#3771B9#3771B9

#3771B9 is a mid, vivid cyan. Relative luminance 0.161; OKLCH L 54.5% C 0.128 H 255.2°. Best body text is #FFFFFF at 4.97:1 contrast (WCAG AA passes).

Color values

HEX	#3771B9
RGB	rgb(55, 113, 185)
HSL	hsl(213, 54%, 47%)
HSV	hsv(213, 70%, 73%)
CMYK	cmyk(70.3%, 38.9%, 0%, 27.5%)
CIE-LAB	lab(47.14, 5.28, -43.51)
CIE-LCH	lch(47.14, 43.83, 276.92°)
OKLab	oklab(54.54% -0.0328 -0.1239)
OKLCH	oklch(54.54% 0.128 255.2)
XYZ	xyz(16.2344, 16.1235, 48.1461)
Luminance	0.1613 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3771B9 #B97F37

analogous

#37B2B9 #3771B9 #3E37B9

triadic

#3771B9 #B93771 #71B937

tetradic

#3771B9 #B937B2 #B97F37 #37B93E

square

#3771B9 #B937B2 #B97F37 #37B93E

split-complementary

#3771B9 #B93E37 #B2B937

monochromatic

#1B375B #29548A #3771B9 #5E91CF #8DB1DD

Accessibility & contrast

On white

4.97

#3771B9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.22

#3771B9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3771B9

4.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3771B9	#FFFFFF	#000000	##FFFFFF
##3771B9	1.00	4.97	4.22	4.97
#FFFFFF	4.97	1.00	21.00	1.00
#000000	4.22	21.00	1.00	21.00
##FFFFFF	4.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5076BC

Deuteranopia (green-blind)

#3C6AB8

Tritanopia (blue-blind)

#00828C

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3771b9;
/* rgb */ color: rgb(55, 113, 185);
/* oklch */ color: oklch(54.5% 0.128 255.2);

Tailwind

colors: {
  custom: {
    50: '#7d99ce',
    500: '#3771b9',
    950: '#000000',
  },
}

SCSS

$custom: #3771b9;
$custom-light: #7d99ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3771b9",
  "rgb": {
    "r": 55,
    "g": 113,
    "b": 185
  },
  "hsl": {
    "h": 213.231,
    "s": 54.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.5454,
    "c": 0.12823,
    "h": 255.2
  },
  "luminance": 0.16125
}

Semantic roles & 50–950 ramp

primary

#3771B9

secondary

#C8AA84

accent

#9C4ADE

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0D14

muted

#7C7E82

Preview Lab

Preview with #3771B9

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

Preview Lab → · Contrast checker → · Palette generator →