#5155BB#5155BB

#5155BB is a mid, vivid blue. Relative luminance 0.118; OKLCH L 50.2% C 0.157 H 277.4°. Best body text is #FFFFFF at 6.24:1 contrast (WCAG AA passes).

Color values

HEX	#5155BB
RGB	rgb(81, 85, 187)
HSL	hsl(238, 44%, 53%)
HSV	hsv(238, 57%, 73%)
CMYK	cmyk(56.7%, 54.5%, 0%, 26.7%)
CIE-LAB	lab(40.95, 28.33, -54.52)
CIE-LCH	lch(40.95, 61.44, 297.46°)
OKLab	oklab(50.22% 0.0203 -0.1561)
OKLCH	oklch(50.22% 0.157 277.4)
XYZ	xyz(15.6086, 11.8331, 48.4656)
Luminance	0.1183 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5155BB #BBB751

analogous

#518ABB #5155BB #8251BB

triadic

#5155BB #BB5155 #55BB51

tetradic

#5155BB #BB518A #BBB751 #51BB82

square

#5155BB #BB518A #BBB751 #51BB82

split-complementary

#5155BB #BB8251 #8ABB51

monochromatic

#292B69 #3A3E95 #5155BB #7D80CC #A9ABDD

Accessibility & contrast

On white

6.24

#5155BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.37

#5155BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5155BB

6.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5155BB	#FFFFFF	#000000	##FFFFFF
##5155BB	1.00	6.24	3.37	6.24
#FFFFFF	6.24	1.00	21.00	1.00
#000000	3.37	21.00	1.00	21.00
##FFFFFF	6.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1365BF

Deuteranopia (green-blind)

#005CB9

Tritanopia (blue-blind)

#156D80

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #5155bb;
/* rgb */ color: rgb(81, 85, 187);
/* oklch */ color: oklch(50.2% 0.157 277.4);

Tailwind

colors: {
  custom: {
    50: '#8b84d0',
    500: '#5155bb',
    950: '#000000',
  },
}

SCSS

$custom: #5155bb;
$custom-light: #8b84d0;
$custom-dark: #000000;

JSON

{
  "hex": "#5155bb",
  "rgb": {
    "r": 81,
    "g": 85,
    "b": 187
  },
  "hsl": {
    "h": 237.736,
    "s": 43.802,
    "l": 52.549
  },
  "oklch": {
    "l": 0.50216,
    "c": 0.15744,
    "h": 277.4
  },
  "luminance": 0.11834
}

Semantic roles & 50–950 ramp

primary

#5155BB

secondary

#CBC99D

accent

#CF54D4

background

#F9F8FC

surface

#F1EFF9

border

#CBCAD2

text

#0D0B14

muted

#7E7C82

Preview Lab

Preview with #5155BB

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

Preview Lab → · Contrast checker → · Palette generator →