#646AD9#646AD9

#646AD9 is a mid, vivid blue. Relative luminance 0.180; OKLCH L 57.6% C 0.167 H 277.5°. Best body text is #000000 at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#646AD9
RGB	rgb(100, 106, 217)
HSL	hsl(237, 61%, 62%)
HSV	hsv(237, 54%, 85%)
CMYK	cmyk(53.9%, 51.2%, 0%, 14.9%)
CIE-LAB	lab(49.53, 28.82, -57.89)
CIE-LCH	lch(49.53, 64.67, 296.46°)
OKLab	oklab(57.62% 0.0217 -0.1654)
OKLCH	oklch(57.62% 0.167 277.5)
XYZ	xyz(22.9300, 18.0257, 67.9032)
Luminance	0.1803 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646AD9 #D9D364

analogous

#64A5D9 #646AD9 #9964D9

triadic

#646AD9 #D9646A #6AD964

tetradic

#646AD9 #D964A5 #D9D364 #64D999

square

#646AD9 #D964A5 #D9D364 #64D999

split-complementary

#646AD9 #D99964 #A5D964

monochromatic

#262C9C #333BCD #646AD9 #9599E5 #C6C8F1

Accessibility & contrast

On white

4.56

#646AD9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.61

#646AD9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #646AD9

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646AD9	#FFFFFF	#000000	##000000
##646AD9	1.00	4.56	4.61	4.61
#FFFFFF	4.56	1.00	21.00	21.00
#000000	4.61	21.00	1.00	1.00
##000000	4.61	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F7BDD

Deuteranopia (green-blind)

#1E71D7

Tritanopia (blue-blind)

#2C8397

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #646ad9;
/* rgb */ color: rgb(100, 106, 217);
/* oklch */ color: oklch(57.6% 0.167 277.5);

Tailwind

colors: {
  custom: {
    50: '#9994e5',
    500: '#646ad9',
    950: '#000000',
  },
}

SCSS

$custom: #646ad9;
$custom-light: #9994e5;
$custom-dark: #000000;

JSON

{
  "hex": "#646ad9",
  "rgb": {
    "r": 100,
    "g": 106,
    "b": 217
  },
  "hsl": {
    "h": 236.923,
    "s": 60.622,
    "l": 62.157
  },
  "oklch": {
    "l": 0.57617,
    "c": 0.1668,
    "h": 277.5
  },
  "luminance": 0.18027
}

Semantic roles & 50–950 ramp

primary

#646AD9

secondary

#E2E0B7

accent

#C01DC8

background

#F9F9FE

surface

#F2F1FC

border

#CCCBD5

text

#0F0D16

muted

#7E7E84

Preview Lab

Preview with #646AD9

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

Preview Lab → · Contrast checker → · Palette generator →