#3F74C4#3F74C4

#3F74C4 is a mid, vivid blue. Relative luminance 0.175; OKLCH L 56.2% C 0.137 H 258.5°. Best body text is #FFFFFF at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#3F74C4
RGB	rgb(63, 116, 196)
HSL	hsl(216, 53%, 51%)
HSV	hsv(216, 68%, 77%)
CMYK	cmyk(67.9%, 40.8%, 0%, 23.1%)
CIE-LAB	lab(48.92, 8.65, -46.99)
CIE-LCH	lch(48.92, 47.78, 280.42°)
OKLab	oklab(56.21% -0.0273 -0.134)
OKLCH	oklch(56.21% 0.137 258.5)
XYZ	xyz(18.2555, 17.5312, 54.6356)
Luminance	0.1753 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F74C4 #C48F3F

analogous

#3FB6C4 #3F74C4 #4C3FC4

triadic

#3F74C4 #C43F74 #74C43F

tetradic

#3F74C4 #C43FB6 #C48F3F #3FC44C

square

#3F74C4 #C43FB6 #C48F3F #3FC44C

split-complementary

#3F74C4 #C44C3F #B6C43F

monochromatic

#203D68 #2E5897 #3F74C4 #6E96D2 #9DB8E1

Accessibility & contrast

On white

4.66

#3F74C4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.51

#3F74C4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3F74C4

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F74C4	#FFFFFF	#000000	##FFFFFF
##3F74C4	1.00	4.66	4.51	4.66
#FFFFFF	4.66	1.00	21.00	1.00
#000000	4.51	21.00	1.00	21.00
##FFFFFF	4.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F7BC7

Deuteranopia (green-blind)

#3A6FC2

Tritanopia (blue-blind)

#008692

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3f74c4;
/* rgb */ color: rgb(63, 116, 196);
/* oklch */ color: oklch(56.2% 0.137 258.5);

Tailwind

colors: {
  custom: {
    50: '#829bd6',
    500: '#3f74c4',
    950: '#000000',
  },
}

SCSS

$custom: #3f74c4;
$custom-light: #829bd6;
$custom-dark: #000000;

JSON

{
  "hex": "#3f74c4",
  "rgb": {
    "r": 63,
    "g": 116,
    "b": 196
  },
  "hsl": {
    "h": 216.09,
    "s": 52.988,
    "l": 50.784
  },
  "oklch": {
    "l": 0.56214,
    "c": 0.13675,
    "h": 258.5
  },
  "luminance": 0.17533
}

Semantic roles & 50–950 ramp

primary

#3F74C4

secondary

#CDB592

accent

#A34BDC

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0E14

muted

#7D7E83

Preview Lab

Preview with #3F74C4

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

Preview Lab → · Contrast checker → · Palette generator →