#3973CE#3973CE

#3973CE is a mid, vivid blue. Relative luminance 0.176; OKLCH L 56.4% C 0.153 H 259.2°. Best body text is #FFFFFF at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#3973CE
RGB	rgb(57, 115, 206)
HSL	hsl(217, 60%, 52%)
HSV	hsv(217, 72%, 81%)
CMYK	cmyk(72.3%, 44.2%, 0%, 19.2%)
CIE-LAB	lab(48.99, 11.99, -52.62)
CIE-LCH	lch(48.99, 53.97, 282.84°)
OKLab	oklab(56.39% -0.0288 -0.1506)
OKLCH	oklch(56.39% 0.153 259.2)
XYZ	xyz(18.9546, 17.5855, 60.7759)
Luminance	0.1759 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3973CE #CE9439

analogous

#39BECE #3973CE #4A39CE

triadic

#3973CE #CE3973 #73CE39

tetradic

#3973CE #CE39BE #CE9439 #39CE4A

square

#3973CE #CE39BE #CE9439 #39CE4A

split-complementary

#3973CE #CE4A39 #BECE39

monochromatic

#1C3D71 #2857A2 #3973CE #6A96DA #9BB8E6

Accessibility & contrast

On white

4.65

#3973CE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.52

#3973CE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3973CE

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3973CE	#FFFFFF	#000000	##FFFFFF
##3973CE	1.00	4.65	4.52	4.65
#FFFFFF	4.65	1.00	21.00	1.00
#000000	4.52	21.00	1.00	21.00
##FFFFFF	4.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#457CD1

Deuteranopia (green-blind)

#296ECC

Tritanopia (blue-blind)

#008896

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3973ce;
/* rgb */ color: rgb(57, 115, 206);
/* oklch */ color: oklch(56.4% 0.153 259.2);

Tailwind

colors: {
  custom: {
    50: '#829add',
    500: '#3973ce',
    950: '#000000',
  },
}

SCSS

$custom: #3973ce;
$custom-light: #829add;
$custom-dark: #000000;

JSON

{
  "hex": "#3973ce",
  "rgb": {
    "r": 57,
    "g": 115,
    "b": 206
  },
  "hsl": {
    "h": 216.644,
    "s": 60.324,
    "l": 51.569
  },
  "oklch": {
    "l": 0.56389,
    "c": 0.15337,
    "h": 259.2
  },
  "luminance": 0.17588
}

Semantic roles & 50–950 ramp

primary

#3973CE

secondary

#D2B991

accent

#A644E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3973CE

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

Preview Lab → · Contrast checker → · Palette generator →