#3771BB#3771BB

#3771BB is a mid, vivid cyan. Relative luminance 0.162; OKLCH L 54.7% C 0.131 H 255.7°. Best body text is #FFFFFF at 4.95:1 contrast (WCAG AA passes).

Color values

HEX	#3771BB
RGB	rgb(55, 113, 187)
HSL	hsl(214, 55%, 47%)
HSV	hsv(214, 71%, 73%)
CMYK	cmyk(70.6%, 39.6%, 0%, 26.7%)
CIE-LAB	lab(47.25, 6.01, -44.49)
CIE-LCH	lch(47.25, 44.90, 277.69°)
OKLab	oklab(54.66% -0.0324 -0.1268)
OKLCH	oklch(54.66% 0.131 255.7)
XYZ	xyz(16.4470, 16.2086, 49.2659)
Luminance	0.1621 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3771BB #BB8137

analogous

#37B3BB #3771BB #3F37BB

triadic

#3771BB #BB3771 #71BB37

tetradic

#3771BB #BB37B3 #BB8137 #37BB3F

square

#3771BB #BB37B3 #BB8137 #37BB3F

split-complementary

#3771BB #BB3F37 #B3BB37

monochromatic

#1B385C #29548C #3771BB #5F91D0 #8EB1DE

Accessibility & contrast

On white

4.95

#3771BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.24

#3771BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3771BB

4.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3771BB	#FFFFFF	#000000	##FFFFFF
##3771BB	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)

#4F77BE

Deuteranopia (green-blind)

#3A6ABA

Tritanopia (blue-blind)

#00828D

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3771bb;
/* rgb */ color: rgb(55, 113, 187);
/* oklch */ color: oklch(54.7% 0.131 255.7);

Tailwind

colors: {
  custom: {
    50: '#7d99d0',
    500: '#3771bb',
    950: '#000000',
  },
}

SCSS

$custom: #3771bb;
$custom-light: #7d99d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3771bb",
  "rgb": {
    "r": 55,
    "g": 113,
    "b": 187
  },
  "hsl": {
    "h": 213.636,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.54662,
    "c": 0.1309,
    "h": 255.7
  },
  "luminance": 0.1621
}

Semantic roles & 50–950 ramp

primary

#3771BB

secondary

#C9AB85

accent

#9D4ADE

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0D14

muted

#7C7E82

Preview Lab

Preview with #3771BB

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

Preview Lab → · Contrast checker → · Palette generator →