#646ECB#646ECB

#646ECB is a mid, vivid blue. Relative luminance 0.182; OKLCH L 57.5% C 0.142 H 276.3°. Best body text is #000000 at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#646ECB
RGB	rgb(100, 110, 203)
HSL	hsl(234, 50%, 59%)
HSV	hsv(234, 51%, 80%)
CMYK	cmyk(50.7%, 45.8%, 0%, 20.4%)
CIE-LAB	lab(49.70, 21.95, -49.64)
CIE-LCH	lch(49.70, 54.28, 293.86°)
OKLab	oklab(57.48% 0.0157 -0.1411)
OKLCH	oklch(57.48% 0.142 276.3)
XYZ	xyz(21.6076, 18.1717, 58.8572)
Luminance	0.1817 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646ECB #CBC164

analogous

#64A2CB #646ECB #8E64CB

triadic

#646ECB #CB646E #6ECB64

tetradic

#646ECB #CB64A2 #CBC164 #64CB8E

square

#646ECB #CB64A2 #CBC164 #64CB8E

split-complementary

#646ECB #CB8E64 #A2CB64

monochromatic

#2D3687 #3D48B5 #646ECB #9299DA #C0C4EA

Accessibility & contrast

On white

4.53

#646ECB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.63

#646ECB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #646ECB

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646ECB	#FFFFFF	#000000	##000000
##646ECB	1.00	4.53	4.63	4.63
#FFFFFF	4.53	1.00	21.00	21.00
#000000	4.63	21.00	1.00	1.00
##000000	4.63	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#467BCE

Deuteranopia (green-blind)

#3C72C9

Tritanopia (blue-blind)

#398293

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #646ecb;
/* rgb */ color: rgb(100, 110, 203);
/* oklch */ color: oklch(57.5% 0.142 276.3);

Tailwind

colors: {
  custom: {
    50: '#9797db',
    500: '#646ecb',
    950: '#000000',
  },
}

SCSS

$custom: #646ecb;
$custom-light: #9797db;
$custom-dark: #000000;

JSON

{
  "hex": "#646ecb",
  "rgb": {
    "r": 100,
    "g": 110,
    "b": 203
  },
  "hsl": {
    "h": 234.175,
    "s": 49.758,
    "l": 59.412
  },
  "oklch": {
    "l": 0.57479,
    "c": 0.14196,
    "h": 276.3
  },
  "luminance": 0.18173
}

Semantic roles & 50–950 ramp

primary

#646ECB

secondary

#D9D6B1

accent

#CC4FD9

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #646ECB

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

Preview Lab → · Contrast checker → · Palette generator →