#3F77C8#3F77C8

#3F77C8 is a mid, vivid blue. Relative luminance 0.184; OKLCH L 57.1% C 0.139 H 257.8°. Best body text is #000000 at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#3F77C8
RGB	rgb(63, 119, 200)
HSL	hsl(215, 55%, 52%)
HSV	hsv(215, 69%, 78%)
CMYK	cmyk(68.5%, 40.5%, 0%, 21.6%)
CIE-LAB	lab(50.00, 8.22, -47.57)
CIE-LCH	lch(50.00, 48.27, 279.81°)
OKLab	oklab(57.12% -0.0293 -0.1356)
OKLCH	oklch(57.12% 0.139 257.8)
XYZ	xyz(19.0683, 18.4186, 57.1826)
Luminance	0.1842 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F77C8 #C8903F

analogous

#3FBCC8 #3F77C8 #4B3FC8

triadic

#3F77C8 #C83F77 #77C83F

tetradic

#3F77C8 #C83FBC #C8903F #3FC84B

square

#3F77C8 #C83FBC #C8903F #3FC84B

split-complementary

#3F77C8 #C84B3F #BCC83F

monochromatic

#1F3F6D #2D5B9D #3F77C8 #6F99D6 #9EBAE3

Accessibility & contrast

On white

4.48

#3F77C8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.68

#3F77C8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F77C8

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F77C8	#FFFFFF	#000000	##000000
##3F77C8	1.00	4.48	4.68	4.68
#FFFFFF	4.48	1.00	21.00	21.00
#000000	4.68	21.00	1.00	1.00
##000000	4.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#527ECB

Deuteranopia (green-blind)

#3C71C6

Tritanopia (blue-blind)

#008A96

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3f77c8;
/* rgb */ color: rgb(63, 119, 200);
/* oklch */ color: oklch(57.1% 0.139 257.8);

Tailwind

colors: {
  custom: {
    50: '#839dd9',
    500: '#3f77c8',
    950: '#000000',
  },
}

SCSS

$custom: #3f77c8;
$custom-light: #839dd9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f77c8",
  "rgb": {
    "r": 63,
    "g": 119,
    "b": 200
  },
  "hsl": {
    "h": 215.474,
    "s": 55.466,
    "l": 51.569
  },
  "oklch": {
    "l": 0.57122,
    "c": 0.13878,
    "h": 257.8
  },
  "luminance": 0.18421
}

Semantic roles & 50–950 ramp

primary

#3F77C8

secondary

#D0B793

accent

#A249DF

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F77C8

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

Preview Lab → · Contrast checker → · Palette generator →