#555BB3#555BB3

#555BB3 is a mid, vivid blue. Relative luminance 0.127; OKLCH L 51.1% C 0.137 H 277.4°. Best body text is #FFFFFF at 5.94:1 contrast (WCAG AA passes).

Color values

HEX	#555BB3
RGB	rgb(85, 91, 179)
HSL	hsl(236, 38%, 52%)
HSV	hsv(236, 53%, 70%)
CMYK	cmyk(52.5%, 49.2%, 0%, 29.8%)
CIE-LAB	lab(42.26, 22.77, -47.71)
CIE-LCH	lch(42.26, 52.87, 295.52°)
OKLab	oklab(51.11% 0.0177 -0.1359)
OKLCH	oklch(51.11% 0.137 277.4)
XYZ	xyz(15.6215, 12.6672, 44.2609)
Luminance	0.1267 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#555BB3 #B3AD55

analogous

#558AB3 #555BB3 #7E55B3

triadic

#555BB3 #B3555B #5BB355

tetradic

#555BB3 #B3558A #B3AD55 #55B37E

square

#555BB3 #B3558A #B3AD55 #55B37E

split-complementary

#555BB3 #B37E55 #8AB355

monochromatic

#2C2F62 #3F448C #555BB3 #7F84C6 #AAADD9

Accessibility & contrast

On white

5.94

#555BB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.53

#555BB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #555BB3

5.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##555BB3	#FFFFFF	#000000	##FFFFFF
##555BB3	1.00	5.94	3.53	5.94
#FFFFFF	5.94	1.00	21.00	1.00
#000000	3.53	21.00	1.00	21.00
##FFFFFF	5.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3268B6

Deuteranopia (green-blind)

#2760B1

Tritanopia (blue-blind)

#2C6E7E

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #555bb3;
/* rgb */ color: rgb(85, 91, 179);
/* oklch */ color: oklch(51.1% 0.137 277.4);

Tailwind

colors: {
  custom: {
    50: '#8c89ca',
    500: '#555bb3',
    950: '#000000',
  },
}

SCSS

$custom: #555bb3;
$custom-light: #8c89ca;
$custom-dark: #000000;

JSON

{
  "hex": "#555bb3",
  "rgb": {
    "r": 85,
    "g": 91,
    "b": 179
  },
  "hsl": {
    "h": 236.17,
    "s": 38.211,
    "l": 51.765
  },
  "oklch": {
    "l": 0.51105,
    "c": 0.1371,
    "h": 277.4
  },
  "luminance": 0.12668
}

Semantic roles & 50–950 ramp

primary

#555BB3

secondary

#C7C49D

accent

#C75ACE

background

#F8F8FC

surface

#F0F0F8

border

#CBCBD1

text

#0D0B13

muted

#7D7C82

Preview Lab

Preview with #555BB3

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

Preview Lab → · Contrast checker → · Palette generator →