#5B51DB#5B51DB

#5B51DB is a mid, highly saturated blue. Relative luminance 0.132; OKLCH L 52.7% C 0.203 H 280.1°. Best body text is #FFFFFF at 5.76:1 contrast (WCAG AA passes).

Color values

HEX	#5B51DB
RGB	rgb(91, 81, 219)
HSL	hsl(244, 66%, 59%)
HSV	hsv(244, 63%, 86%)
CMYK	cmyk(58.4%, 63%, 0%, 14.1%)
CIE-LAB	lab(43.10, 42.86, -69.48)
CIE-LCH	lch(43.10, 81.64, 301.67°)
OKLab	oklab(52.73% 0.0356 -0.1999)
OKLCH	oklch(52.73% 0.203 280.1)
XYZ	xyz(20.0390, 13.2221, 68.5002)
Luminance	0.1322 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B51DB #D1DB51

analogous

#518CDB #5B51DB #A051DB

triadic

#5B51DB #DB5B51 #51DB5B

tetradic

#5B51DB #DB518C #D1DB51 #51DBA0

square

#5B51DB #DB518C #D1DB51 #51DBA0

split-complementary

#5B51DB #DBA051 #8CDB51

monochromatic

#271E93 #3429C6 #5B51DB #8B84E5 #BBB6F0

Accessibility & contrast

On white

5.76

#5B51DB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.64

#5B51DB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5B51DB

5.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B51DB	#FFFFFF	#000000	##FFFFFF
##5B51DB	1.00	5.76	3.64	5.76
#FFFFFF	5.76	1.00	21.00	1.00
#000000	3.64	21.00	1.00	21.00
##FFFFFF	5.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006BDF

Deuteranopia (green-blind)

#0060D8

Tritanopia (blue-blind)

#00738F

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #5b51db;
/* rgb */ color: rgb(91, 81, 219);
/* oklch */ color: oklch(52.7% 0.203 280.1);

Tailwind

colors: {
  custom: {
    50: '#9682e7',
    500: '#5b51db',
    950: '#000000',
  },
}

SCSS

$custom: #5b51db;
$custom-light: #9682e7;
$custom-dark: #000000;

JSON

{
  "hex": "#5b51db",
  "rgb": {
    "r": 91,
    "g": 81,
    "b": 219
  },
  "hsl": {
    "h": 244.348,
    "s": 65.714,
    "l": 58.824
  },
  "oklch": {
    "l": 0.5273,
    "c": 0.20302,
    "h": 280.1
  },
  "luminance": 0.13223
}

Semantic roles & 50–950 ramp

primary

#5B51DB

secondary

#DBDFA9

accent

#E93FDC

background

#F9F8FE

surface

#F2EFFD

border

#CCCAD5

text

#0F0A16

muted

#7E7C84

Preview Lab

Preview with #5B51DB

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

Preview Lab → · Contrast checker → · Palette generator →