#555FBB#555FBB

#555FBB is a mid, vivid blue. Relative luminance 0.137; OKLCH L 52.4% C 0.143 H 275.6°. Best body text is #FFFFFF at 5.61:1 contrast (WCAG AA passes).

Color values

HEX	#555FBB
RGB	rgb(85, 95, 187)
HSL	hsl(234, 43%, 53%)
HSV	hsv(234, 55%, 73%)
CMYK	cmyk(54.5%, 49.2%, 0%, 26.7%)
CIE-LAB	lab(43.80, 22.86, -49.91)
CIE-LCH	lch(43.80, 54.90, 294.61°)
OKLab	oklab(52.43% 0.0141 -0.1424)
OKLCH	oklch(52.43% 0.143 275.6)
XYZ	xyz(16.8053, 13.7024, 48.7634)
Luminance	0.1370 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#555FBB #BBB155

analogous

#5592BB #555FBB #7E55BB

triadic

#555FBB #BB555F #5FBB55

tetradic

#555FBB #BB5592 #BBB155 #55BB7E

square

#555FBB #BB5592 #BBB155 #55BB7E

split-complementary

#555FBB #BB7E55 #92BB55

monochromatic

#2B316B #3C4597 #555FBB #8188CC #ACB1DE

Accessibility & contrast

On white

5.61

#555FBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.74

#555FBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #555FBB

5.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##555FBB	#FFFFFF	#000000	##FFFFFF
##555FBB	1.00	5.61	3.74	5.61
#FFFFFF	5.61	1.00	21.00	1.00
#000000	3.74	21.00	1.00	21.00
##FFFFFF	5.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#326CBE

Deuteranopia (green-blind)

#2563B9

Tritanopia (blue-blind)

#237384

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #555fbb;
/* rgb */ color: rgb(85, 95, 187);
/* oklch */ color: oklch(52.4% 0.143 275.6);

Tailwind

colors: {
  custom: {
    50: '#8c8cd0',
    500: '#555fbb',
    950: '#000000',
  },
}

SCSS

$custom: #555fbb;
$custom-light: #8c8cd0;
$custom-dark: #000000;

JSON

{
  "hex": "#555fbb",
  "rgb": {
    "r": 85,
    "g": 95,
    "b": 187
  },
  "hsl": {
    "h": 234.118,
    "s": 42.857,
    "l": 53.333
  },
  "oklch": {
    "l": 0.52433,
    "c": 0.14307,
    "h": 275.6
  },
  "luminance": 0.13704
}

Semantic roles & 50–950 ramp

primary

#555FBB

secondary

#CCC8A0

accent

#C655D3

background

#F9F8FC

surface

#F1F0F9

border

#CBCBD2

text

#0D0C14

muted

#7E7D82

Preview Lab

Preview with #555FBB

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

Preview Lab → · Contrast checker → · Palette generator →