#3977D3#3977D3

#3977D3 is a mid, vivid blue. Relative luminance 0.188; OKLCH L 57.6% C 0.155 H 258.3°. Best body text is #000000 at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#3977D3
RGB	rgb(57, 119, 211)
HSL	hsl(216, 64%, 53%)
HSV	hsv(216, 73%, 83%)
CMYK	cmyk(73%, 43.6%, 0%, 17.3%)
CIE-LAB	lab(50.41, 11.33, -53.19)
CIE-LCH	lch(50.41, 54.38, 282.03°)
OKLab	oklab(57.58% -0.0314 -0.1522)
OKLCH	oklch(57.58% 0.155 258.3)
XYZ	xyz(20.0378, 18.7644, 64.1812)
Luminance	0.1877 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3977D3 #D39539

analogous

#39C4D3 #3977D3 #4839D3

triadic

#3977D3 #D33977 #77D339

tetradic

#3977D3 #D339C4 #D39539 #39D348

square

#3977D3 #D339C4 #D39539 #39D348

split-complementary

#3977D3 #D34839 #C4D339

monochromatic

#1A4077 #265BA9 #3977D3 #6B99DE #9DBCE9

Accessibility & contrast

On white

4.42

#3977D3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.75

#3977D3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3977D3

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3977D3	#FFFFFF	#000000	##000000
##3977D3	1.00	4.42	4.75	4.75
#FFFFFF	4.42	1.00	21.00	21.00
#000000	4.75	21.00	1.00	1.00
##000000	4.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4980D7

Deuteranopia (green-blind)

#2C71D1

Tritanopia (blue-blind)

#008D9B

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #3977d3;
/* rgb */ color: rgb(57, 119, 211);
/* oklch */ color: oklch(57.6% 0.155 258.3);

Tailwind

colors: {
  custom: {
    50: '#839de1',
    500: '#3977d3',
    950: '#000000',
  },
}

SCSS

$custom: #3977d3;
$custom-light: #839de1;
$custom-dark: #000000;

JSON

{
  "hex": "#3977d3",
  "rgb": {
    "r": 57,
    "g": 119,
    "b": 211
  },
  "hsl": {
    "h": 215.844,
    "s": 63.636,
    "l": 52.549
  },
  "oklch": {
    "l": 0.57583,
    "c": 0.15545,
    "h": 258.3
  },
  "luminance": 0.18767
}

Semantic roles & 50–950 ramp

primary

#3977D3

secondary

#D5BA92

accent

#A441E7

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3977D3

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

Preview Lab → · Contrast checker → · Palette generator →