#555BBF#555BBF

#555BBF is a mid, vivid blue. Relative luminance 0.132; OKLCH L 51.9% C 0.154 H 277.0°. Best body text is #FFFFFF at 5.78:1 contrast (WCAG AA passes).

Color values

HEX	#555BBF
RGB	rgb(85, 91, 191)
HSL	hsl(237, 45%, 54%)
HSV	hsv(237, 55%, 75%)
CMYK	cmyk(55.5%, 52.4%, 0%, 25.1%)
CIE-LAB	lab(43.02, 26.68, -53.49)
CIE-LCH	lch(43.02, 59.77, 296.51°)
OKLab	oklab(51.93% 0.0188 -0.1529)
OKLCH	oklch(51.93% 0.154 277)
XYZ	xyz(16.8884, 13.1739, 50.9330)
Luminance	0.1318 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#555BBF #BFB955

analogous

#5590BF #555BBF #8455BF

triadic

#555BBF #BF555B #5BBF55

tetradic

#555BBF #BF5590 #BFB955 #55BF84

square

#555BBF #BF5590 #BFB955 #55BF84

split-complementary

#555BBF #BF8455 #90BF55

monochromatic

#2A2E70 #3B409C #555BBF #8186D0 #AEB1E0

Accessibility & contrast

On white

5.78

#555BBF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.64

#555BBF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #555BBF

5.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##555BBF	#FFFFFF	#000000	##FFFFFF
##555BBF	1.00	5.78	3.64	5.78
#FFFFFF	5.78	1.00	21.00	1.00
#000000	3.64	21.00	1.00	21.00
##FFFFFF	5.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#236AC3

Deuteranopia (green-blind)

#0F61BD

Tritanopia (blue-blind)

#1E7284

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #555bbf;
/* rgb */ color: rgb(85, 91, 191);
/* oklch */ color: oklch(51.9% 0.154 277.0);

Tailwind

colors: {
  custom: {
    50: '#8d89d3',
    500: '#555bbf',
    950: '#000000',
  },
}

SCSS

$custom: #555bbf;
$custom-light: #8d89d3;
$custom-dark: #000000;

JSON

{
  "hex": "#555bbf",
  "rgb": {
    "r": 85,
    "g": 91,
    "b": 191
  },
  "hsl": {
    "h": 236.604,
    "s": 45.299,
    "l": 54.118
  },
  "oklch": {
    "l": 0.51928,
    "c": 0.15409,
    "h": 277
  },
  "luminance": 0.13175
}

Semantic roles & 50–950 ramp

primary

#555BBF

secondary

#CECCA1

accent

#CE53D5

background

#F9F8FD

surface

#F1F0FA

border

#CBCBD3

text

#0D0B14

muted

#7E7C83

Preview Lab

Preview with #555BBF

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

Preview Lab → · Contrast checker → · Palette generator →