#3870BF#3870BF

#3870BF is a mid, vivid blue. Relative luminance 0.162; OKLCH L 54.7% C 0.137 H 257.4°. Best body text is #FFFFFF at 4.95:1 contrast (WCAG AA passes).

Color values

HEX	#3870BF
RGB	rgb(56, 112, 191)
HSL	hsl(215, 55%, 48%)
HSV	hsv(215, 71%, 75%)
CMYK	cmyk(70.7%, 41.4%, 0%, 25.1%)
CIE-LAB	lab(47.22, 8.24, -46.84)
CIE-LCH	lch(47.22, 47.56, 279.98°)
OKLab	oklab(54.73% -0.0298 -0.1337)
OKLCH	oklch(54.73% 0.137 257.4)
XYZ	xyz(16.8256, 16.1889, 51.5181)
Luminance	0.1619 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3870BF #BF8738

analogous

#38B3BF #3870BF #4338BF

triadic

#3870BF #BF3870 #70BF38

tetradic

#3870BF #BF38B3 #BF8738 #38BF43

square

#3870BF #BF38B3 #BF8738 #38BF43

split-complementary

#3870BF #BF4338 #B3BF38

monochromatic

#1C3860 #2A5490 #3870BF #6391D1 #92B2DF

Accessibility & contrast

On white

4.95

#3870BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.24

#3870BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3870BF

4.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3870BF	#FFFFFF	#000000	##FFFFFF
##3870BF	1.00	4.95	4.24	4.95
#FFFFFF	4.95	1.00	21.00	1.00
#000000	4.24	21.00	1.00	21.00
##FFFFFF	4.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B77C2

Deuteranopia (green-blind)

#356ABD

Tritanopia (blue-blind)

#00828E

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3870bf;
/* rgb */ color: rgb(56, 112, 191);
/* oklch */ color: oklch(54.7% 0.137 257.4);

Tailwind

colors: {
  custom: {
    50: '#7f98d3',
    500: '#3870bf',
    950: '#000000',
  },
}

SCSS

$custom: #3870bf;
$custom-light: #7f98d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3870bf",
  "rgb": {
    "r": 56,
    "g": 112,
    "b": 191
  },
  "hsl": {
    "h": 215.111,
    "s": 54.656,
    "l": 48.431
  },
  "oklch": {
    "l": 0.54726,
    "c": 0.137,
    "h": 257.4
  },
  "luminance": 0.16191
}

Semantic roles & 50–950 ramp

primary

#3870BF

secondary

#CAAF89

accent

#A14ADE

background

#F8F9FD

surface

#EFF2FA

border

#CACCD3

text

#0B0D14

muted

#7C7E83

Preview Lab

Preview with #3870BF

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

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