#646ACC#646ACC

#646ACC is a mid, vivid blue. Relative luminance 0.174; OKLCH L 56.8% C 0.149 H 277.9°. Best body text is #FFFFFF at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#646ACC
RGB	rgb(100, 106, 204)
HSL	hsl(237, 50%, 60%)
HSV	hsv(237, 51%, 80%)
CMYK	cmyk(51%, 48%, 0%, 20%)
CIE-LAB	lab(48.73, 24.72, -51.77)
CIE-LCH	lch(48.73, 57.37, 295.53°)
OKLab	oklab(56.76% 0.0204 -0.1474)
OKLCH	oklch(56.76% 0.149 277.9)
XYZ	xyz(21.3052, 17.3758, 59.3462)
Luminance	0.1738 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646ACC #CCC664

analogous

#649ECC #646ACC #9264CC

triadic

#646ACC #CC646A #6ACC64

tetradic

#646ACC #CC649E #CCC664 #64CC92

square

#646ACC #CC649E #CCC664 #64CC92

split-complementary

#646ACC #CC9264 #9ECC64

monochromatic

#2D3289 #3C43B7 #646ACC #9296DB #C0C3EA

Accessibility & contrast

On white

4.69

#646ACC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.48

#646ACC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646ACC

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646ACC	#FFFFFF	#000000	##FFFFFF
##646ACC	1.00	4.69	4.48	4.69
#FFFFFF	4.69	1.00	21.00	1.00
#000000	4.48	21.00	1.00	21.00
##FFFFFF	4.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D78D0

Deuteranopia (green-blind)

#3370CA

Tritanopia (blue-blind)

#397F91

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #646acc;
/* rgb */ color: rgb(100, 106, 204);
/* oklch */ color: oklch(56.8% 0.149 277.9);

Tailwind

colors: {
  custom: {
    50: '#9794dc',
    500: '#646acc',
    950: '#000000',
  },
}

SCSS

$custom: #646acc;
$custom-light: #9794dc;
$custom-dark: #000000;

JSON

{
  "hex": "#646acc",
  "rgb": {
    "r": 100,
    "g": 106,
    "b": 204
  },
  "hsl": {
    "h": 236.538,
    "s": 50.485,
    "l": 59.608
  },
  "oklch": {
    "l": 0.5676,
    "c": 0.14878,
    "h": 277.9
  },
  "luminance": 0.17377
}

Semantic roles & 50–950 ramp

primary

#646ACC

secondary

#DAD8B2

accent

#D24EDA

background

#F9F9FD

surface

#F2F1FB

border

#CCCBD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #646ACC

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

Preview Lab → · Contrast checker → · Palette generator →