#646FCB#646FCB

#646FCB is a mid, vivid blue. Relative luminance 0.184; OKLCH L 57.7% C 0.141 H 275.9°. Best body text is #000000 at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#646FCB
RGB	rgb(100, 111, 203)
HSL	hsl(234, 50%, 59%)
HSV	hsv(234, 51%, 80%)
CMYK	cmyk(50.7%, 45.3%, 0%, 20.4%)
CIE-LAB	lab(49.96, 21.34, -49.22)
CIE-LCH	lch(49.96, 53.65, 293.44°)
OKLab	oklab(57.68% 0.0145 -0.1399)
OKLCH	oklch(57.68% 0.141 275.9)
XYZ	xyz(21.7161, 18.3887, 58.8934)
Luminance	0.1839 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646FCB #CBC064

analogous

#64A3CB #646FCB #8D64CB

triadic

#646FCB #CB646F #6FCB64

tetradic

#646FCB #CB64A3 #CBC064 #64CB8D

square

#646FCB #CB64A3 #CBC064 #64CB8D

split-complementary

#646FCB #CB8D64 #A3CB64

monochromatic

#2D3787 #3D4AB5 #646FCB #929ADA #C0C4EA

Accessibility & contrast

On white

4.49

#646FCB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.68

#646FCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #646FCB

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646FCB	#FFFFFF	#000000	##000000
##646FCB	1.00	4.49	4.68	4.68
#FFFFFF	4.49	1.00	21.00	21.00
#000000	4.68	21.00	1.00	1.00
##000000	4.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#487BCE

Deuteranopia (green-blind)

#3E73C9

Tritanopia (blue-blind)

#398393

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #646fcb;
/* rgb */ color: rgb(100, 111, 203);
/* oklch */ color: oklch(57.7% 0.141 275.9);

Tailwind

colors: {
  custom: {
    50: '#9798db',
    500: '#646fcb',
    950: '#000000',
  },
}

SCSS

$custom: #646fcb;
$custom-light: #9798db;
$custom-dark: #000000;

JSON

{
  "hex": "#646fcb",
  "rgb": {
    "r": 100,
    "g": 111,
    "b": 203
  },
  "hsl": {
    "h": 233.592,
    "s": 49.758,
    "l": 59.412
  },
  "oklch": {
    "l": 0.57677,
    "c": 0.14062,
    "h": 275.9
  },
  "luminance": 0.1839
}

Semantic roles & 50–950 ramp

primary

#646FCB

secondary

#D9D5B1

accent

#CA4FD9

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #646FCB

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

Preview Lab → · Contrast checker → · Palette generator →