#3771E5#3771E5

#3771E5 is a mid, vivid blue. Relative luminance 0.183; OKLCH L 57.5% C 0.187 H 262.2°. Best body text is #000000 at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#3771E5
RGB	rgb(55, 113, 229)
HSL	hsl(220, 77%, 56%)
HSV	hsv(220, 76%, 90%)
CMYK	cmyk(76%, 50.7%, 0%, 10.2%)
CIE-LAB	lab(49.83, 21.46, -64.30)
CIE-LCH	lch(49.83, 67.79, 288.45°)
OKLab	oklab(57.48% -0.0252 -0.1851)
OKLCH	oklch(57.48% 0.187 262.2)
XYZ	xyz(21.6185, 18.2772, 76.5020)
Luminance	0.1828 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3771E5 #E5AB37

analogous

#37C8E5 #3771E5 #5437E5

triadic

#3771E5 #E53771 #71E537

tetradic

#3771E5 #E537C8 #E5AB37 #37E554

square

#3771E5 #E537C8 #E5AB37 #37E554

split-complementary

#3771E5 #E55437 #C8E537

monochromatic

#133C8F #1A53C5 #3771E5 #6D97EC #A3BEF3

Accessibility & contrast

On white

4.51

#3771E5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.66

#3771E5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3771E5

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3771E5	#FFFFFF	#000000	##000000
##3771E5	1.00	4.51	4.66	4.66
#FFFFFF	4.51	1.00	21.00	21.00
#000000	4.66	21.00	1.00	1.00
##000000	4.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#267FE9

Deuteranopia (green-blind)

#006FE3

Tritanopia (blue-blind)

#008DA0

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3771e5;
/* rgb */ color: rgb(55, 113, 229);
/* oklch */ color: oklch(57.5% 0.187 262.2);

Tailwind

colors: {
  custom: {
    50: '#8699ee',
    500: '#3771e5',
    950: '#000000',
  },
}

SCSS

$custom: #3771e5;
$custom-light: #8699ee;
$custom-dark: #000000;

JSON

{
  "hex": "#3771e5",
  "rgb": {
    "r": 55,
    "g": 113,
    "b": 229
  },
  "hsl": {
    "h": 220,
    "s": 76.991,
    "l": 55.686
  },
  "oklch": {
    "l": 0.57483,
    "c": 0.18677,
    "h": 262.2
  },
  "luminance": 0.1828
}

Semantic roles & 50–950 ramp

primary

#3771E5

secondary

#E0C898

accent

#B434F4

background

#F9F9FE

surface

#F1F2FD

border

#CBCCD5

text

#0D0D16

muted

#7E7E84

Preview Lab

Preview with #3771E5

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

Preview Lab → · Contrast checker → · Palette generator →