#3970CA#3970CA

#3970CA is a mid, vivid blue. Relative luminance 0.167; OKLCH L 55.5% C 0.151 H 259.8°. Best body text is #FFFFFF at 4.83:1 contrast (WCAG AA passes).

Color values

HEX	#3970CA
RGB	rgb(57, 112, 202)
HSL	hsl(217, 58%, 51%)
HSV	hsv(217, 72%, 79%)
CMYK	cmyk(71.8%, 44.6%, 0%, 20.8%)
CIE-LAB	lab(47.91, 12.41, -52.07)
CIE-LCH	lch(47.91, 53.53, 283.40°)
OKLab	oklab(55.47% -0.0269 -0.1491)
OKLCH	oklch(55.47% 0.151 259.8)
XYZ	xyz(18.1383, 16.7205, 58.1371)
Luminance	0.1672 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3970CA #CA9339

analogous

#39B9CA #3970CA #4A39CA

triadic

#3970CA #CA3970 #70CA39

tetradic

#3970CA #CA39B9 #CA9339 #39CA4A

square

#3970CA #CA39B9 #CA9339 #39CA4A

split-complementary

#3970CA #CA4A39 #B9CA39

monochromatic

#1D3B6C #2A559C #3970CA #6993D7 #9AB6E4

Accessibility & contrast

On white

4.83

#3970CA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.34

#3970CA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3970CA

4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3970CA	#FFFFFF	#000000	##FFFFFF
##3970CA	1.00	4.83	4.34	4.83
#FFFFFF	4.83	1.00	21.00	1.00
#000000	4.34	21.00	1.00	21.00
##FFFFFF	4.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4379CD

Deuteranopia (green-blind)

#276BC8

Tritanopia (blue-blind)

#008593

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3970ca;
/* rgb */ color: rgb(57, 112, 202);
/* oklch */ color: oklch(55.5% 0.151 259.8);

Tailwind

colors: {
  custom: {
    50: '#8198db',
    500: '#3970ca',
    950: '#000000',
  },
}

SCSS

$custom: #3970ca;
$custom-light: #8198db;
$custom-dark: #000000;

JSON

{
  "hex": "#3970ca",
  "rgb": {
    "r": 57,
    "g": 112,
    "b": 202
  },
  "hsl": {
    "h": 217.241,
    "s": 57.769,
    "l": 50.784
  },
  "oklch": {
    "l": 0.55475,
    "c": 0.15148,
    "h": 259.8
  },
  "luminance": 0.16722
}

Semantic roles & 50–950 ramp

primary

#3970CA

secondary

#D0B78F

accent

#A747E1

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3970CA

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

Preview Lab → · Contrast checker → · Palette generator →