#3970BB#3970BB

#3970BB is a mid, vivid cyan. Relative luminance 0.160; OKLCH L 54.5% C 0.131 H 256.8°. Best body text is #FFFFFF at 4.99:1 contrast (WCAG AA passes).

Color values

HEX	#3970BB
RGB	rgb(57, 112, 187)
HSL	hsl(215, 53%, 48%)
HSV	hsv(215, 70%, 73%)
CMYK	cmyk(69.5%, 40.1%, 0%, 26.7%)
CIE-LAB	lab(47.03, 6.94, -44.83)
CIE-LCH	lch(47.03, 45.37, 278.80°)
OKLab	oklab(54.52% -0.03 -0.1278)
OKLCH	oklch(54.52% 0.131 256.8)
XYZ	xyz(16.4479, 16.0443, 49.2341)
Luminance	0.1605 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3970BB #BB8439

analogous

#39B1BB #3970BB #4339BB

triadic

#3970BB #BB3970 #70BB39

tetradic

#3970BB #BB39B1 #BB8439 #39BB43

square

#3970BB #BB39B1 #BB8439 #39BB43

split-complementary

#3970BB #BB4339 #B1BB39

monochromatic

#1C385D #2B548C #3970BB #6290CF #91B1DD

Accessibility & contrast

On white

4.99

#3970BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.21

#3970BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3970BB

4.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3970BB	#FFFFFF	#000000	##FFFFFF
##3970BB	1.00	4.99	4.21	4.99
#FFFFFF	4.99	1.00	21.00	1.00
#000000	4.21	21.00	1.00	21.00
##FFFFFF	4.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D76BE

Deuteranopia (green-blind)

#396AB9

Tritanopia (blue-blind)

#00818C

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #3970bb;
/* rgb */ color: rgb(57, 112, 187);
/* oklch */ color: oklch(54.5% 0.131 256.8);

Tailwind

colors: {
  custom: {
    50: '#7e98d0',
    500: '#3970bb',
    950: '#000000',
  },
}

SCSS

$custom: #3970bb;
$custom-light: #7e98d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3970bb",
  "rgb": {
    "r": 57,
    "g": 112,
    "b": 187
  },
  "hsl": {
    "h": 214.615,
    "s": 53.279,
    "l": 47.843
  },
  "oklch": {
    "l": 0.54516,
    "c": 0.13126,
    "h": 256.8
  },
  "luminance": 0.16046
}

Semantic roles & 50–950 ramp

primary

#3970BB

secondary

#C8AD87

accent

#9F4BDD

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0D14

muted

#7C7E82

Preview Lab

Preview with #3970BB

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

Preview Lab → · Contrast checker → · Palette generator →