#3771D7#3771D7

#3771D7 is a mid, vivid blue. Relative luminance 0.175; OKLCH L 56.5% C 0.168 H 260.8°. Best body text is #FFFFFF at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#3771D7
RGB	rgb(55, 113, 215)
HSL	hsl(218, 67%, 53%)
HSV	hsv(218, 74%, 84%)
CMYK	cmyk(74.4%, 47.4%, 0%, 15.7%)
CIE-LAB	lab(48.92, 16.30, -57.86)
CIE-LCH	lch(48.92, 60.11, 285.73°)
OKLab	oklab(56.49% -0.027 -0.1661)
OKLCH	oklch(56.49% 0.168 260.8)
XYZ	xyz(19.7420, 17.5266, 66.6193)
Luminance	0.1753 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3771D7 #D79D37

analogous

#37C1D7 #3771D7 #4D37D7

triadic

#3771D7 #D73771 #71D737

tetradic

#3771D7 #D737C1 #D79D37 #37D74D

square

#3771D7 #D737C1 #D79D37 #37D74D

split-complementary

#3771D7 #D74D37 #C1D737

monochromatic

#193C7B #2355AE #3771D7 #6A95E1 #9DB9EB

Accessibility & contrast

On white

4.66

#3771D7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.51

#3771D7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3771D7

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3771D7	#FFFFFF	#000000	##FFFFFF
##3771D7	1.00	4.66	4.51	4.66
#FFFFFF	4.66	1.00	21.00	1.00
#000000	4.51	21.00	1.00	21.00
##FFFFFF	4.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#397CDB

Deuteranopia (green-blind)

#046DD5

Tritanopia (blue-blind)

#00899A

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3771d7;
/* rgb */ color: rgb(55, 113, 215);
/* oklch */ color: oklch(56.5% 0.168 260.8);

Tailwind

colors: {
  custom: {
    50: '#8399e4',
    500: '#3771d7',
    950: '#000000',
  },
}

SCSS

$custom: #3771d7;
$custom-light: #8399e4;
$custom-dark: #000000;

JSON

{
  "hex": "#3771d7",
  "rgb": {
    "r": 55,
    "g": 113,
    "b": 215
  },
  "hsl": {
    "h": 218.25,
    "s": 66.667,
    "l": 52.941
  },
  "oklch": {
    "l": 0.56492,
    "c": 0.16831,
    "h": 260.8
  },
  "luminance": 0.17529
}

Semantic roles & 50–950 ramp

primary

#3771D7

secondary

#D7BE92

accent

#AB3EEA

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0D16

muted

#7D7E84

Preview Lab

Preview with #3771D7

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

Preview Lab → · Contrast checker → · Palette generator →