#3F75C3#3F75C3

#3F75C3 is a mid, vivid blue. Relative luminance 0.177; OKLCH L 56.4% C 0.134 H 257.7°. Best body text is #FFFFFF at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#3F75C3
RGB	rgb(63, 117, 195)
HSL	hsl(215, 52%, 51%)
HSV	hsv(215, 68%, 76%)
CMYK	cmyk(67.7%, 40%, 0%, 23.5%)
CIE-LAB	lab(49.15, 7.67, -46.05)
CIE-LCH	lch(49.15, 46.69, 279.46°)
OKLab	oklab(56.37% -0.0285 -0.1312)
OKLCH	oklch(56.37% 0.134 257.7)
XYZ	xyz(18.2580, 17.7176, 54.0768)
Luminance	0.1772 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F75C3 #C38D3F

analogous

#3FB7C3 #3F75C3 #4B3FC3

triadic

#3F75C3 #C33F75 #75C33F

tetradic

#3F75C3 #C33FB7 #C38D3F #3FC34B

square

#3F75C3 #C33FB7 #C38D3F #3FC34B

split-complementary

#3F75C3 #C34B3F #B7C33F

monochromatic

#203D67 #2F5996 #3F75C3 #6E97D2 #9CB8E0

Accessibility & contrast

On white

4.62

#3F75C3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.54

#3F75C3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3F75C3

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F75C3	#FFFFFF	#000000	##FFFFFF
##3F75C3	1.00	4.62	4.54	4.62
#FFFFFF	4.62	1.00	21.00	1.00
#000000	4.54	21.00	1.00	21.00
##FFFFFF	4.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#517BC6

Deuteranopia (green-blind)

#3D6FC1

Tritanopia (blue-blind)

#008792

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3f75c3;
/* rgb */ color: rgb(63, 117, 195);
/* oklch */ color: oklch(56.4% 0.134 257.7);

Tailwind

colors: {
  custom: {
    50: '#829cd5',
    500: '#3f75c3',
    950: '#000000',
  },
}

SCSS

$custom: #3f75c3;
$custom-light: #829cd5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f75c3",
  "rgb": {
    "r": 63,
    "g": 117,
    "b": 195
  },
  "hsl": {
    "h": 215.455,
    "s": 52.381,
    "l": 50.588
  },
  "oklch": {
    "l": 0.56373,
    "c": 0.13429,
    "h": 257.7
  },
  "luminance": 0.17719
}

Semantic roles & 50–950 ramp

primary

#3F75C3

secondary

#CCB492

accent

#A14CDC

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0E14

muted

#7D7E83

Preview Lab

Preview with #3F75C3

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

Preview Lab → · Contrast checker → · Palette generator →