#3F74E2#3F74E2

#3F74E2 is a mid, vivid blue. Relative luminance 0.190; OKLCH L 58.2% C 0.177 H 262.8°. Best body text is #000000 at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#3F74E2
RGB	rgb(63, 116, 226)
HSL	hsl(220, 74%, 57%)
HSV	hsv(220, 72%, 89%)
CMYK	cmyk(72.1%, 48.7%, 0%, 11.4%)
CIE-LAB	lab(50.73, 19.45, -61.15)
CIE-LCH	lch(50.73, 64.17, 287.65°)
OKLab	oklab(58.19% -0.0222 -0.1756)
OKLCH	oklch(58.19% 0.177 262.8)
XYZ	xyz(22.0179, 19.0362, 74.4507)
Luminance	0.1904 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F74E2 #E2AD3F

analogous

#3FC6E2 #3F74E2 #5C3FE2

triadic

#3F74E2 #E23F74 #74E23F

tetradic

#3F74E2 #E23FC6 #E2AD3F #3FE25C

square

#3F74E2 #E23FC6 #E2AD3F #3FE25C

split-complementary

#3F74E2 #E25C3F #C6E23F

monochromatic

#163E91 #1E55C6 #3F74E2 #749AEA #A9C1F2

Accessibility & contrast

On white

4.37

#3F74E2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.81

#3F74E2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F74E2

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F74E2	#FFFFFF	#000000	##000000
##3F74E2	1.00	4.37	4.81	4.81
#FFFFFF	4.37	1.00	21.00	21.00
#000000	4.81	21.00	1.00	1.00
##000000	4.81	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3581E6

Deuteranopia (green-blind)

#0072E0

Tritanopia (blue-blind)

#008EA0

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #3f74e2;
/* rgb */ color: rgb(63, 116, 226);
/* oklch */ color: oklch(58.2% 0.177 262.8);

Tailwind

colors: {
  custom: {
    50: '#889bec',
    500: '#3f74e2',
    950: '#000000',
  },
}

SCSS

$custom: #3f74e2;
$custom-light: #889bec;
$custom-dark: #000000;

JSON

{
  "hex": "#3f74e2",
  "rgb": {
    "r": 63,
    "g": 116,
    "b": 226
  },
  "hsl": {
    "h": 220.491,
    "s": 73.756,
    "l": 56.667
  },
  "oklch": {
    "l": 0.58187,
    "c": 0.177,
    "h": 262.8
  },
  "luminance": 0.19039
}

Semantic roles & 50–950 ramp

primary

#3F74E2

secondary

#E0CA9D

accent

#B437F0

background

#F9F9FE

surface

#F1F2FD

border

#CBCCD5

text

#0D0E16

muted

#7E7E84

Preview Lab

Preview with #3F74E2

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

Preview Lab → · Contrast checker → · Palette generator →