#3870D9#3870D9

#3870D9 is a mid, vivid blue. Relative luminance 0.174; OKLCH L 56.5% C 0.172 H 261.6°. Best body text is #FFFFFF at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#3870D9
RGB	rgb(56, 112, 217)
HSL	hsl(219, 68%, 54%)
HSV	hsv(219, 74%, 85%)
CMYK	cmyk(74.2%, 48.4%, 0%, 14.9%)
CIE-LAB	lab(48.81, 17.79, -59.18)
CIE-LCH	lch(48.81, 61.79, 286.73°)
OKLab	oklab(56.46% -0.0252 -0.17)
OKLCH	oklch(56.46% 0.172 261.6)
XYZ	xyz(19.9449, 17.4366, 67.9466)
Luminance	0.1744 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3870D9 #D9A138

analogous

#38C1D9 #3870D9 #5038D9

triadic

#3870D9 #D93870 #70D938

tetradic

#3870D9 #D938C1 #D9A138 #38D950

square

#3870D9 #D938C1 #D9A138 #38D950

split-complementary

#3870D9 #D95038 #C1D938

monochromatic

#183C7E #2254B2 #3870D9 #6B95E3 #9FBAED

Accessibility & contrast

On white

4.68

#3870D9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.49

#3870D9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3870D9

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3870D9	#FFFFFF	#000000	##FFFFFF
##3870D9	1.00	4.68	4.49	4.68
#FFFFFF	4.68	1.00	21.00	1.00
#000000	4.49	21.00	1.00	21.00
##FFFFFF	4.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#347CDD

Deuteranopia (green-blind)

#006DD7

Tritanopia (blue-blind)

#00899A

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3870d9;
/* rgb */ color: rgb(56, 112, 217);
/* oklch */ color: oklch(56.5% 0.172 261.6);

Tailwind

colors: {
  custom: {
    50: '#8498e5',
    500: '#3870d9',
    950: '#000000',
  },
}

SCSS

$custom: #3870d9;
$custom-light: #8498e5;
$custom-dark: #000000;

JSON

{
  "hex": "#3870d9",
  "rgb": {
    "r": 56,
    "g": 112,
    "b": 217
  },
  "hsl": {
    "h": 219.13,
    "s": 67.932,
    "l": 53.529
  },
  "oklch": {
    "l": 0.56457,
    "c": 0.17184,
    "h": 261.6
  },
  "luminance": 0.17439
}

Semantic roles & 50–950 ramp

primary

#3870D9

secondary

#D9C194

accent

#AE3DEB

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0D16

muted

#7D7E84

Preview Lab

Preview with #3870D9

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

Preview Lab → · Contrast checker → · Palette generator →