#3979D9#3979D9

#3979D9 is a mid, vivid blue. Relative luminance 0.196; OKLCH L 58.4% C 0.161 H 258.5°. Best body text is #000000 at 4.91:1 contrast (WCAG AA passes).

Color values

HEX	#3979D9
RGB	rgb(57, 121, 217)
HSL	hsl(216, 68%, 54%)
HSV	hsv(216, 74%, 85%)
CMYK	cmyk(73.7%, 44.2%, 0%, 14.9%)
CIE-LAB	lab(51.33, 12.28, -55.12)
CIE-LCH	lch(51.33, 56.47, 282.56°)
OKLab	oklab(58.41% -0.032 -0.1579)
OKLCH	oklch(58.41% 0.161 258.5)
XYZ	xyz(21.0445, 19.5520, 68.2970)
Luminance	0.1955 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3979D9 #D99939

analogous

#39C9D9 #3979D9 #4939D9

triadic

#3979D9 #D93979 #79D939

tetradic

#3979D9 #D939C9 #D99939 #39D949

square

#3979D9 #D939C9 #D99939 #39D949

split-complementary

#3979D9 #D94939 #C9D939

monochromatic

#18427F #225CB3 #3979D9 #6C9CE3 #A0BEED

Accessibility & contrast

On white

4.28

#3979D9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.91

#3979D9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3979D9

4.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3979D9	#FFFFFF	#000000	##000000
##3979D9	1.00	4.28	4.91	4.91
#FFFFFF	4.28	1.00	21.00	21.00
#000000	4.91	21.00	1.00	1.00
##000000	4.91	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4882DD

Deuteranopia (green-blind)

#2873D7

Tritanopia (blue-blind)

#00909E

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3979d9;
/* rgb */ color: rgb(57, 121, 217);
/* oklch */ color: oklch(58.4% 0.161 258.5);

Tailwind

colors: {
  custom: {
    50: '#849fe5',
    500: '#3979d9',
    950: '#000000',
  },
}

SCSS

$custom: #3979d9;
$custom-light: #849fe5;
$custom-dark: #000000;

JSON

{
  "hex": "#3979d9",
  "rgb": {
    "r": 57,
    "g": 121,
    "b": 217
  },
  "hsl": {
    "h": 216,
    "s": 67.797,
    "l": 53.725
  },
  "oklch": {
    "l": 0.58406,
    "c": 0.1611,
    "h": 258.5
  },
  "luminance": 0.19554
}

Semantic roles & 50–950 ramp

primary

#3979D9

secondary

#D9BE95

accent

#A53DEB

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #3979D9

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

Preview Lab → · Contrast checker → · Palette generator →