#3F74CE#3F74CE

#3F74CE is a mid, vivid blue. Relative luminance 0.180; OKLCH L 56.8% C 0.150 H 260.3°. Best body text is #000000 at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#3F74CE
RGB	rgb(63, 116, 206)
HSL	hsl(218, 59%, 53%)
HSV	hsv(218, 69%, 81%)
CMYK	cmyk(69.4%, 43.7%, 0%, 19.2%)
CIE-LAB	lab(49.50, 12.23, -51.79)
CIE-LCH	lch(49.50, 53.22, 283.29°)
OKLab	oklab(56.85% -0.0253 -0.1481)
OKLCH	oklch(56.85% 0.15 260.3)
XYZ	xyz(19.4319, 18.0018, 60.8312)
Luminance	0.1800 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F74CE #CE993F

analogous

#3FBCCE #3F74CE #513FCE

triadic

#3F74CE #CE3F74 #74CE3F

tetradic

#3F74CE #CE3FBC #CE993F #3FCE51

square

#3F74CE #CE3FBC #CE993F #3FCE51

split-complementary

#3F74CE #CE513F #BCCE3F

monochromatic

#1E3E75 #2A58A6 #3F74CE #7097DA #A1BBE7

Accessibility & contrast

On white

4.56

#3F74CE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.60

#3F74CE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F74CE

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F74CE	#FFFFFF	#000000	##000000
##3F74CE	1.00	4.56	4.60	4.60
#FFFFFF	4.56	1.00	21.00	21.00
#000000	4.60	21.00	1.00	1.00
##000000	4.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#487DD1

Deuteranopia (green-blind)

#2E70CC

Tritanopia (blue-blind)

#008997

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3f74ce;
/* rgb */ color: rgb(63, 116, 206);
/* oklch */ color: oklch(56.8% 0.150 260.3);

Tailwind

colors: {
  custom: {
    50: '#849bdd',
    500: '#3f74ce',
    950: '#000000',
  },
}

SCSS

$custom: #3f74ce;
$custom-light: #849bdd;
$custom-dark: #000000;

JSON

{
  "hex": "#3f74ce",
  "rgb": {
    "r": 63,
    "g": 116,
    "b": 206
  },
  "hsl": {
    "h": 217.762,
    "s": 59.336,
    "l": 52.745
  },
  "oklch": {
    "l": 0.56845,
    "c": 0.15024,
    "h": 260.3
  },
  "luminance": 0.18004
}

Semantic roles & 50–950 ramp

primary

#3F74CE

secondary

#D3BC95

accent

#A845E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F74CE

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

Preview Lab → · Contrast checker → · Palette generator →