#3770DA#3770DA

#3770DA is a mid, vivid blue. Relative luminance 0.175; OKLCH L 56.5% C 0.173 H 261.4°. Best body text is #FFFFFF at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#3770DA
RGB	rgb(55, 112, 218)
HSL	hsl(219, 69%, 54%)
HSV	hsv(219, 75%, 85%)
CMYK	cmyk(74.8%, 48.6%, 0%, 14.5%)
CIE-LAB	lab(48.83, 18.03, -59.70)
CIE-LCH	lch(48.83, 62.36, 286.81°)
OKLab	oklab(56.49% -0.0258 -0.1715)
OKLCH	oklch(56.49% 0.173 261.4)
XYZ	xyz(20.0201, 17.4603, 68.6311)
Luminance	0.1746 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3770DA #DAA137

analogous

#37C2DA #3770DA #4F37DA

triadic

#3770DA #DA3770 #70DA37

tetradic

#3770DA #DA37C2 #DAA137 #37DA4F

square

#3770DA #DA37C2 #DAA137 #37DA4F

split-complementary

#3770DA #DA4F37 #C2DA37

monochromatic

#183C7F #2154B3 #3770DA #6B95E4 #9EBAED

Accessibility & contrast

On white

4.67

#3770DA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.49

#3770DA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3770DA

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3770DA	#FFFFFF	#000000	##FFFFFF
##3770DA	1.00	4.67	4.49	4.67
#FFFFFF	4.67	1.00	21.00	1.00
#000000	4.49	21.00	1.00	21.00
##FFFFFF	4.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#337CDE

Deuteranopia (green-blind)

#006DD8

Tritanopia (blue-blind)

#00899A

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3770da;
/* rgb */ color: rgb(55, 112, 218);
/* oklch */ color: oklch(56.5% 0.173 261.4);

Tailwind

colors: {
  custom: {
    50: '#8498e6',
    500: '#3770da',
    950: '#000000',
  },
}

SCSS

$custom: #3770da;
$custom-light: #8498e6;
$custom-dark: #000000;

JSON

{
  "hex": "#3770da",
  "rgb": {
    "r": 55,
    "g": 112,
    "b": 218
  },
  "hsl": {
    "h": 219.018,
    "s": 68.776,
    "l": 53.529
  },
  "oklch": {
    "l": 0.56491,
    "c": 0.17346,
    "h": 261.4
  },
  "luminance": 0.17463
}

Semantic roles & 50–950 ramp

primary

#3770DA

secondary

#D9C193

accent

#AE3CEC

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0D16

muted

#7D7E84

Preview Lab

Preview with #3770DA

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

Preview Lab → · Contrast checker → · Palette generator →