#3973D9#3973D9

#3973D9 is a mid, vivid blue. Relative luminance 0.181; OKLCH L 57.1% C 0.168 H 260.8°. Best body text is #000000 at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#3973D9
RGB	rgb(57, 115, 217)
HSL	hsl(218, 68%, 54%)
HSV	hsv(218, 74%, 85%)
CMYK	cmyk(73.7%, 47%, 0%, 14.9%)
CIE-LAB	lab(49.66, 16.03, -57.79)
CIE-LCH	lch(49.66, 59.97, 285.50°)
OKLab	oklab(57.13% -0.027 -0.1658)
OKLCH	oklch(57.13% 0.168 260.8)
XYZ	xyz(20.3379, 18.1388, 68.0615)
Luminance	0.1814 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3973D9 #D99F39

analogous

#39C3D9 #3973D9 #4F39D9

triadic

#3973D9 #D93973 #73D939

tetradic

#3973D9 #D939C3 #D99F39 #39D94F

square

#3973D9 #D939C3 #D99F39 #39D94F

split-complementary

#3973D9 #D94F39 #C3D939

monochromatic

#183E7F #2257B3 #3973D9 #6C97E3 #A0BCED

Accessibility & contrast

On white

4.54

#3973D9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.63

#3973D9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3973D9

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3973D9	#FFFFFF	#000000	##000000
##3973D9	1.00	4.54	4.63	4.63
#FFFFFF	4.54	1.00	21.00	21.00
#000000	4.63	21.00	1.00	1.00
##000000	4.63	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C7EDD

Deuteranopia (green-blind)

#0E6FD7

Tritanopia (blue-blind)

#008B9B

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3973d9;
/* rgb */ color: rgb(57, 115, 217);
/* oklch */ color: oklch(57.1% 0.168 260.8);

Tailwind

colors: {
  custom: {
    50: '#849ae5',
    500: '#3973d9',
    950: '#000000',
  },
}

SCSS

$custom: #3973d9;
$custom-light: #849ae5;
$custom-dark: #000000;

JSON

{
  "hex": "#3973d9",
  "rgb": {
    "r": 57,
    "g": 115,
    "b": 217
  },
  "hsl": {
    "h": 218.25,
    "s": 67.797,
    "l": 53.725
  },
  "oklch": {
    "l": 0.57126,
    "c": 0.16802,
    "h": 260.8
  },
  "luminance": 0.18141
}

Semantic roles & 50–950 ramp

primary

#3973D9

secondary

#D9C095

accent

#AC3DEB

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #3973D9

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

Preview Lab → · Contrast checker → · Palette generator →