#646BBF#646BBF

#646BBF is a mid, vivid blue. Relative luminance 0.170; OKLCH L 56.1% C 0.129 H 277.8°. Best body text is #FFFFFF at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#646BBF
RGB	rgb(100, 107, 191)
HSL	hsl(235, 42%, 57%)
HSV	hsv(235, 48%, 75%)
CMYK	cmyk(47.6%, 44%, 0%, 25.1%)
CIE-LAB	lab(48.24, 20.07, -45.08)
CIE-LCH	lch(48.24, 49.34, 294.00°)
OKLab	oklab(56.15% 0.0175 -0.1277)
OKLCH	oklch(56.15% 0.129 277.8)
XYZ	xyz(19.9143, 16.9852, 51.5093)
Luminance	0.1699 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646BBF #BFB864

analogous

#6498BF #646BBF #8B64BF

triadic

#646BBF #BF646B #6BBF64

tetradic

#646BBF #BF6498 #BFB864 #64BF8B

square

#646BBF #BF6498 #BFB864 #64BF8B

split-complementary

#646BBF #BF8B64 #98BF64

monochromatic

#313777 #434BA3 #646BBF #8F94D1 #BBBEE3

Accessibility & contrast

On white

4.78

#646BBF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.40

#646BBF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646BBF

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646BBF	#FFFFFF	#000000	##FFFFFF
##646BBF	1.00	4.78	4.40	4.78
#FFFFFF	4.78	1.00	21.00	1.00
#000000	4.40	21.00	1.00	21.00
##FFFFFF	4.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4976C2

Deuteranopia (green-blind)

#426FBD

Tritanopia (blue-blind)

#437D8C

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #646bbf;
/* rgb */ color: rgb(100, 107, 191);
/* oklch */ color: oklch(56.1% 0.129 277.8);

Tailwind

colors: {
  custom: {
    50: '#9595d3',
    500: '#646bbf',
    950: '#000000',
  },
}

SCSS

$custom: #646bbf;
$custom-light: #9595d3;
$custom-dark: #000000;

JSON

{
  "hex": "#646bbf",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 191
  },
  "hsl": {
    "h": 235.385,
    "s": 41.553,
    "l": 57.059
  },
  "oklch": {
    "l": 0.56147,
    "c": 0.12893,
    "h": 277.8
  },
  "luminance": 0.16986
}

Semantic roles & 50–950 ramp

primary

#646BBF

secondary

#D2CFAD

accent

#C856D1

background

#F9F9FD

surface

#F2F1FA

border

#CCCBD3

text

#0E0D14

muted

#7E7E83

Preview Lab

Preview with #646BBF

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

Preview Lab → · Contrast checker → · Palette generator →