#646B9F#646B9F

#646B9F is a mid, moderate blue. Relative luminance 0.157; OKLCH L 54.4% C 0.082 H 277.4°. Best body text is #FFFFFF at 5.07:1 contrast (WCAG AA passes).

Color values

HEX	#646B9F
RGB	rgb(100, 107, 159)
HSL	hsl(233, 24%, 51%)
HSV	hsv(233, 37%, 62%)
CMYK	cmyk(37.1%, 32.7%, 0%, 37.6%)
CIE-LAB	lab(46.61, 10.54, -28.98)
CIE-LCH	lch(46.61, 30.84, 289.99°)
OKLab	oklab(54.37% 0.0106 -0.0809)
OKLCH	oklch(54.37% 0.082 277.4)
XYZ	xyz(16.7694, 15.7273, 34.9463)
Luminance	0.1573 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646B9F #9F9864

analogous

#64889F #646B9F #7A649F

triadic

#646B9F #9F646B #6B9F64

tetradic

#646B9F #9F6488 #9F9864 #649F7A

square

#646B9F #9F6488 #9F9864 #649F7A

split-complementary

#646B9F #9F7A64 #889F64

monochromatic

#343854 #4C517A #646B9F #8A8FB6 #B0B3CE

Accessibility & contrast

On white

5.07

#646B9F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.15

#646B9F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646B9F

5.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646B9F	#FFFFFF	#000000	##FFFFFF
##646B9F	1.00	5.07	4.15	5.07
#FFFFFF	5.07	1.00	21.00	1.00
#000000	4.15	21.00	1.00	21.00
##FFFFFF	5.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A71A1

Deuteranopia (green-blind)

#576C9E

Tritanopia (blue-blind)

#53757E

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #646b9f;
/* rgb */ color: rgb(100, 107, 159);
/* oklch */ color: oklch(54.4% 0.082 277.4);

Tailwind

colors: {
  custom: {
    50: '#9295bb',
    500: '#646b9f',
    950: '#000000',
  },
}

SCSS

$custom: #646b9f;
$custom-light: #9295bb;
$custom-dark: #000000;

JSON

{
  "hex": "#646b9f",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 159
  },
  "hsl": {
    "h": 232.881,
    "s": 23.506,
    "l": 50.784
  },
  "oklch": {
    "l": 0.54368,
    "c": 0.08158,
    "h": 277.4
  },
  "luminance": 0.15728
}

Semantic roles & 50–950 ramp

primary

#646B9F

secondary

#BCB9A2

accent

#B668C0

background

#F9F9FB

surface

#F1F1F6

border

#CBCBD0

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #646B9F

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

Preview Lab → · Contrast checker → · Palette generator →