#3970C8#3970C8

#3970C8 is a mid, vivid blue. Relative luminance 0.166; OKLCH L 55.3% C 0.149 H 259.4°. Best body text is #FFFFFF at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#3970C8
RGB	rgb(57, 112, 200)
HSL	hsl(217, 57%, 50%)
HSV	hsv(217, 72%, 78%)
CMYK	cmyk(71.5%, 44%, 0%, 21.6%)
CIE-LAB	lab(47.79, 11.68, -51.12)
CIE-LCH	lch(47.79, 52.43, 282.87°)
OKLab	oklab(55.34% -0.0273 -0.1463)
OKLCH	oklch(55.34% 0.149 259.4)
XYZ	xyz(17.9031, 16.6264, 56.8981)
Luminance	0.1663 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3970C8 #C89139

analogous

#39B8C8 #3970C8 #4939C8

triadic

#3970C8 #C83970 #70C839

tetradic

#3970C8 #C839B8 #C89139 #39C849

square

#3970C8 #C839B8 #C89139 #39C849

split-complementary

#3970C8 #C84939 #B8C839

monochromatic

#1D3B69 #2B5599 #3970C8 #6993D5 #99B5E3

Accessibility & contrast

On white

4.85

#3970C8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.33

#3970C8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3970C8

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3970C8	#FFFFFF	#000000	##FFFFFF
##3970C8	1.00	4.85	4.33	4.85
#FFFFFF	4.85	1.00	21.00	1.00
#000000	4.33	21.00	1.00	21.00
##FFFFFF	4.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4478CB

Deuteranopia (green-blind)

#2A6BC6

Tritanopia (blue-blind)

#008592

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3970c8;
/* rgb */ color: rgb(57, 112, 200);
/* oklch */ color: oklch(55.3% 0.149 259.4);

Tailwind

colors: {
  custom: {
    50: '#8198d9',
    500: '#3970c8',
    950: '#000000',
  },
}

SCSS

$custom: #3970c8;
$custom-light: #8198d9;
$custom-dark: #000000;

JSON

{
  "hex": "#3970c8",
  "rgb": {
    "r": 57,
    "g": 112,
    "b": 200
  },
  "hsl": {
    "h": 216.923,
    "s": 56.522,
    "l": 50.392
  },
  "oklch": {
    "l": 0.55344,
    "c": 0.14878,
    "h": 259.4
  },
  "luminance": 0.16628
}

Semantic roles & 50–950 ramp

primary

#3970C8

secondary

#CEB68F

accent

#A548E0

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3970C8

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

Preview Lab → · Contrast checker → · Palette generator →