#646FDC#646FDC

#646FDC is a mid, vivid blue. Relative luminance 0.192; OKLCH L 58.8% C 0.164 H 275.8°. Best body text is #000000 at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#646FDC
RGB	rgb(100, 111, 220)
HSL	hsl(235, 63%, 63%)
HSV	hsv(235, 55%, 86%)
CMYK	cmyk(54.5%, 49.5%, 0%, 13.7%)
CIE-LAB	lab(50.97, 26.72, -57.27)
CIE-LCH	lch(50.97, 63.20, 295.01°)
OKLab	oklab(58.77% 0.0166 -0.1635)
OKLCH	oklch(58.77% 0.164 275.8)
XYZ	xyz(23.8541, 19.2439, 70.1537)
Luminance	0.1925 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646FDC #DCD164

analogous

#64ABDC #646FDC #9564DC

triadic

#646FDC #DC646F #6FDC64

tetradic

#646FDC #DC64AB #DCD164 #64DC95

square

#646FDC #DC64AB #DCD164 #64DC95

split-complementary

#646FDC #DC9564 #ABDC64

monochromatic

#2430A1 #3241D1 #646FDC #969DE7 #C8CCF3

Accessibility & contrast

On white

4.33

#646FDC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.85

#646FDC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #646FDC

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646FDC	#FFFFFF	#000000	##000000
##646FDC	1.00	4.33	4.85	4.85
#FFFFFF	4.33	1.00	21.00	21.00
#000000	4.85	21.00	1.00	1.00
##000000	4.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#387FE0

Deuteranopia (green-blind)

#2775DA

Tritanopia (blue-blind)

#27879B

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #646fdc;
/* rgb */ color: rgb(100, 111, 220);
/* oklch */ color: oklch(58.8% 0.164 275.8);

Tailwind

colors: {
  custom: {
    50: '#9998e7',
    500: '#646fdc',
    950: '#000000',
  },
}

SCSS

$custom: #646fdc;
$custom-light: #9998e7;
$custom-dark: #000000;

JSON

{
  "hex": "#646fdc",
  "rgb": {
    "r": 100,
    "g": 111,
    "b": 220
  },
  "hsl": {
    "h": 234.5,
    "s": 63.158,
    "l": 62.745
  },
  "oklch": {
    "l": 0.58765,
    "c": 0.16435,
    "h": 275.8
  },
  "luminance": 0.19246
}

Semantic roles & 50–950 ramp

primary

#646FDC

secondary

#E4E0B8

accent

#BB1BCB

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0F0D16

muted

#7E7E84

Preview Lab

Preview with #646FDC

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

Preview Lab → · Contrast checker → · Palette generator →