#3F74C3#3F74C3

#3F74C3 is a mid, vivid blue. Relative luminance 0.175; OKLCH L 56.2% C 0.135 H 258.3°. Best body text is #FFFFFF at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#3F74C3
RGB	rgb(63, 116, 195)
HSL	hsl(216, 52%, 51%)
HSV	hsv(216, 68%, 76%)
CMYK	cmyk(67.7%, 40.5%, 0%, 23.5%)
CIE-LAB	lab(48.87, 8.29, -46.51)
CIE-LCH	lch(48.87, 47.24, 280.11°)
OKLab	oklab(56.15% -0.0275 -0.1326)
OKLCH	oklch(56.15% 0.135 258.3)
XYZ	xyz(18.1421, 17.4858, 54.0382)
Luminance	0.1749 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F74C3 #C38E3F

analogous

#3FB6C3 #3F74C3 #4C3FC3

triadic

#3F74C3 #C33F74 #74C33F

tetradic

#3F74C3 #C33FB6 #C38E3F #3FC34C

square

#3F74C3 #C33FB6 #C38E3F #3FC34C

split-complementary

#3F74C3 #C34C3F #B6C33F

monochromatic

#203D67 #2F5896 #3F74C3 #6E96D2 #9CB8E0

Accessibility & contrast

On white

4.67

#3F74C3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.50

#3F74C3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3F74C3

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F74C3	#FFFFFF	#000000	##FFFFFF
##3F74C3	1.00	4.67	4.50	4.67
#FFFFFF	4.67	1.00	21.00	1.00
#000000	4.50	21.00	1.00	21.00
##FFFFFF	4.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#507BC6

Deuteranopia (green-blind)

#3B6EC1

Tritanopia (blue-blind)

#008692

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3f74c3;
/* rgb */ color: rgb(63, 116, 195);
/* oklch */ color: oklch(56.2% 0.135 258.3);

Tailwind

colors: {
  custom: {
    50: '#829bd5',
    500: '#3f74c3',
    950: '#000000',
  },
}

SCSS

$custom: #3f74c3;
$custom-light: #829bd5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f74c3",
  "rgb": {
    "r": 63,
    "g": 116,
    "b": 195
  },
  "hsl": {
    "h": 215.909,
    "s": 52.381,
    "l": 50.588
  },
  "oklch": {
    "l": 0.56152,
    "c": 0.1354,
    "h": 258.3
  },
  "luminance": 0.17488
}

Semantic roles & 50–950 ramp

primary

#3F74C3

secondary

#CCB592

accent

#A24CDC

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0E14

muted

#7D7E83

Preview Lab

Preview with #3F74C3

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

Preview Lab → · Contrast checker → · Palette generator →