#3F70E8#3F70E8

#3F70E8 is a mid, vivid blue. Relative luminance 0.185; OKLCH L 57.8% C 0.190 H 264.5°. Best body text is #000000 at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#3F70E8
RGB	rgb(63, 112, 232)
HSL	hsl(223, 79%, 58%)
HSV	hsv(223, 73%, 91%)
CMYK	cmyk(72.8%, 51.7%, 0%, 9%)
CIE-LAB	lab(50.06, 24.12, -65.60)
CIE-LCH	lch(50.06, 69.90, 290.19°)
OKLab	oklab(57.8% -0.0183 -0.1888)
OKLCH	oklch(57.8% 0.19 264.5)
XYZ	xyz(22.4044, 18.4689, 78.7124)
Luminance	0.1847 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F70E8 #E8B73F

analogous

#3FC4E8 #3F70E8 #633FE8

triadic

#3F70E8 #E83F70 #70E83F

tetradic

#3F70E8 #E83FC4 #E8B73F #3FE863

square

#3F70E8 #E83FC4 #E8B73F #3FE863

split-complementary

#3F70E8 #E8633F #C4E83F

monochromatic

#123A9A #194ED1 #3F70E8 #7699EF #ACC1F5

Accessibility & contrast

On white

4.47

#3F70E8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.69

#3F70E8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F70E8

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F70E8	#FFFFFF	#000000	##000000
##3F70E8	1.00	4.47	4.69	4.69
#FFFFFF	4.47	1.00	21.00	21.00
#000000	4.69	21.00	1.00	1.00
##000000	4.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E7FEC

Deuteranopia (green-blind)

#0070E6

Tritanopia (blue-blind)

#008DA1

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3f70e8;
/* rgb */ color: rgb(63, 112, 232);
/* oklch */ color: oklch(57.8% 0.190 264.5);

Tailwind

colors: {
  custom: {
    50: '#8998f0',
    500: '#3f70e8',
    950: '#000000',
  },
}

SCSS

$custom: #3f70e8;
$custom-light: #8998f0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f70e8",
  "rgb": {
    "r": 63,
    "g": 112,
    "b": 232
  },
  "hsl": {
    "h": 222.604,
    "s": 78.605,
    "l": 57.843
  },
  "oklch": {
    "l": 0.57803,
    "c": 0.18966,
    "h": 264.5
  },
  "luminance": 0.18471
}

Semantic roles & 50–950 ramp

primary

#3F70E8

secondary

#E3D0A0

accent

#BD33F5

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0D0D17

muted

#7E7E85

Preview Lab

Preview with #3F70E8

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

Preview Lab → · Contrast checker → · Palette generator →