#646DB3#646DB3

#646DB3 is a mid, moderate blue. Relative luminance 0.169; OKLCH L 55.9% C 0.109 H 276.7°. Best body text is #FFFFFF at 4.79:1 contrast (WCAG AA passes).

Color values

HEX	#646DB3
RGB	rgb(100, 109, 179)
HSL	hsl(233, 34%, 55%)
HSV	hsv(233, 44%, 70%)
CMYK	cmyk(44.1%, 39.1%, 0%, 29.8%)
CIE-LAB	lab(48.13, 15.19, -38.30)
CIE-LCH	lch(48.13, 41.20, 291.63°)
OKLab	oklab(55.86% 0.0127 -0.1079)
OKLCH	oklch(55.86% 0.109 276.7)
XYZ	xyz(18.8584, 16.9003, 44.9075)
Luminance	0.1690 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646DB3 #B3AA64

analogous

#6494B3 #646DB3 #8364B3

triadic

#646DB3 #B3646D #6DB364

tetradic

#646DB3 #B36494 #B3AA64 #64B383

square

#646DB3 #B36494 #B3AA64 #64B383

split-complementary

#646DB3 #B38364 #94B364

monochromatic

#343A69 #485092 #646DB3 #8D94C7 #B6BADB

Accessibility & contrast

On white

4.79

#646DB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.38

#646DB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646DB3

4.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646DB3	#FFFFFF	#000000	##FFFFFF
##646DB3	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)

#5476B6

Deuteranopia (green-blind)

#4E6FB1

Tritanopia (blue-blind)

#4A7B87

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #646db3;
/* rgb */ color: rgb(100, 109, 179);
/* oklch */ color: oklch(55.9% 0.109 276.7);

Tailwind

colors: {
  custom: {
    50: '#9496ca',
    500: '#646db3',
    950: '#000000',
  },
}

SCSS

$custom: #646db3;
$custom-light: #9496ca;
$custom-dark: #000000;

JSON

{
  "hex": "#646db3",
  "rgb": {
    "r": 100,
    "g": 109,
    "b": 179
  },
  "hsl": {
    "h": 233.165,
    "s": 34.199,
    "l": 54.706
  },
  "oklch": {
    "l": 0.55857,
    "c": 0.10867,
    "h": 276.7
  },
  "luminance": 0.16901
}

Semantic roles & 50–950 ramp

primary

#646DB3

secondary

#CAC6A9

accent

#BE5ECA

background

#F9F9FC

surface

#F2F2F8

border

#CCCCD1

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #646DB3

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

Preview Lab → · Contrast checker → · Palette generator →