#646CB0#646CB0

#646CB0 is a mid, moderate blue. Relative luminance 0.166; OKLCH L 55.5% C 0.106 H 277.3°. Best body text is #FFFFFF at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#646CB0
RGB	rgb(100, 108, 176)
HSL	hsl(234, 32%, 54%)
HSV	hsv(234, 43%, 69%)
CMYK	cmyk(43.2%, 38.6%, 0%, 31%)
CIE-LAB	lab(47.71, 14.90, -37.22)
CIE-LCH	lch(47.71, 40.09, 291.82°)
OKLab	oklab(55.48% 0.0134 -0.1048)
OKLCH	oklch(55.48% 0.106 277.3)
XYZ	xyz(18.4522, 16.5682, 43.2916)
Luminance	0.1657 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646CB0 #B0A864

analogous

#6492B0 #646CB0 #8264B0

triadic

#646CB0 #B0646C #6CB064

tetradic

#646CB0 #B06492 #B0A864 #64B082

square

#646CB0 #B06492 #B0A864 #64B082

split-complementary

#646CB0 #B08264 #92B064

monochromatic

#343966 #49508E #646CB0 #8D92C5 #B5B9D9

Accessibility & contrast

On white

4.87

#646CB0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.31

#646CB0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646CB0

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646CB0	#FFFFFF	#000000	##FFFFFF
##646CB0	1.00	4.87	4.31	4.87
#FFFFFF	4.87	1.00	21.00	1.00
#000000	4.31	21.00	1.00	21.00
##FFFFFF	4.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5474B3

Deuteranopia (green-blind)

#4E6EAE

Tritanopia (blue-blind)

#4B7A85

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #646cb0;
/* rgb */ color: rgb(100, 108, 176);
/* oklch */ color: oklch(55.5% 0.106 277.3);

Tailwind

colors: {
  custom: {
    50: '#9496c8',
    500: '#646cb0',
    950: '#000000',
  },
}

SCSS

$custom: #646cb0;
$custom-light: #9496c8;
$custom-dark: #000000;

JSON

{
  "hex": "#646cb0",
  "rgb": {
    "r": 100,
    "g": 108,
    "b": 176
  },
  "hsl": {
    "h": 233.684,
    "s": 32.479,
    "l": 54.118
  },
  "oklch": {
    "l": 0.55482,
    "c": 0.10563,
    "h": 277.3
  },
  "luminance": 0.16569
}

Semantic roles & 50–950 ramp

primary

#646CB0

secondary

#C8C5A8

accent

#BE5FC9

background

#F9F9FC

surface

#F2F1F8

border

#CCCBD1

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #646CB0

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

Preview Lab → · Contrast checker → · Palette generator →