#646D99#646D99

#646D99 is a mid, moderate blue. Relative luminance 0.159; OKLCH L 54.5% C 0.070 H 275.0°. Best body text is #FFFFFF at 5.01:1 contrast (WCAG AA passes).

Color values

HEX	#646D99
RGB	rgb(100, 109, 153)
HSL	hsl(230, 21%, 50%)
HSV	hsv(230, 35%, 60%)
CMYK	cmyk(34.6%, 28.8%, 0%, 40%)
CIE-LAB	lab(46.90, 7.63, -24.99)
CIE-LCH	lch(46.90, 26.13, 286.98°)
OKLab	oklab(54.5% 0.006 -0.0694)
OKLCH	oklch(54.5% 0.07 275)
XYZ	xyz(16.4723, 15.9459, 32.3408)
Luminance	0.1595 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646D99 #999064

analogous

#648899 #646D99 #756499

triadic

#646D99 #99646D #6D9964

tetradic

#646D99 #996488 #999064 #649975

square

#646D99 #996488 #999064 #649975

split-complementary

#646D99 #997564 #889964

monochromatic

#34384F #4C5374 #646D99 #8990B2 #AEB2CA

Accessibility & contrast

On white

5.01

#646D99 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.19

#646D99 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646D99

5.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646D99	#FFFFFF	#000000	##FFFFFF
##646D99	1.00	5.01	4.19	5.01
#FFFFFF	5.01	1.00	21.00	1.00
#000000	4.19	21.00	1.00	21.00
##FFFFFF	5.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F719B

Deuteranopia (green-blind)

#5B6D98

Tritanopia (blue-blind)

#55757C

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #646d99;
/* rgb */ color: rgb(100, 109, 153);
/* oklch */ color: oklch(54.5% 0.070 275.0);

Tailwind

colors: {
  custom: {
    50: '#9296b7',
    500: '#646d99',
    950: '#000000',
  },
}

SCSS

$custom: #646d99;
$custom-light: #9296b7;
$custom-dark: #000000;

JSON

{
  "hex": "#646d99",
  "rgb": {
    "r": 100,
    "g": 109,
    "b": 153
  },
  "hsl": {
    "h": 229.811,
    "s": 20.949,
    "l": 49.608
  },
  "oklch": {
    "l": 0.54503,
    "c": 0.06968,
    "h": 275
  },
  "luminance": 0.15947
}

Semantic roles & 50–950 ramp

primary

#646D99

secondary

#B9B4A0

accent

#AF6ABE

background

#F9F9FB

surface

#F1F2F6

border

#CBCCD0

text

#0D0D11

muted

#7E7E80

Preview Lab

Preview with #646D99

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

Preview Lab → · Contrast checker → · Palette generator →