#3F78BC#3F78BC

#3F78BC is a mid, vivid cyan. Relative luminance 0.181; OKLCH L 56.6% C 0.122 H 254.2°. Best body text is #000000 at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#3F78BC
RGB	rgb(63, 120, 188)
HSL	hsl(213, 50%, 49%)
HSV	hsv(213, 66%, 74%)
CMYK	cmyk(66.5%, 36.2%, 0%, 26.3%)
CIE-LAB	lab(49.64, 3.35, -41.26)
CIE-LCH	lch(49.64, 41.39, 274.64°)
OKLab	oklab(56.63% -0.0332 -0.1171)
OKLCH	oklch(56.63% 0.122 254.2)
XYZ	xyz(17.8402, 18.1188, 50.1243)
Luminance	0.1812 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F78BC #BC833F

analogous

#3FB7BC #3F78BC #453FBC

triadic

#3F78BC #BC3F78 #78BC3F

tetradic

#3F78BC #BC3FB7 #BC833F #3FBC45

square

#3F78BC #BC3FB7 #BC833F #3FBC45

split-complementary

#3F78BC #BC453F #B7BC3F

monochromatic

#203D60 #305B8E #3F78BC #6B98CD #99B8DD

Accessibility & contrast

On white

4.54

#3F78BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.62

#3F78BC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F78BC

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F78BC	#FFFFFF	#000000	##000000
##3F78BC	1.00	4.54	4.62	4.62
#FFFFFF	4.54	1.00	21.00	21.00
#000000	4.62	21.00	1.00	1.00
##000000	4.62	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A7CBF

Deuteranopia (green-blind)

#4871BB

Tritanopia (blue-blind)

#008891

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3f78bc;
/* rgb */ color: rgb(63, 120, 188);
/* oklch */ color: oklch(56.6% 0.122 254.2);

Tailwind

colors: {
  custom: {
    50: '#819ed0',
    500: '#3f78bc',
    950: '#000000',
  },
}

SCSS

$custom: #3f78bc;
$custom-light: #819ed0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f78bc",
  "rgb": {
    "r": 63,
    "g": 120,
    "b": 188
  },
  "hsl": {
    "h": 212.64,
    "s": 49.801,
    "l": 49.216
  },
  "oklch": {
    "l": 0.56631,
    "c": 0.12174,
    "h": 254.2
  },
  "luminance": 0.18121
}

Semantic roles & 50–950 ramp

primary

#3F78BC

secondary

#C9AE8E

accent

#9A4ED9

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3F78BC

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

Preview Lab → · Contrast checker → · Palette generator →