#3F78BE#3F78BE

#3F78BE is a mid, vivid cyan. Relative luminance 0.182; OKLCH L 56.7% C 0.124 H 254.8°. Best body text is #000000 at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#3F78BE
RGB	rgb(63, 120, 190)
HSL	hsl(213, 50%, 50%)
HSV	hsv(213, 67%, 75%)
CMYK	cmyk(66.8%, 36.8%, 0%, 25.5%)
CIE-LAB	lab(49.74, 4.05, -42.24)
CIE-LCH	lch(49.74, 42.43, 275.48°)
OKLab	oklab(56.75% -0.0327 -0.12)
OKLCH	oklch(56.75% 0.124 254.8)
XYZ	xyz(18.0572, 18.2056, 51.2676)
Luminance	0.1821 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F78BE #BE853F

analogous

#3FB8BE #3F78BE #463FBE

triadic

#3F78BE #BE3F78 #78BE3F

tetradic

#3F78BE #BE3FB8 #BE853F #3FBE46

square

#3F78BE #BE3FB8 #BE853F #3FBE46

split-complementary

#3F78BE #BE463F #B8BE3F

monochromatic

#213E62 #305B90 #3F78BE #6C98CE #9AB8DD

Accessibility & contrast

On white

4.52

#3F78BE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.64

#3F78BE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F78BE

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F78BE	#FFFFFF	#000000	##000000
##3F78BE	1.00	4.52	4.64	4.64
#FFFFFF	4.52	1.00	21.00	21.00
#000000	4.64	21.00	1.00	1.00
##000000	4.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#597DC1

Deuteranopia (green-blind)

#4771BD

Tritanopia (blue-blind)

#008892

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3f78be;
/* rgb */ color: rgb(63, 120, 190);
/* oklch */ color: oklch(56.7% 0.124 254.8);

Tailwind

colors: {
  custom: {
    50: '#819ed2',
    500: '#3f78be',
    950: '#000000',
  },
}

SCSS

$custom: #3f78be;
$custom-light: #819ed2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f78be",
  "rgb": {
    "r": 63,
    "g": 120,
    "b": 190
  },
  "hsl": {
    "h": 213.071,
    "s": 50.198,
    "l": 49.608
  },
  "oklch": {
    "l": 0.56747,
    "c": 0.12438,
    "h": 254.8
  },
  "luminance": 0.18207
}

Semantic roles & 50–950 ramp

primary

#3F78BE

secondary

#C9AF8F

accent

#9B4EDA

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3F78BE

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

Preview Lab → · Contrast checker → · Palette generator →