#3973D3#3973D3

#3973D3 is a mid, vivid blue. Relative luminance 0.178; OKLCH L 56.7% C 0.160 H 259.9°. Best body text is #FFFFFF at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#3973D3
RGB	rgb(57, 115, 211)
HSL	hsl(217, 64%, 53%)
HSV	hsv(217, 73%, 83%)
CMYK	cmyk(73%, 45.5%, 0%, 17.3%)
CIE-LAB	lab(49.29, 13.83, -54.98)
CIE-LCH	lch(49.29, 56.70, 284.11°)
OKLab	oklab(56.72% -0.028 -0.1576)
OKLCH	oklch(56.72% 0.16 259.9)
XYZ	xyz(19.5717, 17.8323, 64.0259)
Luminance	0.1783 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3973D3 #D39939

analogous

#39C0D3 #3973D3 #4C39D3

triadic

#3973D3 #D33973 #73D339

tetradic

#3973D3 #D339C0 #D39939 #39D34C

square

#3973D3 #D339C0 #D39939 #39D34C

split-complementary

#3973D3 #D34C39 #C0D339

monochromatic

#1A3D77 #2657A9 #3973D3 #6B96DE #9DBAE9

Accessibility & contrast

On white

4.60

#3973D3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.57

#3973D3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3973D3

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3973D3	#FFFFFF	#000000	##FFFFFF
##3973D3	1.00	4.60	4.57	4.60
#FFFFFF	4.60	1.00	21.00	1.00
#000000	4.57	21.00	1.00	21.00
##FFFFFF	4.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#417DD7

Deuteranopia (green-blind)

#206FD1

Tritanopia (blue-blind)

#008A99

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3973d3;
/* rgb */ color: rgb(57, 115, 211);
/* oklch */ color: oklch(56.7% 0.160 259.9);

Tailwind

colors: {
  custom: {
    50: '#839ae1',
    500: '#3973d3',
    950: '#000000',
  },
}

SCSS

$custom: #3973d3;
$custom-light: #839ae1;
$custom-dark: #000000;

JSON

{
  "hex": "#3973d3",
  "rgb": {
    "r": 57,
    "g": 115,
    "b": 211
  },
  "hsl": {
    "h": 217.403,
    "s": 63.636,
    "l": 52.549
  },
  "oklch": {
    "l": 0.5672,
    "c": 0.16004,
    "h": 259.9
  },
  "luminance": 0.17834
}

Semantic roles & 50–950 ramp

primary

#3973D3

secondary

#D5BC92

accent

#A841E7

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3973D3

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

Preview Lab → · Contrast checker → · Palette generator →