B99 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.10

#646B99 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646B99

5.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646B99	#FFFFFF	#000000	##FFFFFF
##646B99	1.00	5.12	4.10	5.12
#FFFFFF	5.12	1.00	21.00	1.00
#000000	4.10	21.00	1.00	21.00
##FFFFFF	5.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D709B

Deuteranopia (green-blind)

#596C98

Tritanopia (blue-blind)

#55747B

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #646b99;
/* rgb */ color: rgb(100, 107, 153);
/* oklch */ color: oklch(54.1% 0.072 277.0);

Tailwind

colors: {
  custom: {
    50: '#9295b7',
    500: '#646b99',
    950: '#000000',
  },
}

SCSS

$custom: #646b99;
$custom-light: #9295b7;
$custom-dark: #000000;

JSON

{
  "hex": "#646b99",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 153
  },
  "hsl": {
    "h": 232.075,
    "s": 20.949,
    "l": 49.608
  },
  "oklch": {
    "l": 0.54069,
    "c": 0.07245,
    "h": 277
  },
  "luminance": 0.15525
}

Semantic roles & 50–950 ramp

primary

#646B99

secondary

#B9B5A0

accent

#B36ABE

background

#F9F9FB

surface

#F1F1F6

border

#CBCBD0

text

#0D0D11

muted

#7E7E80

Preview Lab

Preview with #646B99

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

Preview Lab → · Contrast checker → · Palette generator →