#3F74DA#3F74DA

#3F74DA is a mid, vivid blue. Relative luminance 0.186; OKLCH L 57.6% C 0.166 H 261.9°. Best body text is #000000 at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#3F74DA
RGB	rgb(63, 116, 218)
HSL	hsl(219, 68%, 55%)
HSV	hsv(219, 71%, 85%)
CMYK	cmyk(71.1%, 46.8%, 0%, 14.5%)
CIE-LAB	lab(50.22, 16.56, -57.44)
CIE-LCH	lch(50.22, 59.78, 286.08°)
OKLab	oklab(57.64% -0.0233 -0.1647)
OKLCH	oklch(57.64% 0.166 261.9)
XYZ	xyz(20.9457, 18.6073, 68.8038)
Luminance	0.1861 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F74DA #DAA53F

analogous

#3FC1DA #3F74DA #573FDA

triadic

#3F74DA #DA3F74 #74DA3F

tetradic

#3F74DA #DA3FC1 #DAA53F #3FDA57

square

#3F74DA #DA3FC1 #DAA53F #3FDA57

split-complementary

#3F74DA #DA573F #C1DA3F

monochromatic

#1A3E85 #2456B8 #3F74DA #7299E4 #A6BEEE

Accessibility & contrast

On white

4.45

#3F74DA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.72

#3F74DA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F74DA

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F74DA	#FFFFFF	#000000	##000000
##3F74DA	1.00	4.45	4.72	4.72
#FFFFFF	4.45	1.00	21.00	21.00
#000000	4.72	21.00	1.00	1.00
##000000	4.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E7FDE

Deuteranopia (green-blind)

#1771D8

Tritanopia (blue-blind)

#008C9C

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3f74da;
/* rgb */ color: rgb(63, 116, 218);
/* oklch */ color: oklch(57.6% 0.166 261.9);

Tailwind

colors: {
  custom: {
    50: '#869be6',
    500: '#3f74da',
    950: '#000000',
  },
}

SCSS

$custom: #3f74da;
$custom-light: #869be6;
$custom-dark: #000000;

JSON

{
  "hex": "#3f74da",
  "rgb": {
    "r": 63,
    "g": 116,
    "b": 218
  },
  "hsl": {
    "h": 219.484,
    "s": 67.686,
    "l": 55.098
  },
  "oklch": {
    "l": 0.57638,
    "c": 0.16635,
    "h": 261.9
  },
  "luminance": 0.18609
}

Semantic roles & 50–950 ramp

primary

#3F74DA

secondary

#DBC59A

accent

#AF3DEB

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0D0E16

muted

#7D7E84

Preview Lab

Preview with #3F74DA

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

Preview Lab → · Contrast checker → · Palette generator →