#3F74C5#3F74C5

#3F74C5 is a mid, vivid blue. Relative luminance 0.176; OKLCH L 56.3% C 0.138 H 258.7°. Best body text is #FFFFFF at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#3F74C5
RGB	rgb(63, 116, 197)
HSL	hsl(216, 54%, 51%)
HSV	hsv(216, 68%, 77%)
CMYK	cmyk(68%, 41.1%, 0%, 22.7%)
CIE-LAB	lab(48.98, 9.00, -47.48)
CIE-LCH	lch(48.98, 48.32, 280.74°)
OKLab	oklab(56.28% -0.0271 -0.1354)
OKLCH	oklch(56.28% 0.138 258.7)
XYZ	xyz(18.3697, 17.5769, 55.2371)
Luminance	0.1758 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F74C5 #C5903F

analogous

#3FB7C5 #3F74C5 #4D3FC5

triadic

#3F74C5 #C53F74 #74C53F

tetradic

#3F74C5 #C53FB7 #C5903F #3FC54D

square

#3F74C5 #C53FB7 #C5903F #3FC54D

split-complementary

#3F74C5 #C54D3F #B7C53F

monochromatic

#203D6A #2E5899 #3F74C5 #6E96D3 #9DB8E1

Accessibility & contrast

On white

4.65

#3F74C5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.52

#3F74C5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3F74C5

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F74C5	#FFFFFF	#000000	##FFFFFF
##3F74C5	1.00	4.65	4.52	4.65
#FFFFFF	4.65	1.00	21.00	1.00
#000000	4.52	21.00	1.00	21.00
##FFFFFF	4.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E7BC8

Deuteranopia (green-blind)

#396FC3

Tritanopia (blue-blind)

#008793

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3f74c5;
/* rgb */ color: rgb(63, 116, 197);
/* oklch */ color: oklch(56.3% 0.138 258.7);

Tailwind

colors: {
  custom: {
    50: '#839bd7',
    500: '#3f74c5',
    950: '#000000',
  },
}

SCSS

$custom: #3f74c5;
$custom-light: #839bd7;
$custom-dark: #000000;

JSON

{
  "hex": "#3f74c5",
  "rgb": {
    "r": 63,
    "g": 116,
    "b": 197
  },
  "hsl": {
    "h": 216.269,
    "s": 53.6,
    "l": 50.98
  },
  "oklch": {
    "l": 0.56276,
    "c": 0.1381,
    "h": 258.7
  },
  "luminance": 0.17579
}

Semantic roles & 50–950 ramp

primary

#3F74C5

secondary

#CEB692

accent

#A34BDD

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0E14

muted

#7D7E83

Preview Lab

Preview with #3F74C5

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

Preview Lab → · Contrast checker → · Palette generator →