#646BCD#646BCD

#646BCD is a mid, vivid blue. Relative luminance 0.176; OKLCH L 57.0% C 0.149 H 277.5°. Best body text is #FFFFFF at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#646BCD
RGB	rgb(100, 107, 205)
HSL	hsl(236, 51%, 60%)
HSV	hsv(236, 51%, 80%)
CMYK	cmyk(51.2%, 47.8%, 0%, 19.6%)
CIE-LAB	lab(49.05, 24.42, -51.83)
CIE-LCH	lch(49.05, 57.30, 295.23°)
OKLab	oklab(57.02% 0.0194 -0.1476)
OKLCH	oklch(57.02% 0.149 277.5)
XYZ	xyz(21.5292, 17.6312, 60.0145)
Luminance	0.1763 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646BCD #CDC664

analogous

#64A0CD #646BCD #9264CD

triadic

#646BCD #CD646B #6BCD64

tetradic

#646BCD #CD64A0 #CDC664 #64CD92

square

#646BCD #CD64A0 #CDC664 #64CD92

split-complementary

#646BCD #CD9264 #A0CD64

monochromatic

#2D338A #3B44B8 #646BCD #9297DC #C1C3EB

Accessibility & contrast

On white

4.64

#646BCD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.53

#646BCD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #646BCD

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646BCD	#FFFFFF	#000000	##FFFFFF
##646BCD	1.00	4.64	4.53	4.64
#FFFFFF	4.64	1.00	21.00	1.00
#000000	4.53	21.00	1.00	21.00
##FFFFFF	4.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F79D1

Deuteranopia (green-blind)

#3470CB

Tritanopia (blue-blind)

#388092

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #646bcd;
/* rgb */ color: rgb(100, 107, 205);
/* oklch */ color: oklch(57.0% 0.149 277.5);

Tailwind

colors: {
  custom: {
    50: '#9795dd',
    500: '#646bcd',
    950: '#000000',
  },
}

SCSS

$custom: #646bcd;
$custom-light: #9795dd;
$custom-dark: #000000;

JSON

{
  "hex": "#646bcd",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 205
  },
  "hsl": {
    "h": 236,
    "s": 51.22,
    "l": 59.804
  },
  "oklch": {
    "l": 0.57018,
    "c": 0.14883,
    "h": 277.5
  },
  "luminance": 0.17632
}

Semantic roles & 50–950 ramp

primary

#646BCD

secondary

#DBD8B2

accent

#D14DDB

background

#F9F9FD

surface

#F2F1FB

border

#CCCBD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #646BCD

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

Preview Lab → · Contrast checker → · Palette generator →