#555BCB#555BCB

#555BCB is a mid, vivid blue. Relative luminance 0.137; OKLCH L 52.8% C 0.171 H 276.5°. Best body text is #FFFFFF at 5.61:1 contrast (WCAG AA passes).

Color values

HEX	#555BCB
RGB	rgb(85, 91, 203)
HSL	hsl(237, 53%, 56%)
HSV	hsv(237, 58%, 80%)
CMYK	cmyk(58.1%, 55.2%, 0%, 20.4%)
CIE-LAB	lab(43.83, 30.62, -59.13)
CIE-LCH	lch(43.83, 66.58, 297.38°)
OKLab	oklab(52.79% 0.0194 -0.1695)
OKLCH	oklch(52.79% 0.171 276.5)
XYZ	xyz(18.2634, 13.7239, 58.1749)
Luminance	0.1373 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#555BCB #CBC555

analogous

#5596CB #555BCB #8A55CB

triadic

#555BCB #CB555B #5BCB55

tetradic

#555BCB #CB5596 #CBC555 #55CB8A

square

#555BCB #CB5596 #CBC555 #55CB8A

split-complementary

#555BCB #CB8A55 #96CB55

monochromatic

#272B7F #353BAE #555BCB #8488D9 #B3B5E8

Accessibility & contrast

On white

5.61

#555BCB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.75

#555BCB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #555BCB

5.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##555BCB	#FFFFFF	#000000	##FFFFFF
##555BCB	1.00	5.61	3.75	5.61
#FFFFFF	5.61	1.00	21.00	1.00
#000000	3.75	21.00	1.00	21.00
##FFFFFF	5.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#056DCF

Deuteranopia (green-blind)

#0063C9

Tritanopia (blue-blind)

#00758A

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #555bcb;
/* rgb */ color: rgb(85, 91, 203);
/* oklch */ color: oklch(52.8% 0.171 276.5);

Tailwind

colors: {
  custom: {
    50: '#8f89dc',
    500: '#555bcb',
    950: '#000000',
  },
}

SCSS

$custom: #555bcb;
$custom-light: #8f89dc;
$custom-dark: #000000;

JSON

{
  "hex": "#555bcb",
  "rgb": {
    "r": 85,
    "g": 91,
    "b": 203
  },
  "hsl": {
    "h": 236.949,
    "s": 53.153,
    "l": 56.471
  },
  "oklch": {
    "l": 0.52793,
    "c": 0.17064,
    "h": 276.5
  },
  "luminance": 0.13725
}

Semantic roles & 50–950 ramp

primary

#555BCB

secondary

#D6D4A6

accent

#D54BDD

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0D0B15

muted

#7E7C83

Preview Lab

Preview with #555BCB

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

Preview Lab → · Contrast checker → · Palette generator →