#3F79BC#3F79BC

#3F79BC is a mid, vivid cyan. Relative luminance 0.184; OKLCH L 56.9% C 0.121 H 253.5°. Best body text is #000000 at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#3F79BC
RGB	rgb(63, 121, 188)
HSL	hsl(212, 50%, 49%)
HSV	hsv(212, 66%, 74%)
CMYK	cmyk(66.5%, 35.6%, 0%, 26.3%)
CIE-LAB	lab(49.93, 2.74, -40.80)
CIE-LCH	lch(49.93, 40.89, 273.84°)
OKLab	oklab(56.86% -0.0342 -0.1158)
OKLCH	oklch(56.86% 0.121 253.5)
XYZ	xyz(17.9611, 18.3605, 50.1646)
Luminance	0.1836 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F79BC #BC823F

analogous

#3FB8BC #3F79BC #443FBC

triadic

#3F79BC #BC3F79 #79BC3F

tetradic

#3F79BC #BC3FB8 #BC823F #3FBC44

square

#3F79BC #BC3FB8 #BC823F #3FBC44

split-complementary

#3F79BC #BC443F #B8BC3F

monochromatic

#203E60 #305B8E #3F79BC #6B99CD #99B8DD

Accessibility & contrast

On white

4.49

#3F79BC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.67

#3F79BC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F79BC

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F79BC	#FFFFFF	#000000	##000000
##3F79BC	1.00	4.49	4.67	4.67
#FFFFFF	4.49	1.00	21.00	21.00
#000000	4.67	21.00	1.00	1.00
##000000	4.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B7DBF

Deuteranopia (green-blind)

#4A71BB

Tritanopia (blue-blind)

#008991

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3f79bc;
/* rgb */ color: rgb(63, 121, 188);
/* oklch */ color: oklch(56.9% 0.121 253.5);

Tailwind

colors: {
  custom: {
    50: '#819fd0',
    500: '#3f79bc',
    950: '#000000',
  },
}

SCSS

$custom: #3f79bc;
$custom-light: #819fd0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f79bc",
  "rgb": {
    "r": 63,
    "g": 121,
    "b": 188
  },
  "hsl": {
    "h": 212.16,
    "s": 49.801,
    "l": 49.216
  },
  "oklch": {
    "l": 0.56858,
    "c": 0.12073,
    "h": 253.5
  },
  "luminance": 0.18362
}

Semantic roles & 50–950 ramp

primary

#3F79BC

secondary

#C9AD8E

accent

#994ED9

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3F79BC

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

Preview Lab → · Contrast checker → · Palette generator →