#646BCC#646BCC

#646BCC is a mid, vivid blue. Relative luminance 0.176; OKLCH L 57.0% C 0.147 H 277.5°. Best body text is #FFFFFF at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#646BCC
RGB	rgb(100, 107, 204)
HSL	hsl(236, 50%, 60%)
HSV	hsv(236, 51%, 80%)
CMYK	cmyk(51%, 47.5%, 0%, 20%)
CIE-LAB	lab(48.99, 24.11, -51.36)
CIE-LCH	lch(48.99, 56.73, 295.14°)
OKLab	oklab(56.95% 0.0193 -0.1462)
OKLCH	oklch(56.95% 0.147 277.5)
XYZ	xyz(21.4089, 17.5831, 59.3808)
Luminance	0.1758 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646BCC #CCC564

analogous

#649FCC #646BCC #9164CC

triadic

#646BCC #CC646B #6BCC64

tetradic

#646BCC #CC649F #CCC564 #64CC91

square

#646BCC #CC649F #CCC564 #64CC91

split-complementary

#646BCC #CC9164 #9FCC64

monochromatic

#2D3389 #3C44B7 #646BCC #9297DB #C0C3EA

Accessibility & contrast

On white

4.65

#646BCC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.52

#646BCC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #646BCC

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646BCC	#FFFFFF	#000000	##FFFFFF
##646BCC	1.00	4.65	4.52	4.65
#FFFFFF	4.65	1.00	21.00	1.00
#000000	4.52	21.00	1.00	21.00
##FFFFFF	4.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F79D0

Deuteranopia (green-blind)

#3570CA

Tritanopia (blue-blind)

#398092

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #646bcc;
/* rgb */ color: rgb(100, 107, 204);
/* oklch */ color: oklch(57.0% 0.147 277.5);

Tailwind

colors: {
  custom: {
    50: '#9795dc',
    500: '#646bcc',
    950: '#000000',
  },
}

SCSS

$custom: #646bcc;
$custom-light: #9795dc;
$custom-dark: #000000;

JSON

{
  "hex": "#646bcc",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 204
  },
  "hsl": {
    "h": 235.962,
    "s": 50.485,
    "l": 59.608
  },
  "oklch": {
    "l": 0.56954,
    "c": 0.14743,
    "h": 277.5
  },
  "luminance": 0.17584
}

Semantic roles & 50–950 ramp

primary

#646BCC

secondary

#DAD7B2

accent

#D14EDA

background

#F9F9FD

surface

#F2F1FB

border

#CCCBD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #646BCC

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

Preview Lab → · Contrast checker → · Palette generator →