#3970D7#3970D7

#3970D7 is a mid, vivid blue. Relative luminance 0.174; OKLCH L 56.4% C 0.169 H 261.6°. Best body text is #FFFFFF at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#3970D7
RGB	rgb(57, 112, 215)
HSL	hsl(219, 66%, 53%)
HSV	hsv(219, 73%, 84%)
CMYK	cmyk(73.5%, 47.9%, 0%, 15.7%)
CIE-LAB	lab(48.71, 17.18, -58.19)
CIE-LCH	lch(48.71, 60.67, 286.45°)
OKLab	oklab(56.36% -0.0248 -0.1671)
OKLCH	oklch(56.36% 0.169 261.6)
XYZ	xyz(19.7429, 17.3623, 66.5876)
Luminance	0.1736 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3970D7 #D7A039

analogous

#39BFD7 #3970D7 #5139D7

triadic

#3970D7 #D73970 #70D739

tetradic

#3970D7 #D739BF #D7A039 #39D751

square

#3970D7 #D739BF #D7A039 #39D751

split-complementary

#3970D7 #D75139 #BFD739

monochromatic

#193C7C #2354AF #3970D7 #6C95E1 #9FBAEC

Accessibility & contrast

On white

4.70

#3970D7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.47

#3970D7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3970D7

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3970D7	#FFFFFF	#000000	##FFFFFF
##3970D7	1.00	4.70	4.47	4.70
#FFFFFF	4.70	1.00	21.00	1.00
#000000	4.47	21.00	1.00	21.00
##FFFFFF	4.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#377BDB

Deuteranopia (green-blind)

#006DD5

Tritanopia (blue-blind)

#008899

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3970d7;
/* rgb */ color: rgb(57, 112, 215);
/* oklch */ color: oklch(56.4% 0.169 261.6);

Tailwind

colors: {
  custom: {
    50: '#8498e4',
    500: '#3970d7',
    950: '#000000',
  },
}

SCSS

$custom: #3970d7;
$custom-light: #8498e4;
$custom-dark: #000000;

JSON

{
  "hex": "#3970d7",
  "rgb": {
    "r": 57,
    "g": 112,
    "b": 215
  },
  "hsl": {
    "h": 219.114,
    "s": 66.387,
    "l": 53.333
  },
  "oklch": {
    "l": 0.56356,
    "c": 0.16889,
    "h": 261.6
  },
  "luminance": 0.17364
}

Semantic roles & 50–950 ramp

primary

#3970D7

secondary

#D8C094

accent

#AE3EE9

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0D16

muted

#7D7E84

Preview Lab

Preview with #3970D7

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

Preview Lab → · Contrast checker → · Palette generator →