#555BB6#555BB6

#555BB6 is a mid, vivid blue. Relative luminance 0.128; OKLCH L 51.3% C 0.141 H 277.3°. Best body text is #FFFFFF at 5.90:1 contrast (WCAG AA passes).

Color values

HEX	#555BB6
RGB	rgb(85, 91, 182)
HSL	hsl(236, 40%, 52%)
HSV	hsv(236, 53%, 71%)
CMYK	cmyk(53.3%, 50%, 0%, 28.6%)
CIE-LAB	lab(42.45, 23.75, -49.17)
CIE-LCH	lch(42.45, 54.60, 295.78°)
OKLab	oklab(51.31% 0.0181 -0.1402)
OKLCH	oklch(51.31% 0.141 277.3)
XYZ	xyz(15.9282, 12.7899, 45.8763)
Luminance	0.1279 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#555BB6 #B6B055

analogous

#558BB6 #555BB6 #8055B6

triadic

#555BB6 #B6555B #5BB655

tetradic

#555BB6 #B6558B #B6B055 #55B680

square

#555BB6 #B6558B #B6B055 #55B680

split-complementary

#555BB6 #B68055 #8BB655

monochromatic

#2B2F65 #3E4390 #555BB6 #8084C8 #ABAEDB

Accessibility & contrast

On white

5.90

#555BB6 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.56

#555BB6 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #555BB6

5.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##555BB6	#FFFFFF	#000000	##FFFFFF
##555BB6	1.00	5.90	3.56	5.90
#FFFFFF	5.90	1.00	21.00	1.00
#000000	3.56	21.00	1.00	21.00
##FFFFFF	5.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F68B9

Deuteranopia (green-blind)

#2360B4

Tritanopia (blue-blind)

#296F80

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #555bb6;
/* rgb */ color: rgb(85, 91, 182);
/* oklch */ color: oklch(51.3% 0.141 277.3);

Tailwind

colors: {
  custom: {
    50: '#8c89cc',
    500: '#555bb6',
    950: '#000000',
  },
}

SCSS

$custom: #555bb6;
$custom-light: #8c89cc;
$custom-dark: #000000;

JSON

{
  "hex": "#555bb6",
  "rgb": {
    "r": 85,
    "g": 91,
    "b": 182
  },
  "hsl": {
    "h": 236.289,
    "s": 39.918,
    "l": 52.353
  },
  "oklch": {
    "l": 0.51307,
    "c": 0.1414,
    "h": 277.3
  },
  "luminance": 0.12791
}

Semantic roles & 50–950 ramp

primary

#555BB6

secondary

#C9C69E

accent

#C858D0

background

#F9F8FC

surface

#F1F0F9

border

#CBCBD2

text

#0D0B13

muted

#7E7C82

Preview Lab

Preview with #555BB6

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

Preview Lab → · Contrast checker → · Palette generator →