#5B66DA#5B66DA

#5B66DA is a mid, vivid blue. Relative luminance 0.168; OKLCH L 56.3% C 0.175 H 275.2°. Best body text is #FFFFFF at 4.82:1 contrast (WCAG AA passes).

Color values

HEX	#5B66DA
RGB	rgb(91, 102, 218)
HSL	hsl(235, 63%, 61%)
HSV	hsv(235, 58%, 85%)
CMYK	cmyk(58.3%, 53.2%, 0%, 14.5%)
CIE-LAB	lab(47.99, 29.85, -60.97)
CIE-LCH	lch(47.99, 67.88, 296.08°)
OKLab	oklab(56.33% 0.0158 -0.1747)
OKLCH	oklch(56.33% 0.175 275.2)
XYZ	xyz(21.7165, 16.7872, 68.4119)
Luminance	0.1679 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B66DA #DACF5B

analogous

#5BA5DA #5B66DA #8F5BDA

triadic

#5B66DA #DA5B66 #66DA5B

tetradic

#5B66DA #DA5BA5 #DACF5B #5BDA8F

square

#5B66DA #DA5BA5 #DACF5B #5BDA8F

split-complementary

#5B66DA #DA8F5B #A5DA5B

monochromatic

#222D98 #2E3BCA #5B66DA #8D95E5 #BFC3F1

Accessibility & contrast

On white

4.82

#5B66DA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.36

#5B66DA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5B66DA

4.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B66DA	#FFFFFF	#000000	##FFFFFF
##5B66DA	1.00	4.82	4.36	4.82
#FFFFFF	4.82	1.00	21.00	1.00
#000000	4.36	21.00	1.00	21.00
##FFFFFF	4.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D77DE

Deuteranopia (green-blind)

#006DD8

Tritanopia (blue-blind)

#008196

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #5b66da;
/* rgb */ color: rgb(91, 102, 218);
/* oklch */ color: oklch(56.3% 0.175 275.2);

Tailwind

colors: {
  custom: {
    50: '#9491e6',
    500: '#5b66da',
    950: '#000000',
  },
}

SCSS

$custom: #5b66da;
$custom-light: #9491e6;
$custom-dark: #000000;

JSON

{
  "hex": "#5b66da",
  "rgb": {
    "r": 91,
    "g": 102,
    "b": 218
  },
  "hsl": {
    "h": 234.803,
    "s": 63.184,
    "l": 60.588
  },
  "oklch": {
    "l": 0.56329,
    "c": 0.17541,
    "h": 275.2
  },
  "luminance": 0.16789
}

Semantic roles & 50–950 ramp

primary

#5B66DA

secondary

#E1DCB0

accent

#BC1BCB

background

#F9F8FE

surface

#F2F0FC

border

#CCCBD5

text

#0E0C16

muted

#7E7D84

Preview Lab

Preview with #5B66DA

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

Preview Lab → · Contrast checker → · Palette generator →