#3870C4#3870C4

#3870C4 is a mid, vivid blue. Relative luminance 0.164; OKLCH L 55.0% C 0.144 H 258.4°. Best body text is #FFFFFF at 4.90:1 contrast (WCAG AA passes).

Color values

HEX	#3870C4
RGB	rgb(56, 112, 196)
HSL	hsl(216, 56%, 49%)
HSV	hsv(216, 71%, 77%)
CMYK	cmyk(71.4%, 42.9%, 0%, 23.1%)
CIE-LAB	lab(47.51, 10.07, -49.26)
CIE-LCH	lch(47.51, 50.28, 281.55°)
OKLab	oklab(55.05% -0.0288 -0.1408)
OKLCH	oklch(55.05% 0.144 258.4)
XYZ	xyz(17.3852, 16.4127, 54.4656)
Luminance	0.1641 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3870C4 #C48C38

analogous

#38B6C4 #3870C4 #4638C4

triadic

#3870C4 #C43870 #70C438

tetradic

#3870C4 #C438B6 #C48C38 #38C446

square

#3870C4 #C438B6 #C48C38 #38C446

split-complementary

#3870C4 #C44638 #B6C438

monochromatic

#1D3A65 #2A5594 #3870C4 #6692D3 #96B4E1

Accessibility & contrast

On white

4.90

#3870C4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.28

#3870C4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3870C4

4.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3870C4	#FFFFFF	#000000	##FFFFFF
##3870C4	1.00	4.90	4.28	4.90
#FFFFFF	4.90	1.00	21.00	1.00
#000000	4.28	21.00	1.00	21.00
##FFFFFF	4.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4778C7

Deuteranopia (green-blind)

#2F6BC2

Tritanopia (blue-blind)

#008490

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3870c4;
/* rgb */ color: rgb(56, 112, 196);
/* oklch */ color: oklch(55.0% 0.144 258.4);

Tailwind

colors: {
  custom: {
    50: '#8098d6',
    500: '#3870c4',
    950: '#000000',
  },
}

SCSS

$custom: #3870c4;
$custom-light: #8098d6;
$custom-dark: #000000;

JSON

{
  "hex": "#3870c4",
  "rgb": {
    "r": 56,
    "g": 112,
    "b": 196
  },
  "hsl": {
    "h": 216,
    "s": 55.556,
    "l": 49.412
  },
  "oklch": {
    "l": 0.55045,
    "c": 0.14373,
    "h": 258.4
  },
  "luminance": 0.16415
}

Semantic roles & 50–950 ramp

primary

#3870C4

secondary

#CCB28C

accent

#A349DF

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0B0D14

muted

#7C7E83

Preview Lab

Preview with #3870C4

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

Preview Lab → · Contrast checker → · Palette generator →