#6557BB#6557BB

#6557BB is a mid, vivid blue. Relative luminance 0.132; OKLCH L 52.2% C 0.152 H 286.3°. Best body text is #FFFFFF at 5.78:1 contrast (WCAG AA passes).

Color values

HEX	#6557BB
RGB	rgb(101, 87, 187)
HSL	hsl(248, 42%, 54%)
HSV	hsv(248, 53%, 73%)
CMYK	cmyk(46%, 53.5%, 0%, 26.7%)
CIE-LAB	lab(43.02, 31.36, -51.10)
CIE-LCH	lch(43.02, 59.96, 301.54°)
OKLab	oklab(52.15% 0.0425 -0.1455)
OKLCH	oklch(52.15% 0.152 286.3)
XYZ	xyz(17.7421, 13.1702, 48.6113)
Luminance	0.1317 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6557BB #ADBB57

analogous

#577BBB #6557BB #9757BB

triadic

#6557BB #BB6557 #57BB65

tetradic

#6557BB #BB577B #ADBB57 #57BB97

square

#6557BB #BB577B #ADBB57 #57BB97

split-complementary

#6557BB #BB9757 #7BBB57

monochromatic

#352C6C #4A3D97 #6557BB #8D83CD #B5AEDE

Accessibility & contrast

On white

5.78

#6557BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.63

#6557BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #6557BB

5.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6557BB	#FFFFFF	#000000	##FFFFFF
##6557BB	1.00	5.78	3.63	5.78
#FFFFFF	5.78	1.00	21.00	1.00
#000000	3.63	21.00	1.00	21.00
##FFFFFF	5.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2568BE

Deuteranopia (green-blind)

#2363B9

Tritanopia (blue-blind)

#496D80

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #6557bb;
/* rgb */ color: rgb(101, 87, 187);
/* oklch */ color: oklch(52.2% 0.152 286.3);

Tailwind

colors: {
  custom: {
    50: '#9686d0',
    500: '#6557bb',
    950: '#000000',
  },
}

SCSS

$custom: #6557bb;
$custom-light: #9686d0;
$custom-dark: #000000;

JSON

{
  "hex": "#6557bb",
  "rgb": {
    "r": 101,
    "g": 87,
    "b": 187
  },
  "hsl": {
    "h": 248.4,
    "s": 42.373,
    "l": 53.725
  },
  "oklch": {
    "l": 0.52155,
    "c": 0.1516,
    "h": 286.3
  },
  "luminance": 0.13171
}

Semantic roles & 50–950 ramp

primary

#6557BB

secondary

#C6CCA2

accent

#D256C1

background

#F9F8FC

surface

#F2EFF9

border

#CCCAD2

text

#0E0B14

muted

#7E7C82

Preview Lab

Preview with #6557BB

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

Preview Lab → · Contrast checker → · Palette generator →