#3F70D8#3F70D8

#3F70D8 is a mid, vivid blue. Relative luminance 0.176; OKLCH L 56.7% C 0.168 H 263.1°. Best body text is #FFFFFF at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#3F70D8
RGB	rgb(63, 112, 216)
HSL	hsl(221, 66%, 55%)
HSV	hsv(221, 71%, 85%)
CMYK	cmyk(70.8%, 48.1%, 0%, 15.3%)
CIE-LAB	lab(49.01, 18.34, -58.27)
CIE-LCH	lch(49.01, 61.09, 287.47°)
OKLab	oklab(56.67% -0.0202 -0.1672)
OKLCH	oklch(56.67% 0.168 263.1)
XYZ	xyz(20.2343, 17.6008, 67.2833)
Luminance	0.1760 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F70D8 #D8A73F

analogous

#3FBDD8 #3F70D8 #5A3FD8

triadic

#3F70D8 #D83F70 #70D83F

tetradic

#3F70D8 #D83FBD #D8A73F #3FD85A

square

#3F70D8 #D83FBD #D8A73F #3FD85A

split-complementary

#3F70D8 #D85A3F #BDD83F

monochromatic

#1A3C82 #2553B5 #3F70D8 #7296E2 #A5BCED

Accessibility & contrast

On white

4.65

#3F70D8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.52

#3F70D8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3F70D8

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F70D8	#FFFFFF	#000000	##FFFFFF
##3F70D8	1.00	4.65	4.52	4.65
#FFFFFF	4.65	1.00	21.00	1.00
#000000	4.52	21.00	1.00	21.00
##FFFFFF	4.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#367CDC

Deuteranopia (green-blind)

#046ED6

Tritanopia (blue-blind)

#00899A

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3f70d8;
/* rgb */ color: rgb(63, 112, 216);
/* oklch */ color: oklch(56.7% 0.168 263.1);

Tailwind

colors: {
  custom: {
    50: '#8698e5',
    500: '#3f70d8',
    950: '#000000',
  },
}

SCSS

$custom: #3f70d8;
$custom-light: #8698e5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f70d8",
  "rgb": {
    "r": 63,
    "g": 112,
    "b": 216
  },
  "hsl": {
    "h": 220.784,
    "s": 66.234,
    "l": 54.706
  },
  "oklch": {
    "l": 0.56666,
    "c": 0.16841,
    "h": 263.1
  },
  "luminance": 0.17603
}

Semantic roles & 50–950 ramp

primary

#3F70D8

secondary

#DAC599

accent

#B33FE9

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0D0D16

muted

#7D7E84

Preview Lab

Preview with #3F70D8

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

Preview Lab → · Contrast checker → · Palette generator →