#3770D0#3770D0

#3770D0 is a mid, vivid blue. Relative luminance 0.170; OKLCH L 55.8% C 0.160 H 260.2°. Best body text is #FFFFFF at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#3770D0
RGB	rgb(55, 112, 208)
HSL	hsl(218, 62%, 52%)
HSV	hsv(218, 74%, 82%)
CMYK	cmyk(73.6%, 46.2%, 0%, 18.4%)
CIE-LAB	lab(48.20, 14.34, -55.03)
CIE-LCH	lch(48.20, 56.87, 284.61°)
OKLab	oklab(55.8% -0.0273 -0.1578)
OKLCH	oklch(55.8% 0.16 260.2)
XYZ	xyz(18.7508, 16.9526, 61.9462)
Luminance	0.1696 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3770D0 #D09737

analogous

#37BDD0 #3770D0 #4B37D0

triadic

#3770D0 #D03770 #70D037

tetradic

#3770D0 #D037BD #D09737 #37D04B

square

#3770D0 #D037BD #D09737 #37D04B

split-complementary

#3770D0 #D04B37 #BDD037

monochromatic

#1B3B72 #2655A3 #3770D0 #6993DC #9AB7E7

Accessibility & contrast

On white

4.78

#3770D0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.39

#3770D0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3770D0

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3770D0	#FFFFFF	#000000	##FFFFFF
##3770D0	1.00	4.78	4.39	4.78
#FFFFFF	4.78	1.00	21.00	1.00
#000000	4.39	21.00	1.00	21.00
##FFFFFF	4.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D7AD4

Deuteranopia (green-blind)

#196CCE

Tritanopia (blue-blind)

#008796

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3770d0;
/* rgb */ color: rgb(55, 112, 208);
/* oklch */ color: oklch(55.8% 0.160 260.2);

Tailwind

colors: {
  custom: {
    50: '#8298df',
    500: '#3770d0',
    950: '#000000',
  },
}

SCSS

$custom: #3770d0;
$custom-light: #8298df;
$custom-dark: #000000;

JSON

{
  "hex": "#3770d0",
  "rgb": {
    "r": 55,
    "g": 112,
    "b": 208
  },
  "hsl": {
    "h": 217.647,
    "s": 61.943,
    "l": 51.569
  },
  "oklch": {
    "l": 0.558,
    "c": 0.16016,
    "h": 260.2
  },
  "luminance": 0.16955
}

Semantic roles & 50–950 ramp

primary

#3770D0

secondary

#D3BA90

accent

#A943E5

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3770D0

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

Preview Lab → · Contrast checker → · Palette generator →