#3973D1#3973D1

#3973D1 is a mid, vivid blue. Relative luminance 0.177; OKLCH L 56.6% C 0.157 H 259.6°. Best body text is #FFFFFF at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#3973D1
RGB	rgb(57, 115, 209)
HSL	hsl(217, 62%, 52%)
HSV	hsv(217, 73%, 82%)
CMYK	cmyk(72.7%, 45%, 0%, 18%)
CIE-LAB	lab(49.17, 13.09, -54.04)
CIE-LCH	lch(49.17, 55.60, 283.62°)
OKLab	oklab(56.59% -0.0283 -0.1548)
OKLCH	oklch(56.59% 0.157 259.6)
XYZ	xyz(19.3225, 17.7327, 62.7136)
Luminance	0.1774 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3973D1 #D19739

analogous

#39BFD1 #3973D1 #4B39D1

triadic

#3973D1 #D13973 #73D139

tetradic

#3973D1 #D139BF #D19739 #39D14B

square

#3973D1 #D139BF #D19739 #39D14B

split-complementary

#3973D1 #D14B39 #BFD139

monochromatic

#1B3D75 #2757A6 #3973D1 #6B96DD #9CB9E8

Accessibility & contrast

On white

4.62

#3973D1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.55

#3973D1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3973D1

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3973D1	#FFFFFF	#000000	##FFFFFF
##3973D1	1.00	4.62	4.55	4.62
#FFFFFF	4.62	1.00	21.00	1.00
#000000	4.55	21.00	1.00	21.00
##FFFFFF	4.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#437CD5

Deuteranopia (green-blind)

#246ECF

Tritanopia (blue-blind)

#008998

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3973d1;
/* rgb */ color: rgb(57, 115, 209);
/* oklch */ color: oklch(56.6% 0.157 259.6);

Tailwind

colors: {
  custom: {
    50: '#829ae0',
    500: '#3973d1',
    950: '#000000',
  },
}

SCSS

$custom: #3973d1;
$custom-light: #829ae0;
$custom-dark: #000000;

JSON

{
  "hex": "#3973d1",
  "rgb": {
    "r": 57,
    "g": 115,
    "b": 209
  },
  "hsl": {
    "h": 217.105,
    "s": 62.295,
    "l": 52.157
  },
  "oklch": {
    "l": 0.56587,
    "c": 0.15738,
    "h": 259.6
  },
  "luminance": 0.17735
}

Semantic roles & 50–950 ramp

primary

#3973D1

secondary

#D4BB92

accent

#A742E5

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3973D1

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

Preview Lab → · Contrast checker → · Palette generator →