#3870CC#3870CC

#3870CC is a mid, vivid blue. Relative luminance 0.168; OKLCH L 55.6% C 0.154 H 259.8°. Best body text is #FFFFFF at 4.82:1 contrast (WCAG AA passes).

Color values

HEX	#3870CC
RGB	rgb(56, 112, 204)
HSL	hsl(217, 59%, 51%)
HSV	hsv(217, 73%, 80%)
CMYK	cmyk(72.5%, 45.1%, 0%, 20%)
CIE-LAB	lab(47.99, 13.00, -53.08)
CIE-LCH	lch(47.99, 54.65, 283.77°)
OKLab	oklab(55.57% -0.0273 -0.1521)
OKLCH	oklch(55.57% 0.154 259.8)
XYZ	xyz(18.3202, 16.7867, 59.3897)
Luminance	0.1679 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3870CC #CC9438

analogous

#38BACC #3870CC #4A38CC

triadic

#3870CC #CC3870 #70CC38

tetradic

#3870CC #CC38BA #CC9438 #38CC4A

square

#3870CC #CC38BA #CC9438 #38CC4A

split-complementary

#3870CC #CC4A38 #BACC38

monochromatic

#1C3B6E #29559E #3870CC #6993D8 #99B6E5

Accessibility & contrast

On white

4.82

#3870CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.36

#3870CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3870CC

4.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3870CC	#FFFFFF	#000000	##FFFFFF
##3870CC	1.00	4.82	4.36	4.82
#FFFFFF	4.82	1.00	21.00	1.00
#000000	4.36	21.00	1.00	21.00
##FFFFFF	4.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4179CF

Deuteranopia (green-blind)

#226CCA

Tritanopia (blue-blind)

#008694

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3870cc;
/* rgb */ color: rgb(56, 112, 204);
/* oklch */ color: oklch(55.6% 0.154 259.8);

Tailwind

colors: {
  custom: {
    50: '#8198dc',
    500: '#3870cc',
    950: '#000000',
  },
}

SCSS

$custom: #3870cc;
$custom-light: #8198dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3870cc",
  "rgb": {
    "r": 56,
    "g": 112,
    "b": 204
  },
  "hsl": {
    "h": 217.297,
    "s": 59.2,
    "l": 50.98
  },
  "oklch": {
    "l": 0.55569,
    "c": 0.15449,
    "h": 259.8
  },
  "luminance": 0.16789
}

Semantic roles & 50–950 ramp

primary

#3870CC

secondary

#D1B88F

accent

#A745E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3870CC

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

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