#3771BF#3771BF

#3771BF is a mid, vivid cyan. Relative luminance 0.164; OKLCH L 54.9% C 0.136 H 256.6°. Best body text is #FFFFFF at 4.91:1 contrast (WCAG AA passes).

Color values

HEX	#3771BF
RGB	rgb(55, 113, 191)
HSL	hsl(214, 55%, 48%)
HSV	hsv(214, 71%, 75%)
CMYK	cmyk(71.2%, 40.8%, 0%, 25.1%)
CIE-LAB	lab(47.47, 7.47, -46.45)
CIE-LCH	lch(47.47, 47.04, 279.13°)
OKLab	oklab(54.91% -0.0315 -0.1326)
OKLCH	oklch(54.91% 0.136 256.6)
XYZ	xyz(16.8812, 16.3823, 51.5525)
Luminance	0.1638 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3771BF #BF8537

analogous

#37B5BF #3771BF #4137BF

triadic

#3771BF #BF3771 #71BF37

tetradic

#3771BF #BF37B5 #BF8537 #37BF41

square

#3771BF #BF37B5 #BF8537 #37BF41

split-complementary

#3771BF #BF4137 #B5BF37

monochromatic

#1C3960 #29558F #3771BF #6291D2 #91B2DF

Accessibility & contrast

On white

4.91

#3771BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.28

#3771BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3771BF

4.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3771BF	#FFFFFF	#000000	##FFFFFF
##3771BF	1.00	4.91	4.28	4.91
#FFFFFF	4.91	1.00	21.00	1.00
#000000	4.28	21.00	1.00	21.00
##FFFFFF	4.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4C77C2

Deuteranopia (green-blind)

#366BBD

Tritanopia (blue-blind)

#00838F

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3771bf;
/* rgb */ color: rgb(55, 113, 191);
/* oklch */ color: oklch(54.9% 0.136 256.6);

Tailwind

colors: {
  custom: {
    50: '#7e99d3',
    500: '#3771bf',
    950: '#000000',
  },
}

SCSS

$custom: #3771bf;
$custom-light: #7e99d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3771bf",
  "rgb": {
    "r": 55,
    "g": 113,
    "b": 191
  },
  "hsl": {
    "h": 214.412,
    "s": 55.285,
    "l": 48.235
  },
  "oklch": {
    "l": 0.5491,
    "c": 0.13624,
    "h": 256.6
  },
  "luminance": 0.16384
}

Semantic roles & 50–950 ramp

primary

#3771BF

secondary

#CAAE88

accent

#9F49DF

background

#F8F9FD

surface

#EFF2FA

border

#CACCD3

text

#0B0D14

muted

#7C7E83

Preview Lab

Preview with #3771BF

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

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