#646FCF#646FCF

#646FCF is a mid, vivid blue. Relative luminance 0.186; OKLCH L 57.9% C 0.146 H 275.9°. Best body text is #000000 at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#646FCF
RGB	rgb(100, 111, 207)
HSL	hsl(234, 53%, 60%)
HSV	hsv(234, 52%, 81%)
CMYK	cmyk(51.7%, 46.4%, 0%, 18.8%)
CIE-LAB	lab(50.19, 22.60, -51.14)
CIE-LCH	lch(50.19, 55.91, 293.84°)
OKLab	oklab(57.93% 0.0151 -0.1455)
OKLCH	oklch(57.93% 0.146 275.9)
XYZ	xyz(22.1989, 18.5818, 61.4363)
Luminance	0.1858 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646FCF #CFC464

analogous

#64A4CF #646FCF #8F64CF

triadic

#646FCF #CF646F #6FCF64

tetradic

#646FCF #CF64A4 #CFC464 #64CF8F

square

#646FCF #CF64A4 #CFC464 #64CF8F

split-complementary

#646FCF #CF8F64 #A4CF64

monochromatic

#2C368D #3A47BC #646FCF #939ADD #C1C6EC

Accessibility & contrast

On white

4.45

#646FCF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.72

#646FCF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #646FCF

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646FCF	#FFFFFF	#000000	##000000
##646FCF	1.00	4.45	4.72	4.72
#FFFFFF	4.45	1.00	21.00	21.00
#000000	4.72	21.00	1.00	1.00
##000000	4.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#457CD3

Deuteranopia (green-blind)

#3973CD

Tritanopia (blue-blind)

#368495

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #646fcf;
/* rgb */ color: rgb(100, 111, 207);
/* oklch */ color: oklch(57.9% 0.146 275.9);

Tailwind

colors: {
  custom: {
    50: '#9798de',
    500: '#646fcf',
    950: '#000000',
  },
}

SCSS

$custom: #646fcf;
$custom-light: #9798de;
$custom-dark: #000000;

JSON

{
  "hex": "#646fcf",
  "rgb": {
    "r": 100,
    "g": 111,
    "b": 207
  },
  "hsl": {
    "h": 233.832,
    "s": 52.709,
    "l": 60.196
  },
  "oklch": {
    "l": 0.57926,
    "c": 0.14627,
    "h": 275.9
  },
  "luminance": 0.18583
}

Semantic roles & 50–950 ramp

primary

#646FCF

secondary

#DCD8B3

accent

#B025C0

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #646FCF

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

Preview Lab → · Contrast checker → · Palette generator →