#3F77CA#3F77CA

#3F77CA is a mid, vivid blue. Relative luminance 0.185; OKLCH L 57.2% C 0.141 H 258.2°. Best body text is #000000 at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#3F77CA
RGB	rgb(63, 119, 202)
HSL	hsl(216, 57%, 52%)
HSV	hsv(216, 69%, 79%)
CMYK	cmyk(68.8%, 41.1%, 0%, 20.8%)
CIE-LAB	lab(50.11, 8.94, -48.53)
CIE-LCH	lch(50.11, 49.35, 280.43°)
OKLab	oklab(57.25% -0.0289 -0.1385)
OKLCH	oklch(57.25% 0.141 258.2)
XYZ	xyz(19.3035, 18.5127, 58.4216)
Luminance	0.1852 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F77CA #CA923F

analogous

#3FBDCA #3F77CA #4C3FCA

triadic

#3F77CA #CA3F77 #77CA3F

tetradic

#3F77CA #CA3FBD #CA923F #3FCA4C

square

#3F77CA #CA3FBD #CA923F #3FCA4C

split-complementary

#3F77CA #CA4C3F #BDCA3F

monochromatic

#1F3F70 #2C5BA0 #3F77CA #6F99D7 #9FBBE4

Accessibility & contrast

On white

4.47

#3F77CA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.70

#3F77CA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F77CA

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F77CA	#FFFFFF	#000000	##000000
##3F77CA	1.00	4.47	4.70	4.70
#FFFFFF	4.47	1.00	21.00	21.00
#000000	4.70	21.00	1.00	1.00
##000000	4.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#507ECD

Deuteranopia (green-blind)

#3A71C8

Tritanopia (blue-blind)

#008A97

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3f77ca;
/* rgb */ color: rgb(63, 119, 202);
/* oklch */ color: oklch(57.2% 0.141 258.2);

Tailwind

colors: {
  custom: {
    50: '#839dda',
    500: '#3f77ca',
    950: '#000000',
  },
}

SCSS

$custom: #3f77ca;
$custom-light: #839dda;
$custom-dark: #000000;

JSON

{
  "hex": "#3f77ca",
  "rgb": {
    "r": 63,
    "g": 119,
    "b": 202
  },
  "hsl": {
    "h": 215.827,
    "s": 56.735,
    "l": 51.961
  },
  "oklch": {
    "l": 0.57246,
    "c": 0.14145,
    "h": 258.2
  },
  "luminance": 0.18515
}

Semantic roles & 50–950 ramp

primary

#3F77CA

secondary

#D1B894

accent

#A348E0

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F77CA

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

Preview Lab → · Contrast checker → · Palette generator →