#3F77D7#3F77D7

#3F77D7 is a mid, vivid blue. Relative luminance 0.192; OKLCH L 58.1% C 0.159 H 260.4°. Best body text is #000000 at 4.83:1 contrast (WCAG AA passes).

Color values

HEX	#3F77D7
RGB	rgb(63, 119, 215)
HSL	hsl(218, 66%, 55%)
HSV	hsv(218, 71%, 84%)
CMYK	cmyk(70.7%, 44.7%, 0%, 15.7%)
CIE-LAB	lab(50.87, 13.61, -54.71)
CIE-LCH	lch(50.87, 56.38, 283.97°)
OKLab	oklab(58.07% -0.0264 -0.1566)
OKLCH	oklch(58.07% 0.159 260.4)
XYZ	xyz(20.9081, 19.1545, 66.8721)
Luminance	0.1916 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F77D7 #D79F3F

analogous

#3FC3D7 #3F77D7 #533FD7

triadic

#3F77D7 #D73F77 #77D73F

tetradic

#3F77D7 #D73FC3 #D79F3F #3FD753

square

#3F77D7 #D73FC3 #D79F3F #3FD753

split-complementary

#3F77D7 #D7533F #C3D73F

monochromatic

#1B4081 #255AB3 #3F77D7 #729BE2 #A4BFEC

Accessibility & contrast

On white

4.35

#3F77D7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.83

#3F77D7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F77D7

4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F77D7	#FFFFFF	#000000	##000000
##3F77D7	1.00	4.35	4.83	4.83
#FFFFFF	4.35	1.00	21.00	21.00
#000000	4.83	21.00	1.00	1.00
##000000	4.83	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4781DB

Deuteranopia (green-blind)

#2973D5

Tritanopia (blue-blind)

#008D9C

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #3f77d7;
/* rgb */ color: rgb(63, 119, 215);
/* oklch */ color: oklch(58.1% 0.159 260.4);

Tailwind

colors: {
  custom: {
    50: '#869de4',
    500: '#3f77d7',
    950: '#000000',
  },
}

SCSS

$custom: #3f77d7;
$custom-light: #869de4;
$custom-dark: #000000;

JSON

{
  "hex": "#3f77d7",
  "rgb": {
    "r": 63,
    "g": 119,
    "b": 215
  },
  "hsl": {
    "h": 217.895,
    "s": 65.517,
    "l": 54.51
  },
  "oklch": {
    "l": 0.58074,
    "c": 0.15884,
    "h": 260.4
  },
  "luminance": 0.19157
}

Semantic roles & 50–950 ramp

primary

#3F77D7

secondary

#D9C199

accent

#AA3FE8

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0E15

muted

#7D7E84

Preview Lab

Preview with #3F77D7

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

Preview Lab → · Contrast checker → · Palette generator →