#3F75DA#3F75DA

#3F75DA is a mid, vivid blue. Relative luminance 0.188; OKLCH L 57.8% C 0.165 H 261.6°. Best body text is #000000 at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#3F75DA
RGB	rgb(63, 117, 218)
HSL	hsl(219, 68%, 55%)
HSV	hsv(219, 71%, 85%)
CMYK	cmyk(71.1%, 46.3%, 0%, 14.5%)
CIE-LAB	lab(50.50, 15.94, -57.00)
CIE-LCH	lch(50.50, 59.19, 285.62°)
OKLab	oklab(57.85% -0.0242 -0.1634)
OKLCH	oklch(57.85% 0.165 261.6)
XYZ	xyz(21.0616, 18.8391, 68.8424)
Luminance	0.1884 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F75DA #DAA43F

analogous

#3FC2DA #3F75DA #573FDA

triadic

#3F75DA #DA3F75 #75DA3F

tetradic

#3F75DA #DA3FC2 #DAA43F #3FDA57

square

#3F75DA #DA3FC2 #DAA43F #3FDA57

split-complementary

#3F75DA #DA573F #C2DA3F

monochromatic

#1A3F85 #2457B8 #3F75DA #729AE4 #A6BFEE

Accessibility & contrast

On white

4.40

#3F75DA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.77

#3F75DA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F75DA

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F75DA	#FFFFFF	#000000	##000000
##3F75DA	1.00	4.40	4.77	4.77
#FFFFFF	4.40	1.00	21.00	21.00
#000000	4.77	21.00	1.00	1.00
##000000	4.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4080DE

Deuteranopia (green-blind)

#1C72D8

Tritanopia (blue-blind)

#008D9D

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #3f75da;
/* rgb */ color: rgb(63, 117, 218);
/* oklch */ color: oklch(57.8% 0.165 261.6);

Tailwind

colors: {
  custom: {
    50: '#869ce6',
    500: '#3f75da',
    950: '#000000',
  },
}

SCSS

$custom: #3f75da;
$custom-light: #869ce6;
$custom-dark: #000000;

JSON

{
  "hex": "#3f75da",
  "rgb": {
    "r": 63,
    "g": 117,
    "b": 218
  },
  "hsl": {
    "h": 219.097,
    "s": 67.686,
    "l": 55.098
  },
  "oklch": {
    "l": 0.57848,
    "c": 0.16518,
    "h": 261.6
  },
  "luminance": 0.18841
}

Semantic roles & 50–950 ramp

primary

#3F75DA

secondary

#DBC49A

accent

#AE3DEB

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0D0E16

muted

#7D7E84

Preview Lab

Preview with #3F75DA

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

Preview Lab → · Contrast checker → · Palette generator →