#555CB2#555CB2

#555CB2 is a mid, vivid blue. Relative luminance 0.128; OKLCH L 51.2% C 0.134 H 277.0°. Best body text is #FFFFFF at 5.90:1 contrast (WCAG AA passes).

Color values

HEX	#555CB2
RGB	rgb(85, 92, 178)
HSL	hsl(235, 38%, 52%)
HSV	hsv(235, 52%, 70%)
CMYK	cmyk(52.2%, 48.3%, 0%, 30.2%)
CIE-LAB	lab(42.46, 21.82, -46.80)
CIE-LCH	lch(42.46, 51.64, 295.00°)
OKLab	oklab(51.24% 0.0165 -0.1333)
OKLCH	oklch(51.24% 0.134 277)
XYZ	xyz(15.6068, 12.7990, 43.7589)
Luminance	0.1280 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#555CB2 #B2AB55

analogous

#558BB2 #555CB2 #7D55B2

triadic

#555CB2 #B2555C #5CB255

tetradic

#555CB2 #B2558B #B2AB55 #55B27D

square

#555CB2 #B2558B #B2AB55 #55B27D

split-complementary

#555CB2 #B27D55 #8BB255

monochromatic

#2C3061 #3F458B #555CB2 #7F84C5 #A9ADD8

Accessibility & contrast

On white

5.90

#555CB2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.56

#555CB2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #555CB2

5.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##555CB2	#FFFFFF	#000000	##FFFFFF
##555CB2	1.00	5.90	3.56	5.90
#FFFFFF	5.90	1.00	21.00	1.00
#000000	3.56	21.00	1.00	21.00
##FFFFFF	5.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3568B5

Deuteranopia (green-blind)

#2B61B0

Tritanopia (blue-blind)

#2D6F7E

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #555cb2;
/* rgb */ color: rgb(85, 92, 178);
/* oklch */ color: oklch(51.2% 0.134 277.0);

Tailwind

colors: {
  custom: {
    50: '#8b8ac9',
    500: '#555cb2',
    950: '#000000',
  },
}

SCSS

$custom: #555cb2;
$custom-light: #8b8ac9;
$custom-dark: #000000;

JSON

{
  "hex": "#555cb2",
  "rgb": {
    "r": 85,
    "g": 92,
    "b": 178
  },
  "hsl": {
    "h": 235.484,
    "s": 37.652,
    "l": 51.569
  },
  "oklch": {
    "l": 0.51237,
    "c": 0.13429,
    "h": 277
  },
  "luminance": 0.128
}

Semantic roles & 50–950 ramp

primary

#555CB2

secondary

#C6C39D

accent

#C55ACE

background

#F8F8FC

surface

#F0F0F8

border

#CBCBD1

text

#0C0B13

muted

#7D7C82

Preview Lab

Preview with #555CB2

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

Preview Lab → · Contrast checker → · Palette generator →