#3973D7#3973D7

#3973D7 is a mid, vivid blue. Relative luminance 0.180; OKLCH L 57.0% C 0.165 H 260.5°. Best body text is #000000 at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#3973D7
RGB	rgb(57, 115, 215)
HSL	hsl(218, 66%, 53%)
HSV	hsv(218, 73%, 84%)
CMYK	cmyk(73.5%, 46.5%, 0%, 15.7%)
CIE-LAB	lab(49.54, 15.29, -56.86)
CIE-LCH	lch(49.54, 58.88, 285.05°)
OKLab	oklab(56.99% -0.0273 -0.1631)
OKLCH	oklch(56.99% 0.165 260.5)
XYZ	xyz(20.0794, 18.0354, 66.6997)
Luminance	0.1804 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3973D7 #D79D39

analogous

#39C2D7 #3973D7 #4E39D7

triadic

#3973D7 #D73973 #73D739

tetradic

#3973D7 #D739C2 #D79D39 #39D74E

square

#3973D7 #D739C2 #D79D39 #39D74E

split-complementary

#3973D7 #D74E39 #C2D739

monochromatic

#193E7C #2357AF #3973D7 #6C97E1 #9FBBEC

Accessibility & contrast

On white

4.56

#3973D7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.61

#3973D7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3973D7

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3973D7	#FFFFFF	#000000	##000000
##3973D7	1.00	4.56	4.61	4.61
#FFFFFF	4.56	1.00	21.00	21.00
#000000	4.61	21.00	1.00	1.00
##000000	4.61	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E7EDB

Deuteranopia (green-blind)

#156FD5

Tritanopia (blue-blind)

#008B9A

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3973d7;
/* rgb */ color: rgb(57, 115, 215);
/* oklch */ color: oklch(57.0% 0.165 260.5);

Tailwind

colors: {
  custom: {
    50: '#849ae4',
    500: '#3973d7',
    950: '#000000',
  },
}

SCSS

$custom: #3973d7;
$custom-light: #849ae4;
$custom-dark: #000000;

JSON

{
  "hex": "#3973d7",
  "rgb": {
    "r": 57,
    "g": 115,
    "b": 215
  },
  "hsl": {
    "h": 217.975,
    "s": 66.387,
    "l": 53.333
  },
  "oklch": {
    "l": 0.56989,
    "c": 0.16537,
    "h": 260.5
  },
  "luminance": 0.18038
}

Semantic roles & 50–950 ramp

primary

#3973D7

secondary

#D8BF94

accent

#AB3EE9

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #3973D7

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

Preview Lab → · Contrast checker → · Palette generator →