#3979DF#3979DF

#3979DF is a mid, vivid blue. Relative luminance 0.199; OKLCH L 58.8% C 0.169 H 259.4°. Best body text is #000000 at 4.97:1 contrast (WCAG AA passes).

Color values

HEX	#3979DF
RGB	rgb(57, 121, 223)
HSL	hsl(217, 72%, 55%)
HSV	hsv(217, 74%, 87%)
CMYK	cmyk(74.4%, 45.7%, 0%, 12.5%)
CIE-LAB	lab(51.69, 14.48, -57.92)
CIE-LCH	lch(51.69, 59.71, 284.03°)
OKLab	oklab(58.8% -0.031 -0.1661)
OKLCH	oklch(58.8% 0.169 259.4)
XYZ	xyz(21.8392, 19.8699, 72.4820)
Luminance	0.1987 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3979DF #DF9F39

analogous

#39CCDF #3979DF #4C39DF

triadic

#3979DF #DF3979 #79DF39

tetradic

#3979DF #DF39CC #DF9F39 #39DF4C

square

#3979DF #DF39CC #DF9F39 #39DF4C

split-complementary

#3979DF #DF4C39 #CCDF39

monochromatic

#164288 #1E5BBC #3979DF #6E9DE8 #A2C0F0

Accessibility & contrast

On white

4.22

#3979DF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.97

#3979DF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3979DF

4.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3979DF	#FFFFFF	#000000	##000000
##3979DF	1.00	4.22	4.97	4.97
#FFFFFF	4.22	1.00	21.00	21.00
#000000	4.97	21.00	1.00	1.00
##000000	4.97	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4383E3

Deuteranopia (green-blind)

#1C74DD

Tritanopia (blue-blind)

#0091A1

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #3979df;
/* rgb */ color: rgb(57, 121, 223);
/* oklch */ color: oklch(58.8% 0.169 259.4);

Tailwind

colors: {
  custom: {
    50: '#859fea',
    500: '#3979df',
    950: '#000000',
  },
}

SCSS

$custom: #3979df;
$custom-light: #859fea;
$custom-dark: #000000;

JSON

{
  "hex": "#3979df",
  "rgb": {
    "r": 57,
    "g": 121,
    "b": 223
  },
  "hsl": {
    "h": 216.867,
    "s": 72.174,
    "l": 54.902
  },
  "oklch": {
    "l": 0.58803,
    "c": 0.16899,
    "h": 259.4
  },
  "luminance": 0.19872
}

Semantic roles & 50–950 ramp

primary

#3979DF

secondary

#DDC297

accent

#A939EF

background

#F8F9FE

surface

#F0F2FD

border

#CBCCD5

text

#0D0E16

muted

#7D7E84

Preview Lab

Preview with #3979DF

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

Preview Lab → · Contrast checker → · Palette generator →