#646FDF#646FDF

#646FDF is a mid, vivid blue. Relative luminance 0.194; OKLCH L 59.0% C 0.168 H 275.7°. Best body text is #000000 at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#646FDF
RGB	rgb(100, 111, 223)
HSL	hsl(235, 66%, 63%)
HSV	hsv(235, 55%, 87%)
CMYK	cmyk(55.2%, 50.2%, 0%, 12.5%)
CIE-LAB	lab(51.16, 27.68, -58.67)
CIE-LCH	lch(51.16, 64.87, 295.25°)
OKLab	oklab(58.96% 0.0168 -0.1676)
OKLCH	oklch(58.96% 0.168 275.7)
XYZ	xyz(24.2550, 19.4042, 72.2650)
Luminance	0.1941 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646FDF #DFD464

analogous

#64ACDF #646FDF #9664DF

triadic

#646FDF #DF646F #6FDF64

tetradic

#646FDF #DF64AC #DFD464 #64DF96

square

#646FDF #DF64AC #DFD464 #64DF96

split-complementary

#646FDF #DF9664 #ACDF64

monochromatic

#222EA6 #3140D5 #646FDF #979EE9 #C9CDF4

Accessibility & contrast

On white

4.30

#646FDF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.88

#646FDF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #646FDF

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646FDF	#FFFFFF	#000000	##000000
##646FDF	1.00	4.30	4.88	4.88
#FFFFFF	4.30	1.00	21.00	21.00
#000000	4.88	21.00	1.00	1.00
##000000	4.88	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#357FE3

Deuteranopia (green-blind)

#2175DD

Tritanopia (blue-blind)

#22889C

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #646fdf;
/* rgb */ color: rgb(100, 111, 223);
/* oklch */ color: oklch(59.0% 0.168 275.7);

Tailwind

colors: {
  custom: {
    50: '#9998ea',
    500: '#646fdf',
    950: '#000000',
  },
}

SCSS

$custom: #646fdf;
$custom-light: #9998ea;
$custom-dark: #000000;

JSON

{
  "hex": "#646fdf",
  "rgb": {
    "r": 100,
    "g": 111,
    "b": 223
  },
  "hsl": {
    "h": 234.634,
    "s": 65.775,
    "l": 63.333
  },
  "oklch": {
    "l": 0.58964,
    "c": 0.16846,
    "h": 275.7
  },
  "luminance": 0.19406
}

Semantic roles & 50–950 ramp

primary

#646FDF

secondary

#E5E1B9

accent

#BD18CE

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0F0D16

muted

#7E7E84

Preview Lab

Preview with #646FDF

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

Preview Lab → · Contrast checker → · Palette generator →