#3F77D1#3F77D1

#3F77D1 is a mid, vivid blue. Relative luminance 0.189; OKLCH L 57.7% C 0.151 H 259.5°. Best body text is #000000 at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#3F77D1
RGB	rgb(63, 119, 209)
HSL	hsl(217, 61%, 53%)
HSV	hsv(217, 70%, 82%)
CMYK	cmyk(69.9%, 43.1%, 0%, 18%)
CIE-LAB	lab(50.51, 11.45, -51.88)
CIE-LCH	lch(50.51, 53.13, 282.44°)
OKLab	oklab(57.69% -0.0275 -0.1483)
OKLCH	oklch(57.69% 0.151 259.5)
XYZ	xyz(20.1512, 18.8517, 62.8860)
Luminance	0.1885 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F77D1 #D1993F

analogous

#3FC0D1 #3F77D1 #503FD1

triadic

#3F77D1 #D13F77 #77D13F

tetradic

#3F77D1 #D13FC0 #D1993F #3FD150

square

#3F77D1 #D13FC0 #D1993F #3FD150

split-complementary

#3F77D1 #D1503F #C0D13F

monochromatic

#1D4079 #295AAA #3F77D1 #709ADD #A2BDE9

Accessibility & contrast

On white

4.40

#3F77D1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.77

#3F77D1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F77D1

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F77D1	#FFFFFF	#000000	##000000
##3F77D1	1.00	4.40	4.77	4.77
#FFFFFF	4.40	1.00	21.00	21.00
#000000	4.77	21.00	1.00	1.00
##000000	4.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B7FD4

Deuteranopia (green-blind)

#3272CF

Tritanopia (blue-blind)

#008C9A

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #3f77d1;
/* rgb */ color: rgb(63, 119, 209);
/* oklch */ color: oklch(57.7% 0.151 259.5);

Tailwind

colors: {
  custom: {
    50: '#859ddf',
    500: '#3f77d1',
    950: '#000000',
  },
}

SCSS

$custom: #3f77d1;
$custom-light: #859ddf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f77d1",
  "rgb": {
    "r": 63,
    "g": 119,
    "b": 209
  },
  "hsl": {
    "h": 216.986,
    "s": 61.345,
    "l": 53.333
  },
  "oklch": {
    "l": 0.57686,
    "c": 0.15082,
    "h": 259.5
  },
  "luminance": 0.18854
}

Semantic roles & 50–950 ramp

primary

#3F77D1

secondary

#D5BD97

accent

#A743E4

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F77D1

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

Preview Lab → · Contrast checker → · Palette generator →