#3F74CD#3F74CD

#3F74CD is a mid, vivid blue. Relative luminance 0.180; OKLCH L 56.8% C 0.149 H 260.1°. Best body text is #000000 at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#3F74CD
RGB	rgb(63, 116, 205)
HSL	hsl(218, 59%, 53%)
HSV	hsv(218, 69%, 80%)
CMYK	cmyk(69.3%, 43.4%, 0%, 19.6%)
CIE-LAB	lab(49.44, 11.87, -51.32)
CIE-LCH	lch(49.44, 52.67, 283.03°)
OKLab	oklab(56.78% -0.0255 -0.1467)
OKLCH	oklch(56.78% 0.149 260.1)
XYZ	xyz(19.3108, 17.9533, 60.1934)
Luminance	0.1795 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F74CD #CD983F

analogous

#3FBBCD #3F74CD #513FCD

triadic

#3F74CD #CD3F74 #74CD3F

tetradic

#3F74CD #CD3FBB #CD983F #3FCD51

square

#3F74CD #CD3FBB #CD983F #3FCD51

split-complementary

#3F74CD #CD513F #BBCD3F

monochromatic

#1E3E74 #2B58A4 #3F74CD #7097DA #A0BAE6

Accessibility & contrast

On white

4.57

#3F74CD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.59

#3F74CD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F74CD

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F74CD	#FFFFFF	#000000	##000000
##3F74CD	1.00	4.57	4.59	4.59
#FFFFFF	4.57	1.00	21.00	21.00
#000000	4.59	21.00	1.00	1.00
##000000	4.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#497DD0

Deuteranopia (green-blind)

#306FCB

Tritanopia (blue-blind)

#008996

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3f74cd;
/* rgb */ color: rgb(63, 116, 205);
/* oklch */ color: oklch(56.8% 0.149 260.1);

Tailwind

colors: {
  custom: {
    50: '#849bdd',
    500: '#3f74cd',
    950: '#000000',
  },
}

SCSS

$custom: #3f74cd;
$custom-light: #849bdd;
$custom-dark: #000000;

JSON

{
  "hex": "#3f74cd",
  "rgb": {
    "r": 63,
    "g": 116,
    "b": 205
  },
  "hsl": {
    "h": 217.606,
    "s": 58.678,
    "l": 52.549
  },
  "oklch": {
    "l": 0.56781,
    "c": 0.14889,
    "h": 260.1
  },
  "luminance": 0.17955
}

Semantic roles & 50–950 ramp

primary

#3F74CD

secondary

#D3BC95

accent

#A846E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F74CD

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

Preview Lab → · Contrast checker → · Palette generator →