#555FCB#555FCB

#555FCB is a mid, vivid blue. Relative luminance 0.144; OKLCH L 53.5% C 0.165 H 275.3°. Best body text is #FFFFFF at 5.40:1 contrast (WCAG AA passes).

Color values

HEX	#555FCB
RGB	rgb(85, 95, 203)
HSL	hsl(235, 53%, 56%)
HSV	hsv(235, 58%, 80%)
CMYK	cmyk(58.1%, 53.2%, 0%, 20.4%)
CIE-LAB	lab(44.84, 28.13, -57.50)
CIE-LCH	lch(44.84, 64.02, 296.07°)
OKLab	oklab(53.54% 0.0154 -0.1647)
OKLCH	oklch(53.54% 0.165 275.3)
XYZ	xyz(18.6145, 14.4261, 58.2919)
Luminance	0.1443 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#555FCB #CBC155

analogous

#559ACB #555FCB #8655CB

triadic

#555FCB #CB555F #5FCB55

tetradic

#555FCB #CB559A #CBC155 #55CB86

square

#555FCB #CB559A #CBC155 #55CB86

split-complementary

#555FCB #CB8655 #9ACB55

monochromatic

#272E7F #353FAE #555FCB #848BD9 #B3B7E8

Accessibility & contrast

On white

5.40

#555FCB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.89

#555FCB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #555FCB

5.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##555FCB	#FFFFFF	#000000	##FFFFFF
##555FCB	1.00	5.40	3.89	5.40
#FFFFFF	5.40	1.00	21.00	1.00
#000000	3.89	21.00	1.00	21.00
##FFFFFF	5.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C6FCF

Deuteranopia (green-blind)

#0065C9

Tritanopia (blue-blind)

#00788C

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #555fcb;
/* rgb */ color: rgb(85, 95, 203);
/* oklch */ color: oklch(53.5% 0.165 275.3);

Tailwind

colors: {
  custom: {
    50: '#8f8cdb',
    500: '#555fcb',
    950: '#000000',
  },
}

SCSS

$custom: #555fcb;
$custom-light: #8f8cdb;
$custom-dark: #000000;

JSON

{
  "hex": "#555fcb",
  "rgb": {
    "r": 85,
    "g": 95,
    "b": 203
  },
  "hsl": {
    "h": 234.915,
    "s": 53.153,
    "l": 56.471
  },
  "oklch": {
    "l": 0.53544,
    "c": 0.16544,
    "h": 275.3
  },
  "luminance": 0.14428
}

Semantic roles & 50–950 ramp

primary

#555FCB

secondary

#D6D2A6

accent

#D04BDD

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0D0C15

muted

#7E7D83

Preview Lab

Preview with #555FCB

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

Preview Lab → · Contrast checker → · Palette generator →