#5B66DB#5B66DB

#5B66DB is a mid, vivid blue. Relative luminance 0.168; OKLCH L 56.4% C 0.177 H 275.2°. Best body text is #FFFFFF at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#5B66DB
RGB	rgb(91, 102, 219)
HSL	hsl(235, 64%, 61%)
HSV	hsv(235, 58%, 86%)
CMYK	cmyk(58.4%, 53.4%, 0%, 14.1%)
CIE-LAB	lab(48.06, 30.18, -61.43)
CIE-LCH	lch(48.06, 68.44, 296.16°)
OKLab	oklab(56.4% 0.0159 -0.1761)
OKLCH	oklch(56.4% 0.177 275.2)
XYZ	xyz(21.8478, 16.8397, 69.1032)
Luminance	0.1684 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B66DB #DBD05B

analogous

#5BA6DB #5B66DB #905BDB

triadic

#5B66DB #DB5B66 #66DB5B

tetradic

#5B66DB #DB5BA6 #DBD05B #5BDB90

square

#5B66DB #DB5BA6 #DBD05B #5BDB90

split-complementary

#5B66DB #DB905B #A6DB5B

monochromatic

#222C9A #2D3ACC #5B66DB #8D95E6 #BFC4F1

Accessibility & contrast

On white

4.81

#5B66DB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.37

#5B66DB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5B66DB

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B66DB	#FFFFFF	#000000	##FFFFFF
##5B66DB	1.00	4.81	4.37	4.81
#FFFFFF	4.81	1.00	21.00	1.00
#000000	4.37	21.00	1.00	21.00
##FFFFFF	4.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B78DF

Deuteranopia (green-blind)

#006DD9

Tritanopia (blue-blind)

#008197

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #5b66db;
/* rgb */ color: rgb(91, 102, 219);
/* oklch */ color: oklch(56.4% 0.177 275.2);

Tailwind

colors: {
  custom: {
    50: '#9491e7',
    500: '#5b66db',
    950: '#000000',
  },
}

SCSS

$custom: #5b66db;
$custom-light: #9491e7;
$custom-dark: #000000;

JSON

{
  "hex": "#5b66db",
  "rgb": {
    "r": 91,
    "g": 102,
    "b": 219
  },
  "hsl": {
    "h": 234.844,
    "s": 64,
    "l": 60.784
  },
  "oklch": {
    "l": 0.564,
    "c": 0.17677,
    "h": 275.2
  },
  "luminance": 0.16841
}

Semantic roles & 50–950 ramp

primary

#5B66DB

secondary

#E1DDB1

accent

#BC1ACC

background

#F9F8FE

surface

#F2F0FC

border

#CCCBD5

text

#0E0C16

muted

#7E7D84

Preview Lab

Preview with #5B66DB

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

Preview Lab → · Contrast checker → · Palette generator →