#646DB2#646DB2

#646DB2 is a mid, moderate blue. Relative luminance 0.169; OKLCH L 55.8% C 0.107 H 276.7°. Best body text is #FFFFFF at 4.80:1 contrast (WCAG AA passes).

Color values

HEX	#646DB2
RGB	rgb(100, 109, 178)
HSL	hsl(233, 34%, 55%)
HSV	hsv(233, 44%, 70%)
CMYK	cmyk(43.8%, 38.8%, 0%, 30.2%)
CIE-LAB	lab(48.08, 14.88, -37.80)
CIE-LCH	lch(48.08, 40.62, 291.50°)
OKLab	oklab(55.8% 0.0125 -0.1065)
OKLCH	oklch(55.8% 0.107 276.7)
XYZ	xyz(18.7576, 16.8600, 44.3768)
Luminance	0.1686 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646DB2 #B2A964

analogous

#6494B2 #646DB2 #8264B2

triadic

#646DB2 #B2646D #6DB264

tetradic

#646DB2 #B26494 #B2A964 #64B282

square

#646DB2 #B26494 #B2A964 #64B282

split-complementary

#646DB2 #B28264 #94B264

monochromatic

#343A68 #485091 #646DB2 #8D94C6 #B6BADB

Accessibility & contrast

On white

4.80

#646DB2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.37

#646DB2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646DB2

4.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646DB2	#FFFFFF	#000000	##FFFFFF
##646DB2	1.00	4.80	4.37	4.80
#FFFFFF	4.80	1.00	21.00	1.00
#000000	4.37	21.00	1.00	21.00
##FFFFFF	4.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5475B5

Deuteranopia (green-blind)

#4E6FB0

Tritanopia (blue-blind)

#4A7B87

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #646db2;
/* rgb */ color: rgb(100, 109, 178);
/* oklch */ color: oklch(55.8% 0.107 276.7);

Tailwind

colors: {
  custom: {
    50: '#9496c9',
    500: '#646db2',
    950: '#000000',
  },
}

SCSS

$custom: #646db2;
$custom-light: #9496c9;
$custom-dark: #000000;

JSON

{
  "hex": "#646db2",
  "rgb": {
    "r": 100,
    "g": 109,
    "b": 178
  },
  "hsl": {
    "h": 233.077,
    "s": 33.621,
    "l": 54.51
  },
  "oklch": {
    "l": 0.55801,
    "c": 0.10719,
    "h": 276.7
  },
  "luminance": 0.16861
}

Semantic roles & 50–950 ramp

primary

#646DB2

secondary

#C9C6A8

accent

#BD5ECA

background

#F9F9FC

surface

#F2F2F8

border

#CCCCD1

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #646DB2

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

Preview Lab → · Contrast checker → · Palette generator →