#555EB5#555EB5

#555EB5 is a mid, vivid blue. Relative luminance 0.133; OKLCH L 51.8% C 0.136 H 276.1°. Best body text is #FFFFFF at 5.75:1 contrast (WCAG AA passes).

Color values

HEX	#555EB5
RGB	rgb(85, 94, 181)
HSL	hsl(234, 39%, 52%)
HSV	hsv(234, 53%, 71%)
CMYK	cmyk(53%, 48.1%, 0%, 29%)
CIE-LAB	lab(43.17, 21.53, -47.42)
CIE-LCH	lch(43.17, 52.08, 294.42°)
OKLab	oklab(51.84% 0.0145 -0.1351)
OKLCH	oklch(51.84% 0.136 276.1)
XYZ	xyz(16.0869, 13.2719, 45.4211)
Luminance	0.1327 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#555EB5 #B5AC55

analogous

#558EB5 #555EB5 #7C55B5

triadic

#555EB5 #B5555E #5EB555

tetradic

#555EB5 #B5558E #B5AC55 #55B57C

square

#555EB5 #B5558E #B5AC55 #55B57C

split-complementary

#555EB5 #B57C55 #8EB555

monochromatic

#2C3164 #3E468F #555EB5 #8086C8 #AAAFDA

Accessibility & contrast

On white

5.75

#555EB5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.65

#555EB5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #555EB5

5.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##555EB5	#FFFFFF	#000000	##FFFFFF
##555EB5	1.00	5.75	3.65	5.75
#FFFFFF	5.75	1.00	21.00	1.00
#000000	3.65	21.00	1.00	21.00
##FFFFFF	5.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#366AB8

Deuteranopia (green-blind)

#2B62B3

Tritanopia (blue-blind)

#2A7181

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #555eb5;
/* rgb */ color: rgb(85, 94, 181);
/* oklch */ color: oklch(51.8% 0.136 276.1);

Tailwind

colors: {
  custom: {
    50: '#8c8bcc',
    500: '#555eb5',
    950: '#000000',
  },
}

SCSS

$custom: #555eb5;
$custom-light: #8c8bcc;
$custom-dark: #000000;

JSON

{
  "hex": "#555eb5",
  "rgb": {
    "r": 85,
    "g": 94,
    "b": 181
  },
  "hsl": {
    "h": 234.375,
    "s": 39.344,
    "l": 52.157
  },
  "oklch": {
    "l": 0.51835,
    "c": 0.13586,
    "h": 276.1
  },
  "luminance": 0.13273
}

Semantic roles & 50–950 ramp

primary

#555EB5

secondary

#C8C49E

accent

#C459CF

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0D0C13

muted

#7D7D82

Preview Lab

Preview with #555EB5

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

Preview Lab → · Contrast checker → · Palette generator →