#3F78CE#3F78CE

#3F78CE is a mid, vivid blue. Relative luminance 0.189; OKLCH L 57.7% C 0.146 H 258.5°. Best body text is #000000 at 4.79:1 contrast (WCAG AA passes).

Color values

HEX	#3F78CE
RGB	rgb(63, 120, 206)
HSL	hsl(216, 59%, 53%)
HSV	hsv(216, 69%, 81%)
CMYK	cmyk(69.4%, 41.7%, 0%, 19.2%)
CIE-LAB	lab(50.62, 9.75, -50.00)
CIE-LCH	lch(50.62, 50.94, 281.04°)
OKLab	oklab(57.71% -0.029 -0.1428)
OKLCH	oklch(57.71% 0.146 258.5)
XYZ	xyz(19.9029, 18.9439, 60.9882)
Luminance	0.1895 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F78CE #CE953F

analogous

#3FBFCE #3F78CE #4D3FCE

triadic

#3F78CE #CE3F78 #78CE3F

tetradic

#3F78CE #CE3FBF #CE953F #3FCE4D

square

#3F78CE #CE3FBF #CE953F #3FCE4D

split-complementary

#3F78CE #CE4D3F #BFCE3F

monochromatic

#1E4075 #2A5BA6 #3F78CE #709ADA #A1BDE7

Accessibility & contrast

On white

4.38

#3F78CE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.79

#3F78CE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F78CE

4.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F78CE	#FFFFFF	#000000	##000000
##3F78CE	1.00	4.38	4.79	4.79
#FFFFFF	4.38	1.00	21.00	21.00
#000000	4.79	21.00	1.00	1.00
##000000	4.79	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F80D1

Deuteranopia (green-blind)

#3872CC

Tritanopia (blue-blind)

#008C99

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #3f78ce;
/* rgb */ color: rgb(63, 120, 206);
/* oklch */ color: oklch(57.7% 0.146 258.5);

Tailwind

colors: {
  custom: {
    50: '#849edd',
    500: '#3f78ce',
    950: '#000000',
  },
}

SCSS

$custom: #3f78ce;
$custom-light: #849edd;
$custom-dark: #000000;

JSON

{
  "hex": "#3f78ce",
  "rgb": {
    "r": 63,
    "g": 120,
    "b": 206
  },
  "hsl": {
    "h": 216.084,
    "s": 59.336,
    "l": 52.745
  },
  "oklch": {
    "l": 0.57714,
    "c": 0.14568,
    "h": 258.5
  },
  "luminance": 0.18946
}

Semantic roles & 50–950 ramp

primary

#3F78CE

secondary

#D3BB95

accent

#A445E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F78CE

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

Preview Lab → · Contrast checker → · Palette generator →