#555CB3#555CB3

#555CB3 is a mid, vivid blue. Relative luminance 0.128; OKLCH L 51.3% C 0.136 H 277.0°. Best body text is #FFFFFF at 5.89:1 contrast (WCAG AA passes).

Color values

HEX	#555CB3
RGB	rgb(85, 92, 179)
HSL	hsl(236, 38%, 52%)
HSV	hsv(236, 53%, 70%)
CMYK	cmyk(52.5%, 48.6%, 0%, 29.8%)
CIE-LAB	lab(42.52, 22.14, -47.29)
CIE-LCH	lch(42.52, 52.22, 295.09°)
OKLab	oklab(51.3% 0.0166 -0.1347)
OKLCH	oklch(51.3% 0.136 277)
XYZ	xyz(15.7076, 12.8393, 44.2896)
Luminance	0.1284 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#555CB3 #B3AC55

analogous

#558BB3 #555CB3 #7D55B3

triadic

#555CB3 #B3555C #5CB355

tetradic

#555CB3 #B3558B #B3AC55 #55B37D

square

#555CB3 #B3558B #B3AC55 #55B37D

split-complementary

#555CB3 #B37D55 #8BB355

monochromatic

#2C3062 #3F448C #555CB3 #7F85C6 #AAADD9

Accessibility & contrast

On white

5.89

#555CB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.57

#555CB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #555CB3

5.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##555CB3	#FFFFFF	#000000	##FFFFFF
##555CB3	1.00	5.89	3.57	5.89
#FFFFFF	5.89	1.00	21.00	1.00
#000000	3.57	21.00	1.00	21.00
##FFFFFF	5.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3468B6

Deuteranopia (green-blind)

#2A61B1

Tritanopia (blue-blind)

#2C6F7F

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #555cb3;
/* rgb */ color: rgb(85, 92, 179);
/* oklch */ color: oklch(51.3% 0.136 277.0);

Tailwind

colors: {
  custom: {
    50: '#8b8aca',
    500: '#555cb3',
    950: '#000000',
  },
}

SCSS

$custom: #555cb3;
$custom-light: #8b8aca;
$custom-dark: #000000;

JSON

{
  "hex": "#555cb3",
  "rgb": {
    "r": 85,
    "g": 92,
    "b": 179
  },
  "hsl": {
    "h": 235.532,
    "s": 38.211,
    "l": 51.765
  },
  "oklch": {
    "l": 0.51303,
    "c": 0.13573,
    "h": 277
  },
  "luminance": 0.1284
}

Semantic roles & 50–950 ramp

primary

#555CB3

secondary

#C7C39D

accent

#C55ACE

background

#F8F8FC

surface

#F0F0F8

border

#CBCBD1

text

#0D0B13

muted

#7D7C82

Preview Lab

Preview with #555CB3

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

Preview Lab → · Contrast checker → · Palette generator →