#3B66E1#3B66E1

#3B66E1 is a mid, vivid blue. Relative luminance 0.159; OKLCH L 55.1% C 0.194 H 265.7°. Best body text is #FFFFFF at 5.03:1 contrast (WCAG AA passes).

Color values

HEX	#3B66E1
RGB	rgb(59, 102, 225)
HSL	hsl(224, 73%, 56%)
HSV	hsv(224, 74%, 88%)
CMYK	cmyk(73.8%, 54.7%, 0%, 11.8%)
CIE-LAB	lab(46.80, 27.41, -66.95)
CIE-LCH	lch(46.80, 72.34, 292.26°)
OKLab	oklab(55.14% -0.0144 -0.193)
OKLCH	oklch(55.14% 0.194 265.7)
XYZ	xyz(20.1408, 15.8666, 73.2206)
Luminance	0.1587 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B66E1 #E1B63B

analogous

#3BB9E1 #3B66E1 #633BE1

triadic

#3B66E1 #E13B66 #66E13B

tetradic

#3B66E1 #E13BB9 #E1B63B #3BE163

square

#3B66E1 #E13BB9 #E1B63B #3BE163

split-complementary

#3B66E1 #E1633B #B9E13B

monochromatic

#15348C #1E48C1 #3B66E1 #708FE9 #A5B9F1

Accessibility & contrast

On white

5.03

#3B66E1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.17

#3B66E1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3B66E1

5.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B66E1	#FFFFFF	#000000	##FFFFFF
##3B66E1	1.00	5.03	4.17	5.03
#FFFFFF	5.03	1.00	21.00	1.00
#000000	4.17	21.00	1.00	21.00
##FFFFFF	5.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0077E5

Deuteranopia (green-blind)

#0068DF

Tritanopia (blue-blind)

#00849A

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #3b66e1;
/* rgb */ color: rgb(59, 102, 225);
/* oklch */ color: oklch(55.1% 0.194 265.7);

Tailwind

colors: {
  custom: {
    50: '#8791eb',
    500: '#3b66e1',
    950: '#000000',
  },
}

SCSS

$custom: #3b66e1;
$custom-light: #8791eb;
$custom-dark: #000000;

JSON

{
  "hex": "#3b66e1",
  "rgb": {
    "r": 59,
    "g": 102,
    "b": 225
  },
  "hsl": {
    "h": 224.458,
    "s": 73.451,
    "l": 55.686
  },
  "oklch": {
    "l": 0.55137,
    "c": 0.19351,
    "h": 265.7
  },
  "luminance": 0.15869
}

Semantic roles & 50–950 ramp

primary

#3B66E1

secondary

#DECD99

accent

#C038F0

background

#F9F8FE

surface

#F1F0FD

border

#CBCBD5

text

#0D0C16

muted

#7E7D84

Preview Lab

Preview with #3B66E1

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

Preview Lab → · Contrast checker → · Palette generator →