#555FB3#555FB3

#555FB3 is a mid, vivid blue. Relative luminance 0.134; OKLCH L 51.9% C 0.132 H 275.7°. Best body text is #FFFFFF at 5.72:1 contrast (WCAG AA passes).

Color values

HEX	#555FB3
RGB	rgb(85, 95, 179)
HSL	hsl(234, 38%, 52%)
HSV	hsv(234, 53%, 70%)
CMYK	cmyk(52.5%, 46.9%, 0%, 29.8%)
CIE-LAB	lab(43.31, 20.25, -46.02)
CIE-LCH	lch(43.31, 50.28, 293.75°)
OKLab	oklab(51.91% 0.0131 -0.1309)
OKLCH	oklch(51.91% 0.132 275.7)
XYZ	xyz(15.9726, 13.3694, 44.3780)
Luminance	0.1337 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#555FB3 #B3A955

analogous

#558EB3 #555FB3 #7A55B3

triadic

#555FB3 #B3555F #5FB355

tetradic

#555FB3 #B3558E #B3A955 #55B37A

square

#555FB3 #B3558E #B3A955 #55B37A

split-complementary

#555FB3 #B37A55 #8EB355

monochromatic

#2C3262 #3F478C #555FB3 #7F87C6 #AAAFD9

Accessibility & contrast

On white

5.72

#555FB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.67

#555FB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #555FB3

5.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##555FB3	#FFFFFF	#000000	##FFFFFF
##555FB3	1.00	5.72	3.67	5.72
#FFFFFF	5.72	1.00	21.00	1.00
#000000	3.67	21.00	1.00	21.00
##FFFFFF	5.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A6AB6

Deuteranopia (green-blind)

#3063B1

Tritanopia (blue-blind)

#2C7180

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #555fb3;
/* rgb */ color: rgb(85, 95, 179);
/* oklch */ color: oklch(51.9% 0.132 275.7);

Tailwind

colors: {
  custom: {
    50: '#8b8cca',
    500: '#555fb3',
    950: '#000000',
  },
}

SCSS

$custom: #555fb3;
$custom-light: #8b8cca;
$custom-dark: #000000;

JSON

{
  "hex": "#555fb3",
  "rgb": {
    "r": 85,
    "g": 95,
    "b": 179
  },
  "hsl": {
    "h": 233.617,
    "s": 38.211,
    "l": 51.765
  },
  "oklch": {
    "l": 0.51905,
    "c": 0.1316,
    "h": 275.7
  },
  "luminance": 0.1337
}

Semantic roles & 50–950 ramp

primary

#555FB3

secondary

#C7C29D

accent

#C25ACE

background

#F8F8FC

surface

#F0F0F8

border

#CBCBD1

text

#0C0C13

muted

#7D7D82

Preview Lab

Preview with #555FB3

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

Preview Lab → · Contrast checker → · Palette generator →