#555BB7#555BB7

#555BB7 is a mid, vivid blue. Relative luminance 0.128; OKLCH L 51.4% C 0.143 H 277.3°. Best body text is #FFFFFF at 5.89:1 contrast (WCAG AA passes).

Color values

HEX	#555BB7
RGB	rgb(85, 91, 183)
HSL	hsl(236, 40%, 53%)
HSV	hsv(236, 54%, 72%)
CMYK	cmyk(53.6%, 50.3%, 0%, 28.2%)
CIE-LAB	lab(42.51, 24.07, -49.65)
CIE-LCH	lch(42.51, 55.18, 295.86°)
OKLab	oklab(51.38% 0.0182 -0.1417)
OKLCH	oklch(51.38% 0.143 277.3)
XYZ	xyz(16.0319, 12.8313, 46.4225)
Luminance	0.1283 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#555BB7 #B7B155

analogous

#558CB7 #555BB7 #8055B7

triadic

#555BB7 #B7555B #5BB755

tetradic

#555BB7 #B7558C #B7B155 #55B780

square

#555BB7 #B7558C #B7B155 #55B780

split-complementary

#555BB7 #B78055 #8CB755

monochromatic

#2B2F66 #3E4391 #555BB7 #8084C9 #ABAEDB

Accessibility & contrast

On white

5.89

#555BB7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.57

#555BB7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #555BB7

5.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##555BB7	#FFFFFF	#000000	##FFFFFF
##555BB7	1.00	5.89	3.57	5.89
#FFFFFF	5.89	1.00	21.00	1.00
#000000	3.57	21.00	1.00	21.00
##FFFFFF	5.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E68BA

Deuteranopia (green-blind)

#2160B5

Tritanopia (blue-blind)

#286F80

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #555bb7;
/* rgb */ color: rgb(85, 91, 183);
/* oklch */ color: oklch(51.4% 0.143 277.3);

Tailwind

colors: {
  custom: {
    50: '#8c89cd',
    500: '#555bb7',
    950: '#000000',
  },
}

SCSS

$custom: #555bb7;
$custom-light: #8c89cd;
$custom-dark: #000000;

JSON

{
  "hex": "#555bb7",
  "rgb": {
    "r": 85,
    "g": 91,
    "b": 183
  },
  "hsl": {
    "h": 236.327,
    "s": 40.496,
    "l": 52.549
  },
  "oklch": {
    "l": 0.51375,
    "c": 0.14282,
    "h": 277.3
  },
  "luminance": 0.12832
}

Semantic roles & 50–950 ramp

primary

#555BB7

secondary

#C9C79F

accent

#C957D0

background

#F9F8FC

surface

#F1F0F9

border

#CBCBD2

text

#0D0B13

muted

#7E7C82

Preview Lab

Preview with #555BB7

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

Preview Lab → · Contrast checker → · Palette generator →