#646DCF#646DCF

#646DCF is a mid, vivid blue. Relative luminance 0.182; OKLCH L 57.5% C 0.149 H 276.7°. Best body text is #000000 at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#646DCF
RGB	rgb(100, 109, 207)
HSL	hsl(235, 53%, 60%)
HSV	hsv(235, 52%, 81%)
CMYK	cmyk(51.7%, 47.3%, 0%, 18.8%)
CIE-LAB	lab(49.68, 23.82, -51.96)
CIE-LCH	lch(49.68, 57.16, 294.63°)
OKLab	oklab(57.54% 0.0174 -0.1479)
OKLCH	oklch(57.54% 0.149 276.7)
XYZ	xyz(21.9831, 18.1502, 61.3644)
Luminance	0.1815 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646DCF #CFC664

analogous

#64A3CF #646DCF #9064CF

triadic

#646DCF #CF646D #6DCF64

tetradic

#646DCF #CF64A3 #CFC664 #64CF90

square

#646DCF #CF64A3 #CFC664 #64CF90

split-complementary

#646DCF #CF9064 #A3CF64

monochromatic

#2C348D #3A45BC #646DCF #9399DD #C1C5EC

Accessibility & contrast

On white

4.54

#646DCF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.63

#646DCF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #646DCF

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646DCF	#FFFFFF	#000000	##000000
##646DCF	1.00	4.54	4.63	4.63
#FFFFFF	4.54	1.00	21.00	21.00
#000000	4.63	21.00	1.00	1.00
##000000	4.63	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#417BD3

Deuteranopia (green-blind)

#3572CD

Tritanopia (blue-blind)

#368294

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #646dcf;
/* rgb */ color: rgb(100, 109, 207);
/* oklch */ color: oklch(57.5% 0.149 276.7);

Tailwind

colors: {
  custom: {
    50: '#9796de',
    500: '#646dcf',
    950: '#000000',
  },
}

SCSS

$custom: #646dcf;
$custom-light: #9796de;
$custom-dark: #000000;

JSON

{
  "hex": "#646dcf",
  "rgb": {
    "r": 100,
    "g": 109,
    "b": 207
  },
  "hsl": {
    "h": 234.953,
    "s": 52.709,
    "l": 60.196
  },
  "oklch": {
    "l": 0.57535,
    "c": 0.14895,
    "h": 276.7
  },
  "luminance": 0.18152
}

Semantic roles & 50–950 ramp

primary

#646DCF

secondary

#DCD8B3

accent

#B325C0

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #646DCF

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

Preview Lab → · Contrast checker → · Palette generator →