#3F75E8#3F75E8

#3F75E8 is a mid, vivid blue. Relative luminance 0.196; OKLCH L 58.8% C 0.184 H 263.0°. Best body text is #000000 at 4.92:1 contrast (WCAG AA passes).

Color values

HEX	#3F75E8
RGB	rgb(63, 117, 232)
HSL	hsl(221, 79%, 58%)
HSV	hsv(221, 73%, 91%)
CMYK	cmyk(72.8%, 49.6%, 0%, 9%)
CIE-LAB	lab(51.39, 20.99, -63.46)
CIE-LCH	lch(51.39, 66.84, 288.31°)
OKLab	oklab(58.81% -0.0222 -0.1824)
OKLCH	oklch(58.81% 0.184 263)
XYZ	xyz(22.9715, 19.6030, 78.9014)
Luminance	0.1961 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F75E8 #E8B23F

analogous

#3FCAE8 #3F75E8 #5D3FE8

triadic

#3F75E8 #E83F75 #75E83F

tetradic

#3F75E8 #E83FCA #E8B23F #3FE85D

square

#3F75E8 #E83FCA #E8B23F #3FE85D

split-complementary

#3F75E8 #E85D3F #CAE83F

monochromatic

#123E9A #1954D1 #3F75E8 #769CEF #ACC4F5

Accessibility & contrast

On white

4.27

#3F75E8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.92

#3F75E8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F75E8

4.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F75E8	#FFFFFF	#000000	##000000
##3F75E8	1.00	4.27	4.92	4.92
#FFFFFF	4.27	1.00	21.00	21.00
#000000	4.92	21.00	1.00	1.00
##000000	4.92	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3083EC

Deuteranopia (green-blind)

#0073E6

Tritanopia (blue-blind)

#0090A3

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3f75e8;
/* rgb */ color: rgb(63, 117, 232);
/* oklch */ color: oklch(58.8% 0.184 263.0);

Tailwind

colors: {
  custom: {
    50: '#899cf0',
    500: '#3f75e8',
    950: '#000000',
  },
}

SCSS

$custom: #3f75e8;
$custom-light: #899cf0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f75e8",
  "rgb": {
    "r": 63,
    "g": 117,
    "b": 232
  },
  "hsl": {
    "h": 220.828,
    "s": 78.605,
    "l": 57.843
  },
  "oklch": {
    "l": 0.58812,
    "c": 0.18374,
    "h": 263
  },
  "luminance": 0.19606
}

Semantic roles & 50–950 ramp

primary

#3F75E8

secondary

#E3CEA0

accent

#B733F5

background

#F9F9FE

surface

#F1F2FD

border

#CBCCD5

text

#0D0E17

muted

#7E7E85

Preview Lab

Preview with #3F75E8

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

Preview Lab → · Contrast checker → · Palette generator →