#5B66E7#5B66E7

#5B66E7 is a mid, vivid blue. Relative luminance 0.175; OKLCH L 57.3% C 0.193 H 274.9°. Best body text is #FFFFFF at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#5B66E7
RGB	rgb(91, 102, 231)
HSL	hsl(235, 74%, 63%)
HSV	hsv(235, 61%, 91%)
CMYK	cmyk(60.6%, 55.8%, 0%, 9.4%)
CIE-LAB	lab(48.88, 34.11, -66.89)
CIE-LCH	lch(48.88, 75.08, 297.02°)
OKLab	oklab(57.27% 0.0163 -0.1921)
OKLCH	oklch(57.27% 0.193 274.9)
XYZ	xyz(23.4848, 17.4945, 77.7250)
Luminance	0.1750 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B66E7 #E7DC5B

analogous

#5BACE7 #5B66E7 #965BE7

triadic

#5B66E7 #E75B66 #66E75B

tetradic

#5B66E7 #E75BAC #E7DC5B #5BE796

square

#5B66E7 #E75BAC #E7DC5B #5BE796

split-complementary

#5B66E7 #E7965B #ACE75B

monochromatic

#1925AE #2634DF #5B66E7 #9098EF #C6CAF7

Accessibility & contrast

On white

4.67

#5B66E7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.50

#5B66E7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #5B66E7

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B66E7	#FFFFFF	#000000	##FFFFFF
##5B66E7	1.00	4.67	4.50	4.67
#FFFFFF	4.67	1.00	21.00	1.00
#000000	4.50	21.00	1.00	21.00
##FFFFFF	4.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#007AEB

Deuteranopia (green-blind)

#006EE4

Tritanopia (blue-blind)

#00859D

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #5b66e7;
/* rgb */ color: rgb(91, 102, 231);
/* oklch */ color: oklch(57.3% 0.193 274.9);

Tailwind

colors: {
  custom: {
    50: '#9691ef',
    500: '#5b66e7',
    950: '#000000',
  },
}

SCSS

$custom: #5b66e7;
$custom-light: #9691ef;
$custom-dark: #000000;

JSON

{
  "hex": "#5b66e7",
  "rgb": {
    "r": 91,
    "g": 102,
    "b": 231
  },
  "hsl": {
    "h": 235.286,
    "s": 74.468,
    "l": 63.137
  },
  "oklch": {
    "l": 0.57273,
    "c": 0.19279,
    "h": 274.9
  },
  "luminance": 0.17496
}

Semantic roles & 50–950 ramp

primary

#5B66E7

secondary

#E8E4B6

accent

#C70FD7

background

#F9F8FE

surface

#F2F0FD

border

#CCCBD5

text

#0F0C17

muted

#7E7D85

Preview Lab

Preview with #5B66E7

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

Preview Lab → · Contrast checker → · Palette generator →