#3870C5#3870C5

#3870C5 is a mid, vivid blue. Relative luminance 0.165; OKLCH L 55.1% C 0.145 H 258.6°. Best body text is #FFFFFF at 4.89:1 contrast (WCAG AA passes).

Color values

HEX	#3870C5
RGB	rgb(56, 112, 197)
HSL	hsl(216, 56%, 50%)
HSV	hsv(216, 72%, 77%)
CMYK	cmyk(71.6%, 43.1%, 0%, 22.7%)
CIE-LAB	lab(47.57, 10.44, -49.74)
CIE-LCH	lch(47.57, 50.82, 281.85°)
OKLab	oklab(55.11% -0.0286 -0.1422)
OKLCH	oklch(55.11% 0.145 258.6)
XYZ	xyz(17.4994, 16.4584, 55.0670)
Luminance	0.1646 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3870C5 #C58D38

analogous

#38B7C5 #3870C5 #4638C5

triadic

#3870C5 #C53870 #70C538

tetradic

#3870C5 #C538B7 #C58D38 #38C546

square

#3870C5 #C538B7 #C58D38 #38C546

split-complementary

#3870C5 #C54638 #B7C538

monochromatic

#1D3A66 #2A5595 #3870C5 #6792D4 #96B4E1

Accessibility & contrast

On white

4.89

#3870C5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.29

#3870C5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3870C5

4.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3870C5	#FFFFFF	#000000	##FFFFFF
##3870C5	1.00	4.89	4.29	4.89
#FFFFFF	4.89	1.00	21.00	1.00
#000000	4.29	21.00	1.00	21.00
##FFFFFF	4.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4778C8

Deuteranopia (green-blind)

#2D6BC3

Tritanopia (blue-blind)

#008491

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3870c5;
/* rgb */ color: rgb(56, 112, 197);
/* oklch */ color: oklch(55.1% 0.145 258.6);

Tailwind

colors: {
  custom: {
    50: '#8098d7',
    500: '#3870c5',
    950: '#000000',
  },
}

SCSS

$custom: #3870c5;
$custom-light: #8098d7;
$custom-dark: #000000;

JSON

{
  "hex": "#3870c5",
  "rgb": {
    "r": 56,
    "g": 112,
    "b": 197
  },
  "hsl": {
    "h": 216.17,
    "s": 55.731,
    "l": 49.608
  },
  "oklch": {
    "l": 0.55109,
    "c": 0.14508,
    "h": 258.6
  },
  "luminance": 0.1646
}

Semantic roles & 50–950 ramp

primary

#3870C5

secondary

#CDB38C

accent

#A349DF

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0B0D14

muted

#7C7E83

Preview Lab

Preview with #3870C5

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

Preview Lab → · Contrast checker → · Palette generator →