#555CB1#555CB1

#555CB1 is a mid, vivid blue. Relative luminance 0.128; OKLCH L 51.2% C 0.133 H 277.1°. Best body text is #FFFFFF at 5.91:1 contrast (WCAG AA passes).

Color values

HEX	#555CB1
RGB	rgb(85, 92, 177)
HSL	hsl(235, 37%, 51%)
HSV	hsv(235, 52%, 69%)
CMYK	cmyk(52%, 48%, 0%, 30.6%)
CIE-LAB	lab(42.40, 21.50, -46.31)
CIE-LCH	lch(42.40, 51.06, 294.90°)
OKLab	oklab(51.17% 0.0164 -0.1318)
OKLCH	oklch(51.17% 0.133 277.1)
XYZ	xyz(15.5068, 12.7590, 43.2321)
Luminance	0.1276 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#555CB1 #B1AA55

analogous

#558AB1 #555CB1 #7C55B1

triadic

#555CB1 #B1555C #5CB155

tetradic

#555CB1 #B1558A #B1AA55 #55B17C

square

#555CB1 #B1558A #B1AA55 #55B17C

split-complementary

#555CB1 #B17C55 #8AB155

monochromatic

#2C3060 #3F458A #555CB1 #7F84C4 #A9ACD7

Accessibility & contrast

On white

5.91

#555CB1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.55

#555CB1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #555CB1

5.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##555CB1	#FFFFFF	#000000	##FFFFFF
##555CB1	1.00	5.91	3.55	5.91
#FFFFFF	5.91	1.00	21.00	1.00
#000000	3.55	21.00	1.00	21.00
##FFFFFF	5.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3668B4

Deuteranopia (green-blind)

#2C61AF

Tritanopia (blue-blind)

#2E6E7E

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #555cb1;
/* rgb */ color: rgb(85, 92, 177);
/* oklch */ color: oklch(51.2% 0.133 277.1);

Tailwind

colors: {
  custom: {
    50: '#8b8ac9',
    500: '#555cb1',
    950: '#000000',
  },
}

SCSS

$custom: #555cb1;
$custom-light: #8b8ac9;
$custom-dark: #000000;

JSON

{
  "hex": "#555cb1",
  "rgb": {
    "r": 85,
    "g": 92,
    "b": 177
  },
  "hsl": {
    "h": 235.435,
    "s": 37.097,
    "l": 51.373
  },
  "oklch": {
    "l": 0.51171,
    "c": 0.13285,
    "h": 277.1
  },
  "luminance": 0.1276
}

Semantic roles & 50–950 ramp

primary

#555CB1

secondary

#C5C29D

accent

#C45BCD

background

#F8F8FC

surface

#F0F0F8

border

#CBCBD1

text

#0C0B13

muted

#7D7C82

Preview Lab

Preview with #555CB1

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

Preview Lab → · Contrast checker → · Palette generator →