#3977D7#3977D7

#3977D7 is a mid, vivid blue. Relative luminance 0.190; OKLCH L 57.8% C 0.161 H 259.0°. Best body text is #000000 at 4.79:1 contrast (WCAG AA passes).

Color values

HEX	#3977D7
RGB	rgb(57, 119, 215)
HSL	hsl(216, 66%, 53%)
HSV	hsv(216, 73%, 84%)
CMYK	cmyk(73.5%, 44.7%, 0%, 15.7%)
CIE-LAB	lab(50.65, 12.79, -55.08)
CIE-LCH	lch(50.65, 56.54, 283.08°)
OKLab	oklab(57.85% -0.0307 -0.1578)
OKLCH	oklch(57.85% 0.161 259)
XYZ	xyz(20.5455, 18.9675, 66.8551)
Luminance	0.1897 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3977D7 #D79939

analogous

#39C6D7 #3977D7 #4A39D7

triadic

#3977D7 #D73977 #77D739

tetradic

#3977D7 #D739C6 #D79939 #39D74A

square

#3977D7 #D739C6 #D79939 #39D74A

split-complementary

#3977D7 #D74A39 #C6D739

monochromatic

#19407C #235AAF #3977D7 #6C9AE1 #9FBDEC

Accessibility & contrast

On white

4.38

#3977D7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.79

#3977D7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3977D7

4.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3977D7	#FFFFFF	#000000	##000000
##3977D7	1.00	4.38	4.79	4.79
#FFFFFF	4.38	1.00	21.00	21.00
#000000	4.79	21.00	1.00	1.00
##000000	4.79	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4680DB

Deuteranopia (green-blind)

#2572D5

Tritanopia (blue-blind)

#008E9C

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #3977d7;
/* rgb */ color: rgb(57, 119, 215);
/* oklch */ color: oklch(57.8% 0.161 259.0);

Tailwind

colors: {
  custom: {
    50: '#839de4',
    500: '#3977d7',
    950: '#000000',
  },
}

SCSS

$custom: #3977d7;
$custom-light: #839de4;
$custom-dark: #000000;

JSON

{
  "hex": "#3977d7",
  "rgb": {
    "r": 57,
    "g": 119,
    "b": 215
  },
  "hsl": {
    "h": 216.456,
    "s": 66.387,
    "l": 53.333
  },
  "oklch": {
    "l": 0.57845,
    "c": 0.16075,
    "h": 259
  },
  "luminance": 0.1897
}

Semantic roles & 50–950 ramp

primary

#3977D7

secondary

#D8BD94

accent

#A63EE9

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0E15

muted

#7D7E84

Preview Lab

Preview with #3977D7

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

Preview Lab → · Contrast checker → · Palette generator →