#557DBB#557DBB

#557DBB is a mid, moderate blue. Relative luminance 0.202; OKLCH L 58.8% C 0.106 H 258.9°. Best body text is #000000 at 5.04:1 contrast (WCAG AA passes).

Color values

HEX	#557DBB
RGB	rgb(85, 125, 187)
HSL	hsl(216, 43%, 53%)
HSV	hsv(216, 55%, 73%)
CMYK	cmyk(54.5%, 33.2%, 0%, 26.7%)
CIE-LAB	lab(52.05, 4.33, -36.82)
CIE-LCH	lch(52.05, 37.07, 276.70°)
OKLab	oklab(58.77% -0.0204 -0.1038)
OKLCH	oklch(58.77% 0.106 258.9)
XYZ	xyz(20.0465, 20.1848, 49.8438)
Luminance	0.2019 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557DBB #BB9355

analogous

#55B0BB #557DBB #6055BB

triadic

#557DBB #BB557D #7DBB55

tetradic

#557DBB #BB55B0 #BB9355 #55BB60

square

#557DBB #BB55B0 #BB9355 #55BB60

split-complementary

#557DBB #BB6055 #B0BB55

monochromatic

#2B446B #3C6097 #557DBB #819ECC #ACC0DE

Accessibility & contrast

On white

4.17

#557DBB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.04

#557DBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557DBB

5.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557DBB	#FFFFFF	#000000	##000000
##557DBB	1.00	4.17	5.04	5.04
#FFFFFF	4.17	1.00	21.00	21.00
#000000	5.04	21.00	1.00	1.00
##000000	5.04	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6481BE

Deuteranopia (green-blind)

#5878BA

Tritanopia (blue-blind)

#198B93

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #557dbb;
/* rgb */ color: rgb(85, 125, 187);
/* oklch */ color: oklch(58.8% 0.106 258.9);

Tailwind

colors: {
  custom: {
    50: '#8ca2cf',
    500: '#557dbb',
    950: '#000000',
  },
}

SCSS

$custom: #557dbb;
$custom-light: #8ca2cf;
$custom-dark: #000000;

JSON

{
  "hex": "#557dbb",
  "rgb": {
    "r": 85,
    "g": 125,
    "b": 187
  },
  "hsl": {
    "h": 216.471,
    "s": 42.857,
    "l": 53.333
  },
  "oklch": {
    "l": 0.58769,
    "c": 0.1058,
    "h": 258.9
  },
  "luminance": 0.20186
}

Semantic roles & 50–950 ramp

primary

#557DBB

secondary

#CCBBA0

accent

#A155D3

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0D0F14

muted

#7D7E82

Preview Lab

Preview with #557DBB

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

Preview Lab → · Contrast checker → · Palette generator →