#3F79B3#3F79B3

#3F79B3 is a mid, moderate cyan. Relative luminance 0.180; OKLCH L 56.4% C 0.109 H 250.3°. Best body text is #000000 at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#3F79B3
RGB	rgb(63, 121, 179)
HSL	hsl(210, 48%, 47%)
HSV	hsv(210, 65%, 70%)
CMYK	cmyk(64.8%, 32.4%, 0%, 29.8%)
CIE-LAB	lab(49.48, -0.40, -36.32)
CIE-LCH	lch(49.48, 36.32, 269.37°)
OKLab	oklab(56.36% -0.0367 -0.1027)
OKLCH	oklch(56.36% 0.109 250.3)
XYZ	xyz(17.0210, 17.9845, 45.2134)
Luminance	0.1799 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F79B3 #B3793F

analogous

#3FB3B3 #3F79B3 #3F3FB3

triadic

#3F79B3 #B33F79 #79B33F

tetradic

#3F79B3 #B33FB3 #B3793F #3FB33F

square

#3F79B3 #B33FB3 #B3793F #3FB33F

split-complementary

#3F79B3 #B33F3F #B3B33F

monochromatic

#1F3C58 #2F5A86 #3F79B3 #6698C9 #93B6D9

Accessibility & contrast

On white

4.57

#3F79B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.60

#3F79B3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F79B3

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F79B3	#FFFFFF	#000000	##000000
##3F79B3	1.00	4.57	4.60	4.60
#FFFFFF	4.57	1.00	21.00	21.00
#000000	4.60	21.00	1.00	1.00
##000000	4.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#607CB5

Deuteranopia (green-blind)

#5071B2

Tritanopia (blue-blind)

#00878E

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3f79b3;
/* rgb */ color: rgb(63, 121, 179);
/* oklch */ color: oklch(56.4% 0.109 250.3);

Tailwind

colors: {
  custom: {
    50: '#7f9fca',
    500: '#3f79b3',
    950: '#000000',
  },
}

SCSS

$custom: #3f79b3;
$custom-light: #7f9fca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f79b3",
  "rgb": {
    "r": 63,
    "g": 121,
    "b": 179
  },
  "hsl": {
    "h": 210,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.56355,
    "c": 0.10907,
    "h": 250.3
  },
  "luminance": 0.17986
}

Semantic roles & 50–950 ramp

primary

#3F79B3

secondary

#C4A789

accent

#9450D8

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3F79B3

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

Preview Lab → · Contrast checker → · Palette generator →