#3F74D7#3F74D7

#3F74D7 is a mid, vivid blue. Relative luminance 0.185; OKLCH L 57.4% C 0.162 H 261.6°. Best body text is #000000 at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#3F74D7
RGB	rgb(63, 116, 215)
HSL	hsl(219, 66%, 55%)
HSV	hsv(219, 71%, 84%)
CMYK	cmyk(70.7%, 46%, 0%, 15.7%)
CIE-LAB	lab(50.04, 15.48, -56.04)
CIE-LCH	lch(50.04, 58.14, 285.44°)
OKLab	oklab(57.44% -0.0238 -0.1606)
OKLCH	oklch(57.44% 0.162 261.6)
XYZ	xyz(20.5566, 18.4517, 66.7550)
Luminance	0.1845 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F74D7 #D7A23F

analogous

#3FC0D7 #3F74D7 #563FD7

triadic

#3F74D7 #D73F74 #74D73F

tetradic

#3F74D7 #D73FC0 #D7A23F #3FD756

square

#3F74D7 #D73FC0 #D7A23F #3FD756

split-complementary

#3F74D7 #D7563F #C0D73F

monochromatic

#1B3E81 #2557B3 #3F74D7 #7299E2 #A4BDEC

Accessibility & contrast

On white

4.48

#3F74D7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.69

#3F74D7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F74D7

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F74D7	#FFFFFF	#000000	##000000
##3F74D7	1.00	4.48	4.69	4.69
#FFFFFF	4.48	1.00	21.00	21.00
#000000	4.69	21.00	1.00	1.00
##000000	4.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#417FDB

Deuteranopia (green-blind)

#1F71D5

Tritanopia (blue-blind)

#008B9B

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3f74d7;
/* rgb */ color: rgb(63, 116, 215);
/* oklch */ color: oklch(57.4% 0.162 261.6);

Tailwind

colors: {
  custom: {
    50: '#869be4',
    500: '#3f74d7',
    950: '#000000',
  },
}

SCSS

$custom: #3f74d7;
$custom-light: #869be4;
$custom-dark: #000000;

JSON

{
  "hex": "#3f74d7",
  "rgb": {
    "r": 63,
    "g": 116,
    "b": 215
  },
  "hsl": {
    "h": 219.079,
    "s": 65.517,
    "l": 54.51
  },
  "oklch": {
    "l": 0.57437,
    "c": 0.16234,
    "h": 261.6
  },
  "luminance": 0.18454
}

Semantic roles & 50–950 ramp

primary

#3F74D7

secondary

#D9C399

accent

#AD3FE8

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #3F74D7

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

Preview Lab → · Contrast checker → · Palette generator →