#3F75C5#3F75C5

#3F75C5 is a mid, vivid blue. Relative luminance 0.178; OKLCH L 56.5% C 0.137 H 258.2°. Best body text is #FFFFFF at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#3F75C5
RGB	rgb(63, 117, 197)
HSL	hsl(216, 54%, 51%)
HSV	hsv(216, 68%, 77%)
CMYK	cmyk(68%, 40.6%, 0%, 22.7%)
CIE-LAB	lab(49.26, 8.38, -47.02)
CIE-LCH	lch(49.26, 47.77, 280.11°)
OKLab	oklab(56.5% -0.0281 -0.1341)
OKLCH	oklch(56.5% 0.137 258.2)
XYZ	xyz(18.4856, 17.8087, 55.2757)
Luminance	0.1781 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F75C5 #C58F3F

analogous

#3FB8C5 #3F75C5 #4C3FC5

triadic

#3F75C5 #C53F75 #75C53F

tetradic

#3F75C5 #C53FB8 #C58F3F #3FC54C

square

#3F75C5 #C53FB8 #C58F3F #3FC54C

split-complementary

#3F75C5 #C54C3F #B8C53F

monochromatic

#203E6A #2E5999 #3F75C5 #6E97D3 #9DB9E1

Accessibility & contrast

On white

4.60

#3F75C5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.56

#3F75C5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3F75C5

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F75C5	#FFFFFF	#000000	##FFFFFF
##3F75C5	1.00	4.60	4.56	4.60
#FFFFFF	4.60	1.00	21.00	1.00
#000000	4.56	21.00	1.00	21.00
##FFFFFF	4.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#507CC8

Deuteranopia (green-blind)

#3B6FC3

Tritanopia (blue-blind)

#008793

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3f75c5;
/* rgb */ color: rgb(63, 117, 197);
/* oklch */ color: oklch(56.5% 0.137 258.2);

Tailwind

colors: {
  custom: {
    50: '#829cd7',
    500: '#3f75c5',
    950: '#000000',
  },
}

SCSS

$custom: #3f75c5;
$custom-light: #829cd7;
$custom-dark: #000000;

JSON

{
  "hex": "#3f75c5",
  "rgb": {
    "r": 63,
    "g": 117,
    "b": 197
  },
  "hsl": {
    "h": 215.821,
    "s": 53.6,
    "l": 50.98
  },
  "oklch": {
    "l": 0.56496,
    "c": 0.13698,
    "h": 258.2
  },
  "luminance": 0.17811
}

Semantic roles & 50–950 ramp

primary

#3F75C5

secondary

#CEB692

accent

#A24BDD

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0E14

muted

#7D7E83

Preview Lab

Preview with #3F75C5

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

Preview Lab → · Contrast checker → · Palette generator →