#555CB9#555CB9

#555CB9 is a mid, vivid blue. Relative luminance 0.131; OKLCH L 51.7% C 0.144 H 276.9°. Best body text is #FFFFFF at 5.80:1 contrast (WCAG AA passes).

Color values

HEX	#555CB9
RGB	rgb(85, 92, 185)
HSL	hsl(236, 42%, 53%)
HSV	hsv(236, 54%, 73%)
CMYK	cmyk(54.1%, 50.3%, 0%, 27.5%)
CIE-LAB	lab(42.89, 24.09, -50.20)
CIE-LCH	lch(42.89, 55.68, 295.64°)
OKLab	oklab(51.71% 0.0172 -0.1433)
OKLCH	oklch(51.71% 0.144 276.9)
XYZ	xyz(16.3276, 13.0873, 47.5553)
Luminance	0.1309 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#555CB9 #B9B255

analogous

#558EB9 #555CB9 #8055B9

triadic

#555CB9 #B9555C #5CB955

tetradic

#555CB9 #B9558E #B9B255 #55B980

square

#555CB9 #B9558E #B9B255 #55B980

split-complementary

#555CB9 #B98055 #8EB955

monochromatic

#2B2F69 #3D4394 #555CB9 #8086CB #ACAFDD

Accessibility & contrast

On white

5.80

#555CB9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.62

#555CB9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #555CB9

5.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##555CB9	#FFFFFF	#000000	##FFFFFF
##555CB9	1.00	5.80	3.62	5.80
#FFFFFF	5.80	1.00	21.00	1.00
#000000	3.62	21.00	1.00	21.00
##FFFFFF	5.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E69BC

Deuteranopia (green-blind)

#2161B7

Tritanopia (blue-blind)

#267182

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #555cb9;
/* rgb */ color: rgb(85, 92, 185);
/* oklch */ color: oklch(51.7% 0.144 276.9);

Tailwind

colors: {
  custom: {
    50: '#8c8acf',
    500: '#555cb9',
    950: '#000000',
  },
}

SCSS

$custom: #555cb9;
$custom-light: #8c8acf;
$custom-dark: #000000;

JSON

{
  "hex": "#555cb9",
  "rgb": {
    "r": 85,
    "g": 92,
    "b": 185
  },
  "hsl": {
    "h": 235.8,
    "s": 41.667,
    "l": 52.941
  },
  "oklch": {
    "l": 0.51707,
    "c": 0.14429,
    "h": 276.9
  },
  "luminance": 0.13088
}

Semantic roles & 50–950 ramp

primary

#555CB9

secondary

#CBC79F

accent

#C956D1

background

#F9F8FC

surface

#F1F0F9

border

#CBCBD2

text

#0D0B14

muted

#7E7C82

Preview Lab

Preview with #555CB9

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

Preview Lab → · Contrast checker → · Palette generator →