#3972C9#3972C9

#3972C9 is a mid, vivid blue. Relative luminance 0.171; OKLCH L 55.8% C 0.148 H 258.7°. Best body text is #FFFFFF at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#3972C9
RGB	rgb(57, 114, 201)
HSL	hsl(216, 57%, 51%)
HSV	hsv(216, 72%, 79%)
CMYK	cmyk(71.6%, 43.3%, 0%, 21.2%)
CIE-LAB	lab(48.41, 10.79, -50.69)
CIE-LCH	lch(48.41, 51.83, 282.02°)
OKLab	oklab(55.85% -0.0289 -0.145)
OKLCH	oklch(55.85% 0.148 258.7)
XYZ	xyz(18.2435, 17.1196, 57.5900)
Luminance	0.1712 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3972C9 #C99039

analogous

#39BAC9 #3972C9 #4839C9

triadic

#3972C9 #C93972 #72C939

tetradic

#3972C9 #C939BA #C99039 #39C948

square

#3972C9 #C939BA #C99039 #39C948

split-complementary

#3972C9 #C94839 #BAC939

monochromatic

#1D3C6B #2A579B #3972C9 #6994D6 #99B6E3

Accessibility & contrast

On white

4.75

#3972C9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.42

#3972C9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3972C9

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3972C9	#FFFFFF	#000000	##FFFFFF
##3972C9	1.00	4.75	4.42	4.75
#FFFFFF	4.75	1.00	21.00	1.00
#000000	4.42	21.00	1.00	21.00
##FFFFFF	4.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#477ACC

Deuteranopia (green-blind)

#2D6DC7

Tritanopia (blue-blind)

#008694

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3972c9;
/* rgb */ color: rgb(57, 114, 201);
/* oklch */ color: oklch(55.8% 0.148 258.7);

Tailwind

colors: {
  custom: {
    50: '#819ada',
    500: '#3972c9',
    950: '#000000',
  },
}

SCSS

$custom: #3972c9;
$custom-light: #819ada;
$custom-dark: #000000;

JSON

{
  "hex": "#3972c9",
  "rgb": {
    "r": 57,
    "g": 114,
    "b": 201
  },
  "hsl": {
    "h": 216.25,
    "s": 57.143,
    "l": 50.588
  },
  "oklch": {
    "l": 0.55846,
    "c": 0.14783,
    "h": 258.7
  },
  "luminance": 0.17122
}

Semantic roles & 50–950 ramp

primary

#3972C9

secondary

#CFB68F

accent

#A447E0

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3972C9

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

Preview Lab → · Contrast checker → · Palette generator →