#3F75DF#3F75DF

#3F75DF is a mid, vivid blue. Relative luminance 0.191; OKLCH L 58.2% C 0.172 H 262.2°. Best body text is #000000 at 4.82:1 contrast (WCAG AA passes).

Color values

HEX	#3F75DF
RGB	rgb(63, 117, 223)
HSL	hsl(220, 71%, 56%)
HSV	hsv(220, 72%, 87%)
CMYK	cmyk(71.7%, 47.5%, 0%, 12.5%)
CIE-LAB	lab(50.81, 17.74, -59.33)
CIE-LCH	lch(50.81, 61.92, 286.65°)
OKLab	oklab(58.19% -0.0234 -0.1702)
OKLCH	oklch(58.19% 0.172 262.2)
XYZ	xyz(21.7257, 19.1047, 72.3403)
Luminance	0.1911 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F75DF #DFA93F

analogous

#3FC5DF #3F75DF #593FDF

triadic

#3F75DF #DF3F75 #75DF3F

tetradic

#3F75DF #DF3FC5 #DFA93F #3FDF59

square

#3F75DF #DF3FC5 #DFA93F #3FDF59

split-complementary

#3F75DF #DF593F #C5DF3F

monochromatic

#173F8C #2056C1 #3F75DF #739BE8 #A8C0F0

Accessibility & contrast

On white

4.36

#3F75DF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.82

#3F75DF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F75DF

4.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F75DF	#FFFFFF	#000000	##000000
##3F75DF	1.00	4.36	4.82	4.82
#FFFFFF	4.36	1.00	21.00	21.00
#000000	4.82	21.00	1.00	1.00
##000000	4.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B81E3

Deuteranopia (green-blind)

#0A72DD

Tritanopia (blue-blind)

#008E9F

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #3f75df;
/* rgb */ color: rgb(63, 117, 223);
/* oklch */ color: oklch(58.2% 0.172 262.2);

Tailwind

colors: {
  custom: {
    50: '#879cea',
    500: '#3f75df',
    950: '#000000',
  },
}

SCSS

$custom: #3f75df;
$custom-light: #879cea;
$custom-dark: #000000;

JSON

{
  "hex": "#3f75df",
  "rgb": {
    "r": 63,
    "g": 117,
    "b": 223
  },
  "hsl": {
    "h": 219.75,
    "s": 71.429,
    "l": 56.078
  },
  "oklch": {
    "l": 0.58187,
    "c": 0.17183,
    "h": 262.2
  },
  "luminance": 0.19107
}

Semantic roles & 50–950 ramp

primary

#3F75DF

secondary

#DEC89C

accent

#B13AEE

background

#F9F9FE

surface

#F1F2FD

border

#CBCCD5

text

#0D0E16

muted

#7E7E84

Preview Lab

Preview with #3F75DF

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

Preview Lab → · Contrast checker → · Palette generator →