#557BD0#557BD0

#557BD0 is a mid, vivid blue. Relative luminance 0.207; OKLCH L 59.5% C 0.137 H 264.5°. Best body text is #000000 at 5.13:1 contrast (WCAG AA passes).

Color values

HEX	#557BD0
RGB	rgb(85, 123, 208)
HSL	hsl(221, 57%, 57%)
HSV	hsv(221, 59%, 82%)
CMYK	cmyk(59.1%, 40.9%, 0%, 18.4%)
CIE-LAB	lab(52.56, 12.44, -47.98)
CIE-LCH	lch(52.56, 49.57, 284.53°)
OKLab	oklab(59.52% -0.0132 -0.1364)
OKLCH	oklch(59.52% 0.137 264.5)
XYZ	xyz(22.2105, 20.6494, 62.4776)
Luminance	0.2065 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557BD0 #D0AA55

analogous

#55B9D0 #557BD0 #6C55D0

triadic

#557BD0 #D0557B #7BD055

tetradic

#557BD0 #D055B9 #D0AA55 #55D06C

square

#557BD0 #D055B9 #D0AA55 #55D06C

split-complementary

#557BD0 #D06C55 #B9D055

monochromatic

#254386 #325BB6 #557BD0 #85A0DD #B5C5EB

Accessibility & contrast

On white

4.09

#557BD0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.13

#557BD0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557BD0

5.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557BD0	#FFFFFF	#000000	##000000
##557BD0	1.00	4.09	5.13	5.13
#FFFFFF	4.09	1.00	21.00	21.00
#000000	5.13	21.00	1.00	1.00
##000000	5.13	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5683D3

Deuteranopia (green-blind)

#4578CE

Tritanopia (blue-blind)

#008E9B

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #557bd0;
/* rgb */ color: rgb(85, 123, 208);
/* oklch */ color: oklch(59.5% 0.137 264.5);

Tailwind

colors: {
  custom: {
    50: '#8fa0df',
    500: '#557bd0',
    950: '#000000',
  },
}

SCSS

$custom: #557bd0;
$custom-light: #8fa0df;
$custom-dark: #000000;

JSON

{
  "hex": "#557bd0",
  "rgb": {
    "r": 85,
    "g": 123,
    "b": 208
  },
  "hsl": {
    "h": 221.463,
    "s": 56.682,
    "l": 57.451
  },
  "oklch": {
    "l": 0.59523,
    "c": 0.13707,
    "h": 264.5
  },
  "luminance": 0.20651
}

Semantic roles & 50–950 ramp

primary

#557BD0

secondary

#D9CAA8

accent

#B148E0

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #557BD0

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

Preview Lab → · Contrast checker → · Palette generator →