#3F75C2#3F75C2

#3F75C2 is a mid, vivid blue. Relative luminance 0.177; OKLCH L 56.3% C 0.133 H 257.5°. Best body text is #FFFFFF at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#3F75C2
RGB	rgb(63, 117, 194)
HSL	hsl(215, 52%, 50%)
HSV	hsv(215, 68%, 76%)
CMYK	cmyk(67.5%, 39.7%, 0%, 23.9%)
CIE-LAB	lab(49.10, 7.31, -45.57)
CIE-LCH	lch(49.10, 46.15, 279.12°)
OKLab	oklab(56.31% -0.0287 -0.1298)
OKLCH	oklch(56.31% 0.133 257.5)
XYZ	xyz(18.1453, 17.6725, 53.4833)
Luminance	0.1767 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F75C2 #C28C3F

analogous

#3FB7C2 #3F75C2 #4A3FC2

triadic

#3F75C2 #C23F75 #75C23F

tetradic

#3F75C2 #C23FB7 #C28C3F #3FC24A

square

#3F75C2 #C23FB7 #C28C3F #3FC24A

split-complementary

#3F75C2 #C24A3F #B7C23F

monochromatic

#203D66 #2F5995 #3F75C2 #6D96D1 #9CB8E0

Accessibility & contrast

On white

4.63

#3F75C2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.53

#3F75C2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3F75C2

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F75C2	#FFFFFF	#000000	##FFFFFF
##3F75C2	1.00	4.63	4.53	4.63
#FFFFFF	4.63	1.00	21.00	1.00
#000000	4.53	21.00	1.00	21.00
##FFFFFF	4.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#527BC5

Deuteranopia (green-blind)

#3E6FC0

Tritanopia (blue-blind)

#008792

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3f75c2;
/* rgb */ color: rgb(63, 117, 194);
/* oklch */ color: oklch(56.3% 0.133 257.5);

Tailwind

colors: {
  custom: {
    50: '#829cd5',
    500: '#3f75c2',
    950: '#000000',
  },
}

SCSS

$custom: #3f75c2;
$custom-light: #829cd5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f75c2",
  "rgb": {
    "r": 63,
    "g": 117,
    "b": 194
  },
  "hsl": {
    "h": 215.267,
    "s": 51.779,
    "l": 50.392
  },
  "oklch": {
    "l": 0.56312,
    "c": 0.13294,
    "h": 257.5
  },
  "luminance": 0.17674
}

Semantic roles & 50–950 ramp

primary

#3F75C2

secondary

#CCB491

accent

#A04DDB

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0E14

muted

#7D7E83

Preview Lab

Preview with #3F75C2

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

Preview Lab → · Contrast checker → · Palette generator →