#3970C4#3970C4

#3970C4 is a mid, vivid blue. Relative luminance 0.164; OKLCH L 55.1% C 0.143 H 258.7°. Best body text is #FFFFFF at 4.90:1 contrast (WCAG AA passes).

Color values

HEX	#3970C4
RGB	rgb(57, 112, 196)
HSL	hsl(216, 55%, 50%)
HSV	hsv(216, 71%, 77%)
CMYK	cmyk(70.9%, 42.9%, 0%, 23.1%)
CIE-LAB	lab(47.55, 10.21, -49.20)
CIE-LCH	lch(47.55, 50.25, 281.73°)
OKLab	oklab(55.08% -0.028 -0.1406)
OKLCH	oklch(55.08% 0.143 258.7)
XYZ	xyz(17.4417, 16.4419, 54.4682)
Luminance	0.1644 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3970C4 #C48D39

analogous

#39B6C4 #3970C4 #4739C4

triadic

#3970C4 #C43970 #70C439

tetradic

#3970C4 #C439B6 #C48D39 #39C447

square

#3970C4 #C439B6 #C48D39 #39C447

split-complementary

#3970C4 #C44739 #B6C439

monochromatic

#1D3A65 #2B5595 #3970C4 #6792D3 #97B4E1

Accessibility & contrast

On white

4.90

#3970C4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.29

#3970C4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3970C4

4.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3970C4	#FFFFFF	#000000	##FFFFFF
##3970C4	1.00	4.90	4.29	4.90
#FFFFFF	4.90	1.00	21.00	1.00
#000000	4.29	21.00	1.00	21.00
##FFFFFF	4.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4778C7

Deuteranopia (green-blind)

#2F6BC2

Tritanopia (blue-blind)

#008490

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3970c4;
/* rgb */ color: rgb(57, 112, 196);
/* oklch */ color: oklch(55.1% 0.143 258.7);

Tailwind

colors: {
  custom: {
    50: '#8098d6',
    500: '#3970c4',
    950: '#000000',
  },
}

SCSS

$custom: #3970c4;
$custom-light: #8098d6;
$custom-dark: #000000;

JSON

{
  "hex": "#3970c4",
  "rgb": {
    "r": 57,
    "g": 112,
    "b": 196
  },
  "hsl": {
    "h": 216.259,
    "s": 54.941,
    "l": 49.608
  },
  "oklch": {
    "l": 0.55084,
    "c": 0.1434,
    "h": 258.7
  },
  "luminance": 0.16444
}

Semantic roles & 50–950 ramp

primary

#3970C4

secondary

#CCB38D

accent

#A34ADE

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0B0D14

muted

#7C7E83

Preview Lab

Preview with #3970C4

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

Preview Lab → · Contrast checker → · Palette generator →