#557FCB#557FCB

#557FCB is a mid, vivid blue. Relative luminance 0.214; OKLCH L 60.1% C 0.126 H 261.5°. Best body text is #000000 at 5.28:1 contrast (WCAG AA passes).

Color values

HEX	#557FCB
RGB	rgb(85, 127, 203)
HSL	hsl(219, 53%, 56%)
HSV	hsv(219, 58%, 80%)
CMYK	cmyk(58.1%, 37.4%, 0%, 20.4%)
CIE-LAB	lab(53.41, 8.35, -43.81)
CIE-LCH	lch(53.41, 44.60, 280.79°)
OKLab	oklab(60.09% -0.0186 -0.1242)
OKLCH	oklch(60.09% 0.126 261.5)
XYZ	xyz(22.1114, 21.4200, 59.4576)
Luminance	0.2142 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557FCB #CBA155

analogous

#55BACB #557FCB #6655CB

triadic

#557FCB #CB557F #7FCB55

tetradic

#557FCB #CB55BA #CBA155 #55CB66

square

#557FCB #CB55BA #CBA155 #55CB66

split-complementary

#557FCB #CB6655 #BACB55

monochromatic

#27467F #3560AE #557FCB #84A2D9 #B3C6E8

Accessibility & contrast

On white

3.97

#557FCB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.28

#557FCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557FCB

5.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557FCB	#FFFFFF	#000000	##000000
##557FCB	1.00	3.97	5.28	5.28
#FFFFFF	3.97	1.00	21.00	21.00
#000000	5.28	21.00	1.00	1.00
##000000	5.28	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F86CE

Deuteranopia (green-blind)

#507BC9

Tritanopia (blue-blind)

#00909B

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #557fcb;
/* rgb */ color: rgb(85, 127, 203);
/* oklch */ color: oklch(60.1% 0.126 261.5);

Tailwind

colors: {
  custom: {
    50: '#8ea3db',
    500: '#557fcb',
    950: '#000000',
  },
}

SCSS

$custom: #557fcb;
$custom-light: #8ea3db;
$custom-dark: #000000;

JSON

{
  "hex": "#557fcb",
  "rgb": {
    "r": 85,
    "g": 127,
    "b": 203
  },
  "hsl": {
    "h": 218.644,
    "s": 53.153,
    "l": 56.471
  },
  "oklch": {
    "l": 0.60088,
    "c": 0.12555,
    "h": 261.5
  },
  "luminance": 0.21422
}

Semantic roles & 50–950 ramp

primary

#557FCB

secondary

#D6C5A6

accent

#A94BDD

background

#F9FAFD

surface

#F1F3FB

border

#CBCDD4

text

#0D0F15

muted

#7E7F83

Preview Lab

Preview with #557FCB

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

Preview Lab → · Contrast checker → · Palette generator →