#646F99#646F99

#646F99 is a mid, moderate blue. Relative luminance 0.164; OKLCH L 54.9% C 0.067 H 272.7°. Best body text is #FFFFFF at 4.91:1 contrast (WCAG AA passes).

Color values

HEX	#646F99
RGB	rgb(100, 111, 153)
HSL	hsl(228, 21%, 50%)
HSV	hsv(228, 35%, 60%)
CMYK	cmyk(34.6%, 27.5%, 0%, 40%)
CIE-LAB	lab(47.47, 6.42, -24.12)
CIE-LCH	lch(47.47, 24.96, 284.91°)
OKLab	oklab(54.94% 0.0032 -0.0669)
OKLCH	oklch(54.94% 0.067 272.7)
XYZ	xyz(16.6881, 16.3775, 32.4127)
Luminance	0.1638 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646F99 #998E64

analogous

#648A99 #646F99 #746499

triadic

#646F99 #99646F #6F9964

tetradic

#646F99 #99648A #998E64 #649974

square

#646F99 #99648A #998E64 #649974

split-complementary

#646F99 #997464 #8A9964

monochromatic

#34394F #4C5474 #646F99 #8991B2 #AEB3CA

Accessibility & contrast

On white

4.91

#646F99 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.28

#646F99 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646F99

4.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646F99	#FFFFFF	#000000	##FFFFFF
##646F99	1.00	4.91	4.28	4.91
#FFFFFF	4.91	1.00	21.00	1.00
#000000	4.28	21.00	1.00	21.00
##FFFFFF	4.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#62739B

Deuteranopia (green-blind)

#5E6F98

Tritanopia (blue-blind)

#55777E

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #646f99;
/* rgb */ color: rgb(100, 111, 153);
/* oklch */ color: oklch(54.9% 0.067 272.7);

Tailwind

colors: {
  custom: {
    50: '#9298b7',
    500: '#646f99',
    950: '#000000',
  },
}

SCSS

$custom: #646f99;
$custom-light: #9298b7;
$custom-dark: #000000;

JSON

{
  "hex": "#646f99",
  "rgb": {
    "r": 100,
    "g": 111,
    "b": 153
  },
  "hsl": {
    "h": 227.547,
    "s": 20.949,
    "l": 49.608
  },
  "oklch": {
    "l": 0.5494,
    "c": 0.06701,
    "h": 272.7
  },
  "luminance": 0.16378
}

Semantic roles & 50–950 ramp

primary

#646F99

secondary

#B9B3A0

accent

#AC6ABE

background

#F9F9FB

surface

#F1F2F6

border

#CBCCD0

text

#0D0D11

muted

#7E7E80

Preview Lab

Preview with #646F99

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

Preview Lab → · Contrast checker → · Palette generator →