#557CCB#557CCB

#557CCB is a mid, vivid blue. Relative luminance 0.207; OKLCH L 59.4% C 0.129 H 263.2°. Best body text is #000000 at 5.13:1 contrast (WCAG AA passes).

Color values

HEX	#557CCB
RGB	rgb(85, 124, 203)
HSL	hsl(220, 53%, 56%)
HSV	hsv(220, 58%, 80%)
CMYK	cmyk(58.1%, 38.9%, 0%, 20.4%)
CIE-LAB	lab(52.57, 10.17, -45.13)
CIE-LCH	lch(52.57, 46.26, 282.69°)
OKLab	oklab(59.44% -0.0154 -0.1281)
OKLCH	oklch(59.44% 0.129 263.2)
XYZ	xyz(21.7298, 20.6566, 59.3304)
Luminance	0.2066 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557CCB #CBA455

analogous

#55B7CB #557CCB #6955CB

triadic

#557CCB #CB557C #7CCB55

tetradic

#557CCB #CB55B7 #CBA455 #55CB69

square

#557CCB #CB55B7 #CBA455 #55CB69

split-complementary

#557CCB #CB6955 #B7CB55

monochromatic

#27447F #355DAE #557CCB #84A0D9 #B3C4E8

Accessibility & contrast

On white

4.09

#557CCB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.13

#557CCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557CCB

5.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557CCB	#FFFFFF	#000000	##000000
##557CCB	1.00	4.09	5.13	5.13
#FFFFFF	4.09	1.00	21.00	21.00
#000000	5.13	21.00	1.00	1.00
##000000	5.13	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B83CE

Deuteranopia (green-blind)

#4B78C9

Tritanopia (blue-blind)

#008E9A

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #557ccb;
/* rgb */ color: rgb(85, 124, 203);
/* oklch */ color: oklch(59.4% 0.129 263.2);

Tailwind

colors: {
  custom: {
    50: '#8ea1db',
    500: '#557ccb',
    950: '#000000',
  },
}

SCSS

$custom: #557ccb;
$custom-light: #8ea1db;
$custom-dark: #000000;

JSON

{
  "hex": "#557ccb",
  "rgb": {
    "r": 85,
    "g": 124,
    "b": 203
  },
  "hsl": {
    "h": 220.169,
    "s": 53.153,
    "l": 56.471
  },
  "oklch": {
    "l": 0.59442,
    "c": 0.12898,
    "h": 263.2
  },
  "luminance": 0.20658
}

Semantic roles & 50–950 ramp

primary

#557CCB

secondary

#D6C6A6

accent

#AD4BDD

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #557CCB

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

Preview Lab → · Contrast checker → · Palette generator →