#3770BC#3770BC

#3770BC is a mid, vivid cyan. Relative luminance 0.160; OKLCH L 54.5% C 0.133 H 256.5°. Best body text is #FFFFFF at 4.99:1 contrast (WCAG AA passes).

Color values

HEX	#3770BC
RGB	rgb(55, 112, 188)
HSL	hsl(214, 55%, 48%)
HSV	hsv(214, 71%, 74%)
CMYK	cmyk(70.7%, 40.4%, 0%, 26.3%)
CIE-LAB	lab(47.01, 7.00, -45.44)
CIE-LCH	lch(47.01, 45.98, 278.75°)
OKLab	oklab(54.5% -0.0312 -0.1296)
OKLCH	oklch(54.5% 0.133 256.5)
XYZ	xyz(16.4435, 16.0297, 49.7946)
Luminance	0.1603 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3770BC #BC8337

analogous

#37B2BC #3770BC #4137BC

triadic

#3770BC #BC3770 #70BC37

tetradic

#3770BC #BC37B2 #BC8337 #37BC41

square

#3770BC #BC37B2 #BC8337 #37BC41

split-complementary

#3770BC #BC4137 #B2BC37

monochromatic

#1B385D #29548D #3770BC #6090D0 #8FB1DE

Accessibility & contrast

On white

4.99

#3770BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.21

#3770BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3770BC

4.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3770BC	#FFFFFF	#000000	##FFFFFF
##3770BC	1.00	4.99	4.21	4.99
#FFFFFF	4.99	1.00	21.00	1.00
#000000	4.21	21.00	1.00	21.00
##FFFFFF	4.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D76BF

Deuteranopia (green-blind)

#376ABA

Tritanopia (blue-blind)

#00828D

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #3770bc;
/* rgb */ color: rgb(55, 112, 188);
/* oklch */ color: oklch(54.5% 0.133 256.5);

Tailwind

colors: {
  custom: {
    50: '#7e98d0',
    500: '#3770bc',
    950: '#000000',
  },
}

SCSS

$custom: #3770bc;
$custom-light: #7e98d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3770bc",
  "rgb": {
    "r": 55,
    "g": 112,
    "b": 188
  },
  "hsl": {
    "h": 214.286,
    "s": 54.733,
    "l": 47.647
  },
  "oklch": {
    "l": 0.54499,
    "c": 0.13333,
    "h": 256.5
  },
  "luminance": 0.16031
}

Semantic roles & 50–950 ramp

primary

#3770BC

secondary

#C9AC86

accent

#9E4ADE

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0D14

muted

#7C7E82

Preview Lab

Preview with #3770BC

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

Preview Lab → · Contrast checker → · Palette generator →