#557BBB#557BBB

#557BBB is a mid, moderate blue. Relative luminance 0.197; OKLCH L 58.3% C 0.108 H 260.4°. Best body text is #000000 at 4.94:1 contrast (WCAG AA passes).

Color values

HEX	#557BBB
RGB	rgb(85, 123, 187)
HSL	hsl(218, 43%, 53%)
HSV	hsv(218, 55%, 73%)
CMYK	cmyk(54.5%, 34.2%, 0%, 26.7%)
CIE-LAB	lab(51.48, 5.53, -37.71)
CIE-LCH	lch(51.48, 38.12, 278.34°)
OKLab	oklab(58.33% -0.0181 -0.1064)
OKLCH	oklch(58.33% 0.108 260.4)
XYZ	xyz(19.7958, 19.6835, 49.7602)
Luminance	0.1968 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557BBB #BB9555

analogous

#55AEBB #557BBB #6255BB

triadic

#557BBB #BB557B #7BBB55

tetradic

#557BBB #BB55AE #BB9555 #55BB62

square

#557BBB #BB55AE #BB9555 #55BB62

split-complementary

#557BBB #BB6255 #AEBB55

monochromatic

#2B436B #3C5E97 #557BBB #819DCC #ACBFDE

Accessibility & contrast

On white

4.25

#557BBB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.94

#557BBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557BBB

4.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557BBB	#FFFFFF	#000000	##000000
##557BBB	1.00	4.25	4.94	4.94
#FFFFFF	4.25	1.00	21.00	21.00
#000000	4.94	21.00	1.00	1.00
##000000	4.94	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6180BE

Deuteranopia (green-blind)

#5576BA

Tritanopia (blue-blind)

#198992

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #557bbb;
/* rgb */ color: rgb(85, 123, 187);
/* oklch */ color: oklch(58.3% 0.108 260.4);

Tailwind

colors: {
  custom: {
    50: '#8ca0d0',
    500: '#557bbb',
    950: '#000000',
  },
}

SCSS

$custom: #557bbb;
$custom-light: #8ca0d0;
$custom-dark: #000000;

JSON

{
  "hex": "#557bbb",
  "rgb": {
    "r": 85,
    "g": 123,
    "b": 187
  },
  "hsl": {
    "h": 217.647,
    "s": 42.857,
    "l": 53.333
  },
  "oklch": {
    "l": 0.58327,
    "c": 0.10794,
    "h": 260.4
  },
  "luminance": 0.19685
}

Semantic roles & 50–950 ramp

primary

#557BBB

secondary

#CCBBA0

accent

#A455D3

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0D0E14

muted

#7D7E82

Preview Lab

Preview with #557BBB

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

Preview Lab → · Contrast checker → · Palette generator →