#3F75C8#3F75C8

#3F75C8 is a mid, vivid blue. Relative luminance 0.179; OKLCH L 56.7% C 0.141 H 258.8°. Best body text is #000000 at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#3F75C8
RGB	rgb(63, 117, 200)
HSL	hsl(216, 55%, 52%)
HSV	hsv(216, 69%, 78%)
CMYK	cmyk(68.5%, 41.5%, 0%, 21.6%)
CIE-LAB	lab(49.43, 9.46, -48.47)
CIE-LCH	lch(49.43, 49.39, 281.04°)
OKLab	oklab(56.68% -0.0274 -0.1383)
OKLCH	oklch(56.68% 0.141 258.8)
XYZ	xyz(18.8328, 17.9475, 57.1041)
Luminance	0.1795 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F75C8 #C8923F

analogous

#3FBAC8 #3F75C8 #4E3FC8

triadic

#3F75C8 #C83F75 #75C83F

tetradic

#3F75C8 #C83FBA #C8923F #3FC84E

square

#3F75C8 #C83FBA #C8923F #3FC84E

split-complementary

#3F75C8 #C84E3F #BAC83F

monochromatic

#1F3E6D #2D599D #3F75C8 #6F97D6 #9EB9E3

Accessibility & contrast

On white

4.58

#3F75C8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.59

#3F75C8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F75C8

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F75C8	#FFFFFF	#000000	##000000
##3F75C8	1.00	4.58	4.59	4.59
#FFFFFF	4.58	1.00	21.00	21.00
#000000	4.59	21.00	1.00	1.00
##000000	4.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E7CCB

Deuteranopia (green-blind)

#3870C6

Tritanopia (blue-blind)

#008895

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3f75c8;
/* rgb */ color: rgb(63, 117, 200);
/* oklch */ color: oklch(56.7% 0.141 258.8);

Tailwind

colors: {
  custom: {
    50: '#839cd9',
    500: '#3f75c8',
    950: '#000000',
  },
}

SCSS

$custom: #3f75c8;
$custom-light: #839cd9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f75c8",
  "rgb": {
    "r": 63,
    "g": 117,
    "b": 200
  },
  "hsl": {
    "h": 216.35,
    "s": 55.466,
    "l": 51.569
  },
  "oklch": {
    "l": 0.56682,
    "c": 0.14102,
    "h": 258.8
  },
  "luminance": 0.17949
}

Semantic roles & 50–950 ramp

primary

#3F75C8

secondary

#D0B893

accent

#A449DF

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F75C8

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

Preview Lab → · Contrast checker → · Palette generator →