#3771B8#3771B8

#3771B8 is a mid, vivid cyan. Relative luminance 0.161; OKLCH L 54.5% C 0.127 H 254.9°. Best body text is #FFFFFF at 4.98:1 contrast (WCAG AA passes).

Color values

HEX	#3771B8
RGB	rgb(55, 113, 184)
HSL	hsl(213, 54%, 47%)
HSV	hsv(213, 70%, 72%)
CMYK	cmyk(70.1%, 38.6%, 0%, 27.8%)
CIE-LAB	lab(47.08, 4.92, -43.02)
CIE-LCH	lch(47.08, 43.30, 276.52°)
OKLab	oklab(54.48% -0.0331 -0.1225)
OKLCH	oklch(54.48% 0.127 254.9)
XYZ	xyz(16.1292, 16.0815, 47.5921)
Luminance	0.1608 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3771B8 #B87E37

analogous

#37B2B8 #3771B8 #3D37B8

triadic

#3771B8 #B83771 #71B837

tetradic

#3771B8 #B837B2 #B87E37 #37B83D

square

#3771B8 #B837B2 #B87E37 #37B83D

split-complementary

#3771B8 #B83D37 #B2B837

monochromatic

#1B375A #295489 #3771B8 #5D90CF #8DB1DD

Accessibility & contrast

On white

4.98

#3771B8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.22

#3771B8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3771B8

4.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3771B8	#FFFFFF	#000000	##FFFFFF
##3771B8	1.00	4.98	4.22	4.98
#FFFFFF	4.98	1.00	21.00	1.00
#000000	4.22	21.00	1.00	21.00
##FFFFFF	4.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5176BB

Deuteranopia (green-blind)

#3D6AB7

Tritanopia (blue-blind)

#00828B

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3771b8;
/* rgb */ color: rgb(55, 113, 184);
/* oklch */ color: oklch(54.5% 0.127 254.9);

Tailwind

colors: {
  custom: {
    50: '#7d99ce',
    500: '#3771b8',
    950: '#000000',
  },
}

SCSS

$custom: #3771b8;
$custom-light: #7d99ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3771b8",
  "rgb": {
    "r": 55,
    "g": 113,
    "b": 184
  },
  "hsl": {
    "h": 213.023,
    "s": 53.975,
    "l": 46.863
  },
  "oklch": {
    "l": 0.54479,
    "c": 0.1269,
    "h": 254.9
  },
  "luminance": 0.16083
}

Semantic roles & 50–950 ramp

primary

#3771B8

secondary

#C7A984

accent

#9B4ADD

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0D13

muted

#7C7E82

Preview Lab

Preview with #3771B8

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

Preview Lab → · Contrast checker → · Palette generator →