#3971D2#3971D2

#3971D2 is a mid, vivid blue. Relative luminance 0.173; OKLCH L 56.2% C 0.161 H 260.6°. Best body text is #FFFFFF at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#3971D2
RGB	rgb(57, 113, 210)
HSL	hsl(218, 63%, 52%)
HSV	hsv(218, 73%, 82%)
CMYK	cmyk(72.9%, 46.2%, 0%, 17.6%)
CIE-LAB	lab(48.67, 14.71, -55.41)
CIE-LCH	lch(48.67, 57.33, 284.87°)
OKLab	oklab(56.23% -0.0264 -0.1589)
OKLCH	oklch(56.23% 0.161 260.6)
XYZ	xyz(19.2211, 17.3312, 63.2925)
Luminance	0.1733 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3971D2 #D29A39

analogous

#39BED2 #3971D2 #4D39D2

triadic

#3971D2 #D23971 #71D239

tetradic

#3971D2 #D239BE #D29A39 #39D24D

square

#3971D2 #D239BE #D29A39 #39D24D

split-complementary

#3971D2 #D24D39 #BED239

monochromatic

#1B3C76 #2656A8 #3971D2 #6B95DD #9DB9E9

Accessibility & contrast

On white

4.70

#3971D2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.47

#3971D2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3971D2

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3971D2	#FFFFFF	#000000	##FFFFFF
##3971D2	1.00	4.70	4.47	4.70
#FFFFFF	4.70	1.00	21.00	1.00
#000000	4.47	21.00	1.00	21.00
##FFFFFF	4.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E7BD6

Deuteranopia (green-blind)

#1A6DD0

Tritanopia (blue-blind)

#008897

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3971d2;
/* rgb */ color: rgb(57, 113, 210);
/* oklch */ color: oklch(56.2% 0.161 260.6);

Tailwind

colors: {
  custom: {
    50: '#8399e0',
    500: '#3971d2',
    950: '#000000',
  },
}

SCSS

$custom: #3971d2;
$custom-light: #8399e0;
$custom-dark: #000000;

JSON

{
  "hex": "#3971d2",
  "rgb": {
    "r": 57,
    "g": 113,
    "b": 210
  },
  "hsl": {
    "h": 218.039,
    "s": 62.963,
    "l": 52.353
  },
  "oklch": {
    "l": 0.56225,
    "c": 0.16104,
    "h": 260.6
  },
  "luminance": 0.17333
}

Semantic roles & 50–950 ramp

primary

#3971D2

secondary

#D5BC92

accent

#AA42E6

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3971D2

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

Preview Lab → · Contrast checker → · Palette generator →