#555BB4#555BB4

#555BB4 is a mid, vivid blue. Relative luminance 0.127; OKLCH L 51.2% C 0.139 H 277.4°. Best body text is #FFFFFF at 5.93:1 contrast (WCAG AA passes).

Color values

HEX	#555BB4
RGB	rgb(85, 91, 180)
HSL	hsl(236, 39%, 52%)
HSV	hsv(236, 53%, 71%)
CMYK	cmyk(52.8%, 49.4%, 0%, 29.4%)
CIE-LAB	lab(42.32, 23.10, -48.20)
CIE-LCH	lch(42.32, 53.45, 295.60°)
OKLab	oklab(51.17% 0.0179 -0.1374)
OKLCH	oklch(51.17% 0.139 277.4)
XYZ	xyz(15.7230, 12.7078, 44.7955)
Luminance	0.1271 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#555BB4 #B4AE55

analogous

#558AB4 #555BB4 #7F55B4

triadic

#555BB4 #B4555B #5BB455

tetradic

#555BB4 #B4558A #B4AE55 #55B47F

square

#555BB4 #B4558A #B4AE55 #55B47F

split-complementary

#555BB4 #B47F55 #8AB455

monochromatic

#2C2F63 #3E438D #555BB4 #7F84C7 #AAADD9

Accessibility & contrast

On white

5.93

#555BB4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.54

#555BB4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #555BB4

5.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##555BB4	#FFFFFF	#000000	##FFFFFF
##555BB4	1.00	5.93	3.54	5.93
#FFFFFF	5.93	1.00	21.00	1.00
#000000	3.54	21.00	1.00	21.00
##FFFFFF	5.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3168B7

Deuteranopia (green-blind)

#2660B2

Tritanopia (blue-blind)

#2B6F7F

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #555bb4;
/* rgb */ color: rgb(85, 91, 180);
/* oklch */ color: oklch(51.2% 0.139 277.4);

Tailwind

colors: {
  custom: {
    50: '#8c89cb',
    500: '#555bb4',
    950: '#000000',
  },
}

SCSS

$custom: #555bb4;
$custom-light: #8c89cb;
$custom-dark: #000000;

JSON

{
  "hex": "#555bb4",
  "rgb": {
    "r": 85,
    "g": 91,
    "b": 180
  },
  "hsl": {
    "h": 236.211,
    "s": 38.776,
    "l": 51.961
  },
  "oklch": {
    "l": 0.51172,
    "c": 0.13855,
    "h": 277.4
  },
  "luminance": 0.12709
}

Semantic roles & 50–950 ramp

primary

#555BB4

secondary

#C7C59E

accent

#C759CF

background

#F8F8FC

surface

#F0F0F8

border

#CBCBD1

text

#0D0B13

muted

#7D7C82

Preview Lab

Preview with #555BB4

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

Preview Lab → · Contrast checker → · Palette generator →