#3F77C9#3F77C9

#3F77C9 is a mid, vivid blue. Relative luminance 0.185; OKLCH L 57.2% C 0.140 H 258.0°. Best body text is #000000 at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#3F77C9
RGB	rgb(63, 119, 201)
HSL	hsl(216, 56%, 52%)
HSV	hsv(216, 69%, 79%)
CMYK	cmyk(68.7%, 40.8%, 0%, 21.2%)
CIE-LAB	lab(50.06, 8.58, -48.05)
CIE-LCH	lch(50.06, 48.81, 280.12°)
OKLab	oklab(57.18% -0.0291 -0.137)
OKLCH	oklch(57.18% 0.14 258)
XYZ	xyz(19.1855, 18.4655, 57.8001)
Luminance	0.1847 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F77C9 #C9913F

analogous

#3FBCC9 #3F77C9 #4C3FC9

triadic

#3F77C9 #C93F77 #77C93F

tetradic

#3F77C9 #C93FBC #C9913F #3FC94C

square

#3F77C9 #C93FBC #C9913F #3FC94C

split-complementary

#3F77C9 #C94C3F #BCC93F

monochromatic

#1F3F6F #2D5B9E #3F77C9 #6F99D6 #9FBBE4

Accessibility & contrast

On white

4.47

#3F77C9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.69

#3F77C9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F77C9

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F77C9	#FFFFFF	#000000	##000000
##3F77C9	1.00	4.47	4.69	4.69
#FFFFFF	4.47	1.00	21.00	21.00
#000000	4.69	21.00	1.00	1.00
##000000	4.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#517ECC

Deuteranopia (green-blind)

#3B71C7

Tritanopia (blue-blind)

#008A96

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3f77c9;
/* rgb */ color: rgb(63, 119, 201);
/* oklch */ color: oklch(57.2% 0.140 258.0);

Tailwind

colors: {
  custom: {
    50: '#839dda',
    500: '#3f77c9',
    950: '#000000',
  },
}

SCSS

$custom: #3f77c9;
$custom-light: #839dda;
$custom-dark: #000000;

JSON

{
  "hex": "#3f77c9",
  "rgb": {
    "r": 63,
    "g": 119,
    "b": 201
  },
  "hsl": {
    "h": 215.652,
    "s": 56.098,
    "l": 51.765
  },
  "oklch": {
    "l": 0.57184,
    "c": 0.14011,
    "h": 258
  },
  "luminance": 0.18467
}

Semantic roles & 50–950 ramp

primary

#3F77C9

secondary

#D0B894

accent

#A248DF

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F77C9

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

Preview Lab → · Contrast checker → · Palette generator →