#557FBC#557FBC

#557FBC is a mid, moderate blue. Relative luminance 0.207; OKLCH L 59.3% C 0.105 H 257.7°. Best body text is #000000 at 5.15:1 contrast (WCAG AA passes).

Color values

HEX	#557FBC
RGB	rgb(85, 127, 188)
HSL	hsl(216, 43%, 54%)
HSV	hsv(216, 55%, 74%)
CMYK	cmyk(54.8%, 32.4%, 0%, 26.3%)
CIE-LAB	lab(52.66, 3.45, -36.42)
CIE-LCH	lch(52.66, 36.59, 275.41°)
OKLab	oklab(59.27% -0.0224 -0.1026)
OKLCH	oklch(59.27% 0.105 257.7)
XYZ	xyz(20.4096, 20.7393, 50.4948)
Luminance	0.2074 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557FBC #BC9255

analogous

#55B2BC #557FBC #5E55BC

triadic

#557FBC #BC557F #7FBC55

tetradic

#557FBC #BC55B2 #BC9255 #55BC5E

square

#557FBC #BC55B2 #BC9255 #55BC5E

split-complementary

#557FBC #BC5E55 #B2BC55

monochromatic

#2B456C #3C6198 #557FBC #81A0CD #ADC1DF

Accessibility & contrast

On white

4.08

#557FBC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.15

#557FBC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557FBC

5.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557FBC	#FFFFFF	#000000	##000000
##557FBC	1.00	4.08	5.15	5.15
#FFFFFF	4.08	1.00	21.00	21.00
#000000	5.15	21.00	1.00	1.00
##000000	5.15	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6683BF

Deuteranopia (green-blind)

#5A79BB

Tritanopia (blue-blind)

#168D95

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #557fbc;
/* rgb */ color: rgb(85, 127, 188);
/* oklch */ color: oklch(59.3% 0.105 257.7);

Tailwind

colors: {
  custom: {
    50: '#8ca3d0',
    500: '#557fbc',
    950: '#000000',
  },
}

SCSS

$custom: #557fbc;
$custom-light: #8ca3d0;
$custom-dark: #000000;

JSON

{
  "hex": "#557fbc",
  "rgb": {
    "r": 85,
    "g": 127,
    "b": 188
  },
  "hsl": {
    "h": 215.534,
    "s": 43.46,
    "l": 53.529
  },
  "oklch": {
    "l": 0.59267,
    "c": 0.10507,
    "h": 257.7
  },
  "luminance": 0.20741
}

Semantic roles & 50–950 ramp

primary

#557FBC

secondary

#CCBAA0

accent

#A055D3

background

#F8FAFC

surface

#F0F3F9

border

#CBCDD2

text

#0D0F14

muted

#7D7F82

Preview Lab

Preview with #557FBC

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

Preview Lab → · Contrast checker → · Palette generator →