#555BB5#555BB5

#555BB5 is a mid, vivid blue. Relative luminance 0.128; OKLCH L 51.2% C 0.140 H 277.4°. Best body text is #FFFFFF at 5.92:1 contrast (WCAG AA passes).

Color values

HEX	#555BB5
RGB	rgb(85, 91, 181)
HSL	hsl(236, 39%, 52%)
HSV	hsv(236, 53%, 71%)
CMYK	cmyk(53%, 49.7%, 0%, 29%)
CIE-LAB	lab(42.38, 23.42, -48.68)
CIE-LCH	lch(42.38, 54.02, 295.69°)
OKLab	oklab(51.24% 0.018 -0.1388)
OKLCH	oklch(51.24% 0.14 277.4)
XYZ	xyz(15.8253, 12.7487, 45.3339)
Luminance	0.1275 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#555BB5 #B5AF55

analogous

#558BB5 #555BB5 #7F55B5

triadic

#555BB5 #B5555B #5BB555

tetradic

#555BB5 #B5558B #B5AF55 #55B57F

square

#555BB5 #B5558B #B5AF55 #55B57F

split-complementary

#555BB5 #B57F55 #8BB555

monochromatic

#2C2F64 #3E438F #555BB5 #8084C8 #AAADDA

Accessibility & contrast

On white

5.92

#555BB5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.55

#555BB5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #555BB5

5.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##555BB5	#FFFFFF	#000000	##FFFFFF
##555BB5	1.00	5.92	3.55	5.92
#FFFFFF	5.92	1.00	21.00	1.00
#000000	3.55	21.00	1.00	21.00
##FFFFFF	5.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3068B8

Deuteranopia (green-blind)

#2460B3

Tritanopia (blue-blind)

#2A6F7F

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #555bb5;
/* rgb */ color: rgb(85, 91, 181);
/* oklch */ color: oklch(51.2% 0.140 277.4);

Tailwind

colors: {
  custom: {
    50: '#8c89cc',
    500: '#555bb5',
    950: '#000000',
  },
}

SCSS

$custom: #555bb5;
$custom-light: #8c89cc;
$custom-dark: #000000;

JSON

{
  "hex": "#555bb5",
  "rgb": {
    "r": 85,
    "g": 91,
    "b": 181
  },
  "hsl": {
    "h": 236.25,
    "s": 39.344,
    "l": 52.157
  },
  "oklch": {
    "l": 0.51239,
    "c": 0.13997,
    "h": 277.4
  },
  "luminance": 0.1275
}

Semantic roles & 50–950 ramp

primary

#555BB5

secondary

#C8C59E

accent

#C859CF

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0D0B13

muted

#7D7C82

Preview Lab

Preview with #555BB5

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

Preview Lab → · Contrast checker → · Palette generator →