#557BB9#557BB9

#557BB9 is a mid, moderate blue. Relative luminance 0.196; OKLCH L 58.2% C 0.105 H 259.8°. Best body text is #000000 at 4.92:1 contrast (WCAG AA passes).

Color values

HEX	#557BB9
RGB	rgb(85, 123, 185)
HSL	hsl(217, 42%, 53%)
HSV	hsv(217, 54%, 73%)
CMYK	cmyk(54.1%, 33.5%, 0%, 27.5%)
CIE-LAB	lab(51.38, 4.88, -36.72)
CIE-LCH	lch(51.38, 37.04, 277.58°)
OKLab	oklab(58.22% -0.0186 -0.1035)
OKLCH	oklch(58.22% 0.105 259.8)
XYZ	xyz(19.5832, 19.5985, 48.6405)
Luminance	0.1960 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557BB9 #B99355

analogous

#55ADB9 #557BB9 #6155B9

triadic

#557BB9 #B9557B #7BB955

tetradic

#557BB9 #B955AD #B99355 #55B961

square

#557BB9 #B955AD #B99355 #55B961

split-complementary

#557BB9 #B96155 #ADB955

monochromatic

#2B4269 #3D5E94 #557BB9 #809DCB #ACBEDD

Accessibility & contrast

On white

4.27

#557BB9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.92

#557BB9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557BB9

4.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557BB9	#FFFFFF	#000000	##000000
##557BB9	1.00	4.27	4.92	4.92
#FFFFFF	4.27	1.00	21.00	21.00
#000000	4.92	21.00	1.00	1.00
##000000	4.92	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6280BC

Deuteranopia (green-blind)

#5676B8

Tritanopia (blue-blind)

#1D8991

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #557bb9;
/* rgb */ color: rgb(85, 123, 185);
/* oklch */ color: oklch(58.2% 0.105 259.8);

Tailwind

colors: {
  custom: {
    50: '#8ba0ce',
    500: '#557bb9',
    950: '#000000',
  },
}

SCSS

$custom: #557bb9;
$custom-light: #8ba0ce;
$custom-dark: #000000;

JSON

{
  "hex": "#557bb9",
  "rgb": {
    "r": 85,
    "g": 123,
    "b": 185
  },
  "hsl": {
    "h": 217.2,
    "s": 41.667,
    "l": 52.941
  },
  "oklch": {
    "l": 0.58219,
    "c": 0.10518,
    "h": 259.8
  },
  "luminance": 0.196
}

Semantic roles & 50–950 ramp

primary

#557BB9

secondary

#CBBA9F

accent

#A356D1

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0C0E13

muted

#7D7E82

Preview Lab

Preview with #557BB9

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

Preview Lab → · Contrast checker → · Palette generator →