#3F74C2#3F74C2

#3F74C2 is a mid, vivid blue. Relative luminance 0.174; OKLCH L 56.1% C 0.134 H 258.1°. Best body text is #FFFFFF at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#3F74C2
RGB	rgb(63, 116, 194)
HSL	hsl(216, 52%, 50%)
HSV	hsv(216, 68%, 76%)
CMYK	cmyk(67.5%, 40.2%, 0%, 23.9%)
CIE-LAB	lab(48.81, 7.93, -46.02)
CIE-LCH	lch(48.81, 46.70, 279.78°)
OKLab	oklab(56.09% -0.0277 -0.1311)
OKLCH	oklch(56.09% 0.134 258.1)
XYZ	xyz(18.0294, 17.4408, 53.4447)
Luminance	0.1744 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F74C2 #C28D3F

analogous

#3FB6C2 #3F74C2 #4B3FC2

triadic

#3F74C2 #C23F74 #74C23F

tetradic

#3F74C2 #C23FB6 #C28D3F #3FC24B

square

#3F74C2 #C23FB6 #C28D3F #3FC24B

split-complementary

#3F74C2 #C24B3F #B6C23F

monochromatic

#203D66 #2F5895 #3F74C2 #6D96D1 #9CB7E0

Accessibility & contrast

On white

4.68

#3F74C2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.49

#3F74C2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F74C2

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F74C2	#FFFFFF	#000000	##FFFFFF
##3F74C2	1.00	4.68	4.49	4.68
#FFFFFF	4.68	1.00	21.00	1.00
#000000	4.49	21.00	1.00	21.00
##FFFFFF	4.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#507BC5

Deuteranopia (green-blind)

#3C6EC0

Tritanopia (blue-blind)

#008691

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3f74c2;
/* rgb */ color: rgb(63, 116, 194);
/* oklch */ color: oklch(56.1% 0.134 258.1);

Tailwind

colors: {
  custom: {
    50: '#829bd5',
    500: '#3f74c2',
    950: '#000000',
  },
}

SCSS

$custom: #3f74c2;
$custom-light: #829bd5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f74c2",
  "rgb": {
    "r": 63,
    "g": 116,
    "b": 194
  },
  "hsl": {
    "h": 215.725,
    "s": 51.779,
    "l": 50.392
  },
  "oklch": {
    "l": 0.5609,
    "c": 0.13405,
    "h": 258.1
  },
  "luminance": 0.17443
}

Semantic roles & 50–950 ramp

primary

#3F74C2

secondary

#CCB491

accent

#A24DDB

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0E14

muted

#7D7E83

Preview Lab

Preview with #3F74C2

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

Preview Lab → · Contrast checker → · Palette generator →