#3770D7#3770D7

#3770D7 is a mid, vivid blue. Relative luminance 0.173; OKLCH L 56.3% C 0.169 H 261.1°. Best body text is #FFFFFF at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#3770D7
RGB	rgb(55, 112, 215)
HSL	hsl(219, 67%, 53%)
HSV	hsv(219, 74%, 84%)
CMYK	cmyk(74.4%, 47.9%, 0%, 15.7%)
CIE-LAB	lab(48.64, 16.93, -58.31)
CIE-LCH	lch(48.64, 60.71, 286.19°)
OKLab	oklab(56.28% -0.0262 -0.1674)
OKLCH	oklch(56.28% 0.169 261.1)
XYZ	xyz(19.6310, 17.3047, 66.5823)
Luminance	0.1731 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3770D7 #D79E37

analogous

#37C0D7 #3770D7 #4E37D7

triadic

#3770D7 #D73770 #70D737

tetradic

#3770D7 #D737C0 #D79E37 #37D74E

square

#3770D7 #D737C0 #D79E37 #37D74E

split-complementary

#3770D7 #D74E37 #C0D737

monochromatic

#193C7B #2354AE #3770D7 #6A94E1 #9DB9EB

Accessibility & contrast

On white

4.71

#3770D7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.46

#3770D7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3770D7

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3770D7	#FFFFFF	#000000	##FFFFFF
##3770D7	1.00	4.71	4.46	4.71
#FFFFFF	4.71	1.00	21.00	1.00
#000000	4.46	21.00	1.00	21.00
##FFFFFF	4.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#367BDB

Deuteranopia (green-blind)

#006DD5

Tritanopia (blue-blind)

#008899

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3770d7;
/* rgb */ color: rgb(55, 112, 215);
/* oklch */ color: oklch(56.3% 0.169 261.1);

Tailwind

colors: {
  custom: {
    50: '#8398e4',
    500: '#3770d7',
    950: '#000000',
  },
}

SCSS

$custom: #3770d7;
$custom-light: #8398e4;
$custom-dark: #000000;

JSON

{
  "hex": "#3770d7",
  "rgb": {
    "r": 55,
    "g": 112,
    "b": 215
  },
  "hsl": {
    "h": 218.625,
    "s": 66.667,
    "l": 52.941
  },
  "oklch": {
    "l": 0.56281,
    "c": 0.16948,
    "h": 261.1
  },
  "luminance": 0.17307
}

Semantic roles & 50–950 ramp

primary

#3770D7

secondary

#D7BF92

accent

#AD3EEA

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0D16

muted

#7D7E84

Preview Lab

Preview with #3770D7

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

Preview Lab → · Contrast checker → · Palette generator →