#555BB0#555BB0

#555BB0 is a mid, vivid blue. Relative luminance 0.125; OKLCH L 50.9% C 0.133 H 277.5°. Best body text is #FFFFFF at 5.98:1 contrast (WCAG AA passes).

Color values

HEX	#555BB0
RGB	rgb(85, 91, 176)
HSL	hsl(236, 37%, 51%)
HSV	hsv(236, 52%, 69%)
CMYK	cmyk(51.7%, 48.3%, 0%, 31%)
CIE-LAB	lab(42.07, 21.80, -46.24)
CIE-LCH	lch(42.07, 51.13, 295.24°)
OKLab	oklab(50.91% 0.0174 -0.1316)
OKLCH	oklch(50.91% 0.133 277.5)
XYZ	xyz(15.3214, 12.5471, 42.6804)
Luminance	0.1255 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#555BB0 #B0AA55

analogous

#5588B0 #555BB0 #7C55B0

triadic

#555BB0 #B0555B #5BB055

tetradic

#555BB0 #B05588 #B0AA55 #55B07C

square

#555BB0 #B05588 #B0AA55 #55B07C

split-complementary

#555BB0 #B07C55 #88B055

monochromatic

#2C2F5F #3F4488 #555BB0 #7F83C3 #A9ACD7

Accessibility & contrast

On white

5.98

#555BB0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.51

#555BB0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #555BB0

5.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##555BB0	#FFFFFF	#000000	##FFFFFF
##555BB0	1.00	5.98	3.51	5.98
#FFFFFF	5.98	1.00	21.00	1.00
#000000	3.51	21.00	1.00	21.00
##FFFFFF	5.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3567B3

Deuteranopia (green-blind)

#2B60AE

Tritanopia (blue-blind)

#2F6D7D

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #555bb0;
/* rgb */ color: rgb(85, 91, 176);
/* oklch */ color: oklch(50.9% 0.133 277.5);

Tailwind

colors: {
  custom: {
    50: '#8b89c8',
    500: '#555bb0',
    950: '#000000',
  },
}

SCSS

$custom: #555bb0;
$custom-light: #8b89c8;
$custom-dark: #000000;

JSON

{
  "hex": "#555bb0",
  "rgb": {
    "r": 85,
    "g": 91,
    "b": 176
  },
  "hsl": {
    "h": 236.044,
    "s": 36.546,
    "l": 51.176
  },
  "oklch": {
    "l": 0.50906,
    "c": 0.1328,
    "h": 277.5
  },
  "luminance": 0.12548
}

Semantic roles & 50–950 ramp

primary

#555BB0

secondary

#C5C29C

accent

#C55BCD

background

#F8F8FC

surface

#F0F0F8

border

#CBCBD1

text

#0C0B13

muted

#7D7C82

Preview Lab

Preview with #555BB0

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

Preview Lab → · Contrast checker → · Palette generator →