#646CDB#646CDB

#646CDB is a mid, vivid blue. Relative luminance 0.185; OKLCH L 58.1% C 0.167 H 276.8°. Best body text is #000000 at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#646CDB
RGB	rgb(100, 108, 219)
HSL	hsl(236, 62%, 63%)
HSV	hsv(236, 54%, 86%)
CMYK	cmyk(54.3%, 50.7%, 0%, 14.1%)
CIE-LAB	lab(50.15, 28.23, -58.02)
CIE-LCH	lch(50.15, 64.52, 295.95°)
OKLab	oklab(58.13% 0.0197 -0.1657)
OKLCH	oklch(58.13% 0.167 276.8)
XYZ	xyz(23.4002, 18.5474, 69.3510)
Luminance	0.1855 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646CDB #DBD364

analogous

#64A8DB #646CDB #9764DB

triadic

#646CDB #DB646C #6CDB64

tetradic

#646CDB #DB64A8 #DBD364 #64DB97

square

#646CDB #DB64A8 #DBD364 #64DB97

split-complementary

#646CDB #DB9764 #A8DB64

monochromatic

#252DA0 #323DCF #646CDB #969BE7 #C7CAF2

Accessibility & contrast

On white

4.46

#646CDB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.71

#646CDB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #646CDB

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646CDB	#FFFFFF	#000000	##000000
##646CDB	1.00	4.46	4.71	4.71
#FFFFFF	4.46	1.00	21.00	21.00
#000000	4.71	21.00	1.00	1.00
##000000	4.71	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#327CDF

Deuteranopia (green-blind)

#2073D9

Tritanopia (blue-blind)

#298599

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #646cdb;
/* rgb */ color: rgb(100, 108, 219);
/* oklch */ color: oklch(58.1% 0.167 276.8);

Tailwind

colors: {
  custom: {
    50: '#9996e7',
    500: '#646cdb',
    950: '#000000',
  },
}

SCSS

$custom: #646cdb;
$custom-light: #9996e7;
$custom-dark: #000000;

JSON

{
  "hex": "#646cdb",
  "rgb": {
    "r": 100,
    "g": 108,
    "b": 219
  },
  "hsl": {
    "h": 235.966,
    "s": 62.304,
    "l": 62.549
  },
  "oklch": {
    "l": 0.58128,
    "c": 0.1669,
    "h": 276.8
  },
  "luminance": 0.18549
}

Semantic roles & 50–950 ramp

primary

#646CDB

secondary

#E3E0B8

accent

#BE1BCA

background

#F9F9FE

surface

#F2F1FC

border

#CCCBD5

text

#0F0D16

muted

#7E7E84

Preview Lab

Preview with #646CDB

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

Preview Lab → · Contrast checker → · Palette generator →