#557CB9#557CB9

#557CB9 is a mid, moderate blue. Relative luminance 0.198; OKLCH L 58.4% C 0.104 H 259.1°. Best body text is #000000 at 4.97:1 contrast (WCAG AA passes).

Color values

HEX	#557CB9
RGB	rgb(85, 124, 185)
HSL	hsl(217, 42%, 53%)
HSV	hsv(217, 54%, 73%)
CMYK	cmyk(54.1%, 33%, 0%, 27.5%)
CIE-LAB	lab(51.66, 4.28, -36.27)
CIE-LCH	lch(51.66, 36.52, 276.73°)
OKLab	oklab(58.44% -0.0198 -0.1022)
OKLCH	oklch(58.44% 0.104 259.1)
XYZ	xyz(19.7079, 19.8479, 48.6820)
Luminance	0.1985 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557CB9 #B99255

analogous

#55AEB9 #557CB9 #6055B9

triadic

#557CB9 #B9557C #7CB955

tetradic

#557CB9 #B955AE #B99255 #55B960

square

#557CB9 #B955AE #B99255 #55B960

split-complementary

#557CB9 #B96055 #AEB955

monochromatic

#2B4369 #3D5F94 #557CB9 #809DCB #ACBFDD

Accessibility & contrast

On white

4.23

#557CB9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.97

#557CB9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557CB9

4.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557CB9	#FFFFFF	#000000	##000000
##557CB9	1.00	4.23	4.97	4.97
#FFFFFF	4.23	1.00	21.00	21.00
#000000	4.97	21.00	1.00	1.00
##000000	4.97	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6480BC

Deuteranopia (green-blind)

#5777B8

Tritanopia (blue-blind)

#1C8992

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #557cb9;
/* rgb */ color: rgb(85, 124, 185);
/* oklch */ color: oklch(58.4% 0.104 259.1);

Tailwind

colors: {
  custom: {
    50: '#8ba1ce',
    500: '#557cb9',
    950: '#000000',
  },
}

SCSS

$custom: #557cb9;
$custom-light: #8ba1ce;
$custom-dark: #000000;

JSON

{
  "hex": "#557cb9",
  "rgb": {
    "r": 85,
    "g": 124,
    "b": 185
  },
  "hsl": {
    "h": 216.6,
    "s": 41.667,
    "l": 52.941
  },
  "oklch": {
    "l": 0.58441,
    "c": 0.10411,
    "h": 259.1
  },
  "luminance": 0.19849
}

Semantic roles & 50–950 ramp

primary

#557CB9

secondary

#CBBA9F

accent

#A156D1

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0C0E13

muted

#7D7E82

Preview Lab

Preview with #557CB9

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

Preview Lab → · Contrast checker → · Palette generator →