#3973CA#3973CA

#3973CA is a mid, vivid blue. Relative luminance 0.174; OKLCH L 56.1% C 0.148 H 258.5°. Best body text is #FFFFFF at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#3973CA
RGB	rgb(57, 115, 202)
HSL	hsl(216, 58%, 51%)
HSV	hsv(216, 72%, 79%)
CMYK	cmyk(71.8%, 43.1%, 0%, 20.8%)
CIE-LAB	lab(48.75, 10.53, -50.72)
CIE-LCH	lch(48.75, 51.80, 281.73°)
OKLab	oklab(56.13% -0.0296 -0.145)
OKLCH	oklch(56.13% 0.148 258.5)
XYZ	xyz(18.4749, 17.3936, 58.2493)
Luminance	0.1740 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3973CA #CA9039

analogous

#39BBCA #3973CA #4739CA

triadic

#3973CA #CA3973 #73CA39

tetradic

#3973CA #CA39BB #CA9039 #39CA47

square

#3973CA #CA39BB #CA9039 #39CA47

split-complementary

#3973CA #CA4739 #BBCA39

monochromatic

#1D3C6C #2A579C #3973CA #6995D7 #9AB7E4

Accessibility & contrast

On white

4.69

#3973CA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.48

#3973CA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3973CA

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3973CA	#FFFFFF	#000000	##FFFFFF
##3973CA	1.00	4.69	4.48	4.69
#FFFFFF	4.69	1.00	21.00	1.00
#000000	4.48	21.00	1.00	21.00
##FFFFFF	4.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#487BCD

Deuteranopia (green-blind)

#2F6EC8

Tritanopia (blue-blind)

#008794

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3973ca;
/* rgb */ color: rgb(57, 115, 202);
/* oklch */ color: oklch(56.1% 0.148 258.5);

Tailwind

colors: {
  custom: {
    50: '#819adb',
    500: '#3973ca',
    950: '#000000',
  },
}

SCSS

$custom: #3973ca;
$custom-light: #819adb;
$custom-dark: #000000;

JSON

{
  "hex": "#3973ca",
  "rgb": {
    "r": 57,
    "g": 115,
    "b": 202
  },
  "hsl": {
    "h": 216,
    "s": 57.769,
    "l": 50.784
  },
  "oklch": {
    "l": 0.56129,
    "c": 0.14802,
    "h": 258.5
  },
  "luminance": 0.17396
}

Semantic roles & 50–950 ramp

primary

#3973CA

secondary

#D0B68F

accent

#A347E1

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3973CA

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

Preview Lab → · Contrast checker → · Palette generator →