#3B66E7#3B66E7

#3B66E7 is a mid, highly saturated blue. Relative luminance 0.162; OKLCH L 55.6% C 0.201 H 266.0°. Best body text is #FFFFFF at 4.95:1 contrast (WCAG AA passes).

Color values

HEX	#3B66E7
RGB	rgb(59, 102, 231)
HSL	hsl(225, 78%, 57%)
HSV	hsv(225, 74%, 91%)
CMYK	cmyk(74.5%, 55.8%, 0%, 9.4%)
CIE-LAB	lab(47.24, 29.58, -69.63)
CIE-LCH	lch(47.24, 75.65, 293.02°)
OKLab	oklab(55.6% -0.0141 -0.2008)
OKLCH	oklch(55.6% 0.201 266)
XYZ	xyz(20.9737, 16.1998, 77.6073)
Luminance	0.1620 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B66E7 #E7BC3B

analogous

#3BBCE7 #3B66E7 #663BE7

triadic

#3B66E7 #E73B66 #66E73B

tetradic

#3B66E7 #E73BBC #E7BC3B #3BE766

square

#3B66E7 #E73BBC #E7BC3B #3BE766

split-complementary

#3B66E7 #E7663B #BCE73B

monochromatic

#123395 #1946CC #3B66E7 #7291EE #A8BBF4

Accessibility & contrast

On white

4.95

#3B66E7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.24

#3B66E7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3B66E7

4.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B66E7	#FFFFFF	#000000	##FFFFFF
##3B66E7	1.00	4.95	4.24	4.95
#FFFFFF	4.95	1.00	21.00	1.00
#000000	4.24	21.00	1.00	21.00
##FFFFFF	4.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0078EB

Deuteranopia (green-blind)

#0068E4

Tritanopia (blue-blind)

#00869D

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3b66e7;
/* rgb */ color: rgb(59, 102, 231);
/* oklch */ color: oklch(55.6% 0.201 266.0);

Tailwind

colors: {
  custom: {
    50: '#8891f0',
    500: '#3b66e7',
    950: '#000000',
  },
}

SCSS

$custom: #3b66e7;
$custom-light: #8891f0;
$custom-dark: #000000;

JSON

{
  "hex": "#3b66e7",
  "rgb": {
    "r": 59,
    "g": 102,
    "b": 231
  },
  "hsl": {
    "h": 225,
    "s": 78.182,
    "l": 56.863
  },
  "oklch": {
    "l": 0.55603,
    "c": 0.20135,
    "h": 266
  },
  "luminance": 0.16202
}

Semantic roles & 50–950 ramp

primary

#3B66E7

secondary

#E2D09C

accent

#C433F5

background

#F9F8FE

surface

#F1F0FD

border

#CBCBD5

text

#0D0C17

muted

#7E7D85

Preview Lab

Preview with #3B66E7

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

Preview Lab → · Contrast checker → · Palette generator →