#557EBB#557EBB

#557EBB is a mid, moderate blue. Relative luminance 0.204; OKLCH L 59.0% C 0.105 H 258.1°. Best body text is #000000 at 5.09:1 contrast (WCAG AA passes).

Color values

HEX	#557EBB
RGB	rgb(85, 126, 187)
HSL	hsl(216, 43%, 53%)
HSV	hsv(216, 55%, 73%)
CMYK	cmyk(54.5%, 32.6%, 0%, 26.7%)
CIE-LAB	lab(52.33, 3.73, -36.37)
CIE-LCH	lch(52.33, 36.56, 275.85°)
OKLab	oklab(58.99% -0.0216 -0.1025)
OKLCH	oklch(58.99% 0.105 258.1)
XYZ	xyz(20.1737, 20.4393, 49.8862)
Luminance	0.2044 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557EBB #BB9255

analogous

#55B1BB #557EBB #5F55BB

triadic

#557EBB #BB557E #7EBB55

tetradic

#557EBB #BB55B1 #BB9255 #55BB5F

square

#557EBB #BB55B1 #BB9255 #55BB5F

split-complementary

#557EBB #BB5F55 #B1BB55

monochromatic

#2B456B #3C6197 #557EBB #819FCC #ACC0DE

Accessibility & contrast

On white

4.13

#557EBB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.09

#557EBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557EBB

5.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557EBB	#FFFFFF	#000000	##000000
##557EBB	1.00	4.13	5.09	5.09
#FFFFFF	4.13	1.00	21.00	21.00
#000000	5.09	21.00	1.00	1.00
##000000	5.09	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6682BE

Deuteranopia (green-blind)

#5978BA

Tritanopia (blue-blind)

#188C94

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #557ebb;
/* rgb */ color: rgb(85, 126, 187);
/* oklch */ color: oklch(59.0% 0.105 258.1);

Tailwind

colors: {
  custom: {
    50: '#8ca3cf',
    500: '#557ebb',
    950: '#000000',
  },
}

SCSS

$custom: #557ebb;
$custom-light: #8ca3cf;
$custom-dark: #000000;

JSON

{
  "hex": "#557ebb",
  "rgb": {
    "r": 85,
    "g": 126,
    "b": 187
  },
  "hsl": {
    "h": 215.882,
    "s": 42.857,
    "l": 53.333
  },
  "oklch": {
    "l": 0.58991,
    "c": 0.10474,
    "h": 258.1
  },
  "luminance": 0.20441
}

Semantic roles & 50–950 ramp

primary

#557EBB

secondary

#CCBAA0

accent

#A055D3

background

#F8FAFC

surface

#F0F3F9

border

#CBCDD2

text

#0D0F14

muted

#7D7F82

Preview Lab

Preview with #557EBB

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

Preview Lab → · Contrast checker → · Palette generator →