#3F79CC#3F79CC

#3F79CC is a mid, vivid blue. Relative luminance 0.191; OKLCH L 57.8% C 0.142 H 257.6°. Best body text is #000000 at 4.82:1 contrast (WCAG AA passes).

Color values

HEX	#3F79CC
RGB	rgb(63, 121, 204)
HSL	hsl(215, 58%, 52%)
HSV	hsv(215, 69%, 80%)
CMYK	cmyk(69.1%, 40.7%, 0%, 20%)
CIE-LAB	lab(50.79, 8.42, -48.59)
CIE-LCH	lch(50.79, 49.31, 279.83°)
OKLab	oklab(57.81% -0.0304 -0.1386)
OKLCH	oklch(57.81% 0.142 257.6)
XYZ	xyz(19.7824, 19.0891, 59.7570)
Luminance	0.1909 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F79CC #CC923F

analogous

#3FC0CC #3F79CC #4B3FCC

triadic

#3F79CC #CC3F79 #79CC3F

tetradic

#3F79CC #CC3FC0 #CC923F #3FCC4B

square

#3F79CC #CC3FC0 #CC923F #3FCC4B

split-complementary

#3F79CC #CC4B3F #C0CC3F

monochromatic

#1E4172 #2B5CA3 #3F79CC #6F9BD9 #A0BCE6

Accessibility & contrast

On white

4.36

#3F79CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.82

#3F79CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F79CC

4.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F79CC	#FFFFFF	#000000	##000000
##3F79CC	1.00	4.36	4.82	4.82
#FFFFFF	4.36	1.00	21.00	21.00
#000000	4.82	21.00	1.00	1.00
##000000	4.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5280CF

Deuteranopia (green-blind)

#3C73CA

Tritanopia (blue-blind)

#008C98

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #3f79cc;
/* rgb */ color: rgb(63, 121, 204);
/* oklch */ color: oklch(57.8% 0.142 257.6);

Tailwind

colors: {
  custom: {
    50: '#849fdc',
    500: '#3f79cc',
    950: '#000000',
  },
}

SCSS

$custom: #3f79cc;
$custom-light: #849fdc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f79cc",
  "rgb": {
    "r": 63,
    "g": 121,
    "b": 204
  },
  "hsl": {
    "h": 215.319,
    "s": 58.025,
    "l": 52.353
  },
  "oklch": {
    "l": 0.57809,
    "c": 0.14189,
    "h": 257.6
  },
  "luminance": 0.19091
}

Semantic roles & 50–950 ramp

primary

#3F79CC

secondary

#D2B995

accent

#A247E1

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F79CC

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

Preview Lab → · Contrast checker → · Palette generator →