#555BCF#555BCF

#555BCF is a mid, vivid blue. Relative luminance 0.139; OKLCH L 53.1% C 0.176 H 276.4°. Best body text is #FFFFFF at 5.55:1 contrast (WCAG AA passes).

Color values

HEX	#555BCF
RGB	rgb(85, 91, 207)
HSL	hsl(237, 56%, 57%)
HSV	hsv(237, 59%, 81%)
CMYK	cmyk(58.9%, 56%, 0%, 18.8%)
CIE-LAB	lab(44.11, 31.93, -60.98)
CIE-LCH	lch(44.11, 68.83, 297.64°)
OKLab	oklab(53.09% 0.0195 -0.175)
OKLCH	oklch(53.09% 0.176 276.4)
XYZ	xyz(18.7462, 13.9171, 60.7178)
Luminance	0.1392 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#555BCF #CFC955

analogous

#5598CF #555BCF #8C55CF

triadic

#555BCF #CF555B #5BCF55

tetradic

#555BCF #CF5598 #CFC955 #55CF8C

square

#555BCF #CF5598 #CFC955 #55CF8C

split-complementary

#555BCF #CF8C55 #98CF55

monochromatic

#252A84 #3339B4 #555BCF #8589DC #B4B7EA

Accessibility & contrast

On white

5.55

#555BCF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.78

#555BCF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #555BCF

5.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##555BCF	#FFFFFF	#000000	##FFFFFF
##555BCF	1.00	5.55	3.78	5.55
#FFFFFF	5.55	1.00	21.00	1.00
#000000	3.78	21.00	1.00	21.00
##FFFFFF	5.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006ED3

Deuteranopia (green-blind)

#0063CD

Tritanopia (blue-blind)

#00768C

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #555bcf;
/* rgb */ color: rgb(85, 91, 207);
/* oklch */ color: oklch(53.1% 0.176 276.4);

Tailwind

colors: {
  custom: {
    50: '#9089de',
    500: '#555bcf',
    950: '#000000',
  },
}

SCSS

$custom: #555bcf;
$custom-light: #9089de;
$custom-dark: #000000;

JSON

{
  "hex": "#555bcf",
  "rgb": {
    "r": 85,
    "g": 91,
    "b": 207
  },
  "hsl": {
    "h": 237.049,
    "s": 55.963,
    "l": 57.255
  },
  "oklch": {
    "l": 0.5309,
    "c": 0.17605,
    "h": 276.4
  },
  "luminance": 0.13918
}

Semantic roles & 50–950 ramp

primary

#555BCF

secondary

#D9D6A7

accent

#D849DF

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0E0B15

muted

#7E7C83

Preview Lab

Preview with #555BCF

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

Preview Lab → · Contrast checker → · Palette generator →