#555BB1#555BB1

#555BB1 is a mid, vivid blue. Relative luminance 0.126; OKLCH L 51.0% C 0.134 H 277.5°. Best body text is #FFFFFF at 5.97:1 contrast (WCAG AA passes).

Color values

HEX	#555BB1
RGB	rgb(85, 91, 177)
HSL	hsl(236, 37%, 51%)
HSV	hsv(236, 52%, 69%)
CMYK	cmyk(52%, 48.6%, 0%, 30.6%)
CIE-LAB	lab(42.13, 22.13, -46.73)
CIE-LCH	lch(42.13, 51.71, 295.33°)
OKLab	oklab(50.97% 0.0175 -0.1331)
OKLCH	oklch(50.97% 0.134 277.5)
XYZ	xyz(15.4207, 12.5869, 43.2034)
Luminance	0.1259 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#555BB1 #B1AB55

analogous

#5589B1 #555BB1 #7D55B1

triadic

#555BB1 #B1555B #5BB155

tetradic

#555BB1 #B15589 #B1AB55 #55B17D

square

#555BB1 #B15589 #B1AB55 #55B17D

split-complementary

#555BB1 #B17D55 #89B155

monochromatic

#2C2F60 #3F448A #555BB1 #7F83C4 #A9ACD7

Accessibility & contrast

On white

5.97

#555BB1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.52

#555BB1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #555BB1

5.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##555BB1	#FFFFFF	#000000	##FFFFFF
##555BB1	1.00	5.97	3.52	5.97
#FFFFFF	5.97	1.00	21.00	1.00
#000000	3.52	21.00	1.00	21.00
##FFFFFF	5.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3467B4

Deuteranopia (green-blind)

#2A60AF

Tritanopia (blue-blind)

#2E6E7D

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #555bb1;
/* rgb */ color: rgb(85, 91, 177);
/* oklch */ color: oklch(51.0% 0.134 277.5);

Tailwind

colors: {
  custom: {
    50: '#8b89c9',
    500: '#555bb1',
    950: '#000000',
  },
}

SCSS

$custom: #555bb1;
$custom-light: #8b89c9;
$custom-dark: #000000;

JSON

{
  "hex": "#555bb1",
  "rgb": {
    "r": 85,
    "g": 91,
    "b": 177
  },
  "hsl": {
    "h": 236.087,
    "s": 37.097,
    "l": 51.373
  },
  "oklch": {
    "l": 0.50972,
    "c": 0.13424,
    "h": 277.5
  },
  "luminance": 0.12588
}

Semantic roles & 50–950 ramp

primary

#555BB1

secondary

#C5C39D

accent

#C65BCD

background

#F8F8FC

surface

#F0F0F8

border

#CBCBD1

text

#0C0B13

muted

#7D7C82

Preview Lab

Preview with #555BB1

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

Preview Lab → · Contrast checker → · Palette generator →