#3771C8#3771C8

#3771C8 is a mid, vivid blue. Relative luminance 0.168; OKLCH L 55.5% C 0.148 H 258.5°. Best body text is #FFFFFF at 4.82:1 contrast (WCAG AA passes).

Color values

HEX	#3771C8
RGB	rgb(55, 113, 200)
HSL	hsl(216, 57%, 50%)
HSV	hsv(216, 73%, 78%)
CMYK	cmyk(72.5%, 43.5%, 0%, 21.6%)
CIE-LAB	lab(48.00, 10.77, -50.79)
CIE-LCH	lch(48.00, 51.92, 281.97°)
OKLab	oklab(55.48% -0.0296 -0.1453)
OKLCH	oklch(55.48% 0.148 258.5)
XYZ	xyz(17.9022, 16.7907, 56.9298)
Luminance	0.1679 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3771C8 #C88E37

analogous

#37BAC8 #3771C8 #4537C8

triadic

#3771C8 #C83771 #71C837

tetradic

#3771C8 #C837BA #C88E37 #37C845

square

#3771C8 #C837BA #C88E37 #37C845

split-complementary

#3771C8 #C84537 #BAC837

monochromatic

#1D3B68 #2A5698 #3771C8 #6793D5 #97B5E2

Accessibility & contrast

On white

4.82

#3771C8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.36

#3771C8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3771C8

4.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3771C8	#FFFFFF	#000000	##FFFFFF
##3771C8	1.00	4.82	4.36	4.82
#FFFFFF	4.82	1.00	21.00	1.00
#000000	4.36	21.00	1.00	21.00
##FFFFFF	4.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4679CB

Deuteranopia (green-blind)

#2B6CC6

Tritanopia (blue-blind)

#008593

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3771c8;
/* rgb */ color: rgb(55, 113, 200);
/* oklch */ color: oklch(55.5% 0.148 258.5);

Tailwind

colors: {
  custom: {
    50: '#8099d9',
    500: '#3771c8',
    950: '#000000',
  },
}

SCSS

$custom: #3771c8;
$custom-light: #8099d9;
$custom-dark: #000000;

JSON

{
  "hex": "#3771c8",
  "rgb": {
    "r": 55,
    "g": 113,
    "b": 200
  },
  "hsl": {
    "h": 216,
    "s": 56.863,
    "l": 50
  },
  "oklch": {
    "l": 0.55485,
    "c": 0.14829,
    "h": 258.5
  },
  "luminance": 0.16793
}

Semantic roles & 50–950 ramp

primary

#3771C8

secondary

#CEB48D

accent

#A348E0

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3771C8

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

Preview Lab → · Contrast checker → · Palette generator →