#3771BC#3771BC

#3771BC is a mid, vivid cyan. Relative luminance 0.163; OKLCH L 54.7% C 0.132 H 255.9°. Best body text is #FFFFFF at 4.94:1 contrast (WCAG AA passes).

Color values

HEX	#3771BC
RGB	rgb(55, 113, 188)
HSL	hsl(214, 55%, 48%)
HSV	hsv(214, 71%, 74%)
CMYK	cmyk(70.7%, 39.9%, 0%, 26.3%)
CIE-LAB	lab(47.30, 6.37, -44.98)
CIE-LCH	lch(47.30, 45.43, 278.06°)
OKLab	oklab(54.72% -0.0321 -0.1283)
OKLCH	oklch(54.72% 0.132 255.9)
XYZ	xyz(16.5545, 16.2516, 49.8316)
Luminance	0.1625 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3771BC #BC8237

analogous

#37B3BC #3771BC #4037BC

triadic

#3771BC #BC3771 #71BC37

tetradic

#3771BC #BC37B3 #BC8237 #37BC40

square

#3771BC #BC37B3 #BC8237 #37BC40

split-complementary

#3771BC #BC4037 #B3BC37

monochromatic

#1B385D #29558D #3771BC #6091D0 #8FB2DE

Accessibility & contrast

On white

4.94

#3771BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.25

#3771BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3771BC

4.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3771BC	#FFFFFF	#000000	##FFFFFF
##3771BC	1.00	4.94	4.25	4.94
#FFFFFF	4.94	1.00	21.00	1.00
#000000	4.25	21.00	1.00	21.00
##FFFFFF	4.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E77BF

Deuteranopia (green-blind)

#396BBA

Tritanopia (blue-blind)

#00828D

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3771bc;
/* rgb */ color: rgb(55, 113, 188);
/* oklch */ color: oklch(54.7% 0.132 255.9);

Tailwind

colors: {
  custom: {
    50: '#7e99d0',
    500: '#3771bc',
    950: '#000000',
  },
}

SCSS

$custom: #3771bc;
$custom-light: #7e99d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3771bc",
  "rgb": {
    "r": 55,
    "g": 113,
    "b": 188
  },
  "hsl": {
    "h": 213.835,
    "s": 54.733,
    "l": 47.647
  },
  "oklch": {
    "l": 0.54724,
    "c": 0.13223,
    "h": 255.9
  },
  "luminance": 0.16253
}

Semantic roles & 50–950 ramp

primary

#3771BC

secondary

#C9AC86

accent

#9D4ADE

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0D14

muted

#7C7E82

Preview Lab

Preview with #3771BC

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

Preview Lab → · Contrast checker → · Palette generator →