#557BCB#557BCB

#557BCB is a mid, vivid blue. Relative luminance 0.204; OKLCH L 59.2% C 0.130 H 263.7°. Best body text is #000000 at 5.08:1 contrast (WCAG AA passes).

Color values

HEX	#557BCB
RGB	rgb(85, 123, 203)
HSL	hsl(221, 53%, 56%)
HSV	hsv(221, 58%, 80%)
CMYK	cmyk(58.1%, 39.4%, 0%, 20.4%)
CIE-LAB	lab(52.29, 10.77, -45.57)
CIE-LCH	lch(52.29, 46.83, 283.30°)
OKLab	oklab(59.23% -0.0143 -0.1294)
OKLCH	oklch(59.23% 0.13 263.7)
XYZ	xyz(21.6051, 20.4072, 59.2888)
Luminance	0.2041 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557BCB #CBA555

analogous

#55B6CB #557BCB #6A55CB

triadic

#557BCB #CB557B #7BCB55

tetradic

#557BCB #CB55B6 #CBA555 #55CB6A

square

#557BCB #CB55B6 #CBA555 #55CB6A

split-complementary

#557BCB #CB6A55 #B6CB55

monochromatic

#27437F #355CAE #557BCB #849FD9 #B3C4E8

Accessibility & contrast

On white

4.13

#557BCB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.08

#557BCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557BCB

5.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557BCB	#FFFFFF	#000000	##000000
##557BCB	1.00	4.13	5.08	5.08
#FFFFFF	4.13	1.00	21.00	21.00
#000000	5.08	21.00	1.00	1.00
##000000	5.08	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5983CE

Deuteranopia (green-blind)

#4A78C9

Tritanopia (blue-blind)

#008D99

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #557bcb;
/* rgb */ color: rgb(85, 123, 203);
/* oklch */ color: oklch(59.2% 0.130 263.7);

Tailwind

colors: {
  custom: {
    50: '#8ea0db',
    500: '#557bcb',
    950: '#000000',
  },
}

SCSS

$custom: #557bcb;
$custom-light: #8ea0db;
$custom-dark: #000000;

JSON

{
  "hex": "#557bcb",
  "rgb": {
    "r": 85,
    "g": 123,
    "b": 203
  },
  "hsl": {
    "h": 220.678,
    "s": 53.153,
    "l": 56.471
  },
  "oklch": {
    "l": 0.59228,
    "c": 0.13014,
    "h": 263.7
  },
  "luminance": 0.20409
}

Semantic roles & 50–950 ramp

primary

#557BCB

secondary

#D6C7A6

accent

#AE4BDD

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #557BCB

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

Preview Lab → · Contrast checker → · Palette generator →