#3F74D1#3F74D1

#3F74D1 is a mid, vivid blue. Relative luminance 0.182; OKLCH L 57.0% C 0.154 H 260.8°. Best body text is #000000 at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#3F74D1
RGB	rgb(63, 116, 209)
HSL	hsl(218, 61%, 53%)
HSV	hsv(218, 70%, 82%)
CMYK	cmyk(69.9%, 44.5%, 0%, 18%)
CIE-LAB	lab(49.68, 13.31, -53.22)
CIE-LCH	lch(49.68, 54.86, 284.04°)
OKLab	oklab(57.04% -0.0248 -0.1523)
OKLCH	oklch(57.04% 0.154 260.8)
XYZ	xyz(19.7998, 18.1489, 62.7689)
Luminance	0.1815 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F74D1 #D19C3F

analogous

#3FBDD1 #3F74D1 #533FD1

triadic

#3F74D1 #D13F74 #74D13F

tetradic

#3F74D1 #D13FBD #D19C3F #3FD153

square

#3F74D1 #D13FBD #D19C3F #3FD153

split-complementary

#3F74D1 #D1533F #BDD13F

monochromatic

#1D3E79 #2958AA #3F74D1 #7098DD #A2BBE9

Accessibility & contrast

On white

4.54

#3F74D1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.63

#3F74D1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F74D1

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F74D1	#FFFFFF	#000000	##000000
##3F74D1	1.00	4.54	4.63	4.63
#FFFFFF	4.54	1.00	21.00	21.00
#000000	4.63	21.00	1.00	1.00
##000000	4.63	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#467DD5

Deuteranopia (green-blind)

#2A70CF

Tritanopia (blue-blind)

#008A98

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3f74d1;
/* rgb */ color: rgb(63, 116, 209);
/* oklch */ color: oklch(57.0% 0.154 260.8);

Tailwind

colors: {
  custom: {
    50: '#859be0',
    500: '#3f74d1',
    950: '#000000',
  },
}

SCSS

$custom: #3f74d1;
$custom-light: #859be0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f74d1",
  "rgb": {
    "r": 63,
    "g": 116,
    "b": 209
  },
  "hsl": {
    "h": 218.219,
    "s": 61.345,
    "l": 53.333
  },
  "oklch": {
    "l": 0.5704,
    "c": 0.15428,
    "h": 260.8
  },
  "luminance": 0.18151
}

Semantic roles & 50–950 ramp

primary

#3F74D1

secondary

#D5BE97

accent

#AA43E4

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F74D1

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

Preview Lab → · Contrast checker → · Palette generator →