#5B51CD#5B51CD

#5B51CD is a mid, vivid blue. Relative luminance 0.125; OKLCH L 51.6% C 0.185 H 281.4°. Best body text is #FFFFFF at 5.99:1 contrast (WCAG AA passes).

Color values

HEX	#5B51CD
RGB	rgb(91, 81, 205)
HSL	hsl(245, 55%, 56%)
HSV	hsv(245, 60%, 80%)
CMYK	cmyk(55.6%, 60.5%, 0%, 19.6%)
CIE-LAB	lab(42.02, 38.47, -63.19)
CIE-LCH	lch(42.02, 73.98, 301.33°)
OKLab	oklab(51.61% 0.0365 -0.1814)
OKLCH	oklch(51.61% 0.185 281.4)
XYZ	xyz(18.2728, 12.5156, 59.1987)
Luminance	0.1252 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B51CD #C3CD51

analogous

#5185CD #5B51CD #9951CD

triadic

#5B51CD #CD5B51 #51CD5B

tetradic

#5B51CD #CD5185 #C3CD51 #51CD99

square

#5B51CD #CD5185 #C3CD51 #51CD99

split-complementary

#5B51CD #CD9951 #85CD51

monochromatic

#2C257F #3C32AF #5B51CD #8881DB #B5B0E8

Accessibility & contrast

On white

5.99

#5B51CD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.50

#5B51CD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5B51CD

5.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B51CD	#FFFFFF	#000000	##FFFFFF
##5B51CD	1.00	5.99	3.50	5.99
#FFFFFF	5.99	1.00	21.00	1.00
#000000	3.50	21.00	1.00	21.00
##FFFFFF	5.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0068D1

Deuteranopia (green-blind)

#005FCA

Tritanopia (blue-blind)

#226F87

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #5b51cd;
/* rgb */ color: rgb(91, 81, 205);
/* oklch */ color: oklch(51.6% 0.185 281.4);

Tailwind

colors: {
  custom: {
    50: '#9382dd',
    500: '#5b51cd',
    950: '#000000',
  },
}

SCSS

$custom: #5b51cd;
$custom-light: #9382dd;
$custom-dark: #000000;

JSON

{
  "hex": "#5b51cd",
  "rgb": {
    "r": 91,
    "g": 81,
    "b": 205
  },
  "hsl": {
    "h": 244.839,
    "s": 55.357,
    "l": 56.078
  },
  "oklch": {
    "l": 0.5161,
    "c": 0.18503,
    "h": 281.4
  },
  "luminance": 0.12517
}

Semantic roles & 50–950 ramp

primary

#5B51CD

secondary

#D2D7A3

accent

#DF49D3

background

#F9F8FD

surface

#F2EFFB

border

#CCCAD4

text

#0E0A15

muted

#7E7C83

Preview Lab

Preview with #5B51CD

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

Preview Lab → · Contrast checker → · Palette generator →