#646BBD#646BBD

#646BBD is a mid, vivid blue. Relative luminance 0.169; OKLCH L 56.0% C 0.126 H 277.8°. Best body text is #FFFFFF at 4.79:1 contrast (WCAG AA passes).

Color values

HEX	#646BBD
RGB	rgb(100, 107, 189)
HSL	hsl(235, 40%, 57%)
HSV	hsv(235, 47%, 74%)
CMYK	cmyk(47.1%, 43.4%, 0%, 25.9%)
CIE-LAB	lab(48.13, 19.45, -44.10)
CIE-LCH	lch(48.13, 48.20, 293.80°)
OKLab	oklab(56.03% 0.0172 -0.1249)
OKLCH	oklch(56.03% 0.126 277.8)
XYZ	xyz(19.6957, 16.8978, 50.3580)
Luminance	0.1690 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646BBD #BDB664

analogous

#6498BD #646BBD #8A64BD

triadic

#646BBD #BD646B #6BBD64

tetradic

#646BBD #BD6498 #BDB664 #64BD8A

square

#646BBD #BD6498 #BDB664 #64BD8A

split-complementary

#646BBD #BD8A64 #98BD64

monochromatic

#323775 #444BA0 #646BBD #8F94CF #BABDE2

Accessibility & contrast

On white

4.79

#646BBD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.38

#646BBD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646BBD

4.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646BBD	#FFFFFF	#000000	##FFFFFF
##646BBD	1.00	4.79	4.38	4.79
#FFFFFF	4.79	1.00	21.00	1.00
#000000	4.38	21.00	1.00	21.00
##FFFFFF	4.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B76C0

Deuteranopia (green-blind)

#446FBB

Tritanopia (blue-blind)

#447C8B

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #646bbd;
/* rgb */ color: rgb(100, 107, 189);
/* oklch */ color: oklch(56.0% 0.126 277.8);

Tailwind

colors: {
  custom: {
    50: '#9595d1',
    500: '#646bbd',
    950: '#000000',
  },
}

SCSS

$custom: #646bbd;
$custom-light: #9595d1;
$custom-dark: #000000;

JSON

{
  "hex": "#646bbd",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 189
  },
  "hsl": {
    "h": 235.281,
    "s": 40.271,
    "l": 56.667
  },
  "oklch": {
    "l": 0.56027,
    "c": 0.12604,
    "h": 277.8
  },
  "luminance": 0.16899
}

Semantic roles & 50–950 ramp

primary

#646BBD

secondary

#D1CEAC

accent

#C758D0

background

#F9F9FC

surface

#F2F1F9

border

#CCCBD2

text

#0E0D14

muted

#7E7E82

Preview Lab

Preview with #646BBD

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

Preview Lab → · Contrast checker → · Palette generator →