#3F70D5#3F70D5

#3F70D5 is a mid, vivid blue. Relative luminance 0.174; OKLCH L 56.5% C 0.164 H 262.8°. Best body text is #FFFFFF at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#3F70D5
RGB	rgb(63, 112, 213)
HSL	hsl(220, 64%, 54%)
HSV	hsv(220, 70%, 84%)
CMYK	cmyk(70.4%, 47.4%, 0%, 16.5%)
CIE-LAB	lab(48.82, 17.26, -56.87)
CIE-LCH	lch(48.82, 59.43, 286.88°)
OKLab	oklab(56.46% -0.0206 -0.1631)
OKLCH	oklch(56.46% 0.164 262.8)
XYZ	xyz(19.8500, 17.4471, 65.2594)
Luminance	0.1745 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F70D5 #D5A43F

analogous

#3FBBD5 #3F70D5 #593FD5

triadic

#3F70D5 #D53F70 #70D53F

tetradic

#3F70D5 #D53FBB #D5A43F #3FD559

square

#3F70D5 #D53FBB #D5A43F #3FD559

split-complementary

#3F70D5 #D5593F #BBD53F

monochromatic

#1C3C7E #2754B0 #3F70D5 #7195E0 #A3BBEB

Accessibility & contrast

On white

4.68

#3F70D5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.49

#3F70D5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F70D5

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F70D5	#FFFFFF	#000000	##FFFFFF
##3F70D5	1.00	4.68	4.49	4.68
#FFFFFF	4.68	1.00	21.00	1.00
#000000	4.49	21.00	1.00	21.00
##FFFFFF	4.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A7BD9

Deuteranopia (green-blind)

#126ED3

Tritanopia (blue-blind)

#008898

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3f70d5;
/* rgb */ color: rgb(63, 112, 213);
/* oklch */ color: oklch(56.5% 0.164 262.8);

Tailwind

colors: {
  custom: {
    50: '#8698e2',
    500: '#3f70d5',
    950: '#000000',
  },
}

SCSS

$custom: #3f70d5;
$custom-light: #8698e2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f70d5",
  "rgb": {
    "r": 63,
    "g": 112,
    "b": 213
  },
  "hsl": {
    "h": 220.4,
    "s": 64.103,
    "l": 54.118
  },
  "oklch": {
    "l": 0.5646,
    "c": 0.16438,
    "h": 262.8
  },
  "luminance": 0.17449
}

Semantic roles & 50–950 ramp

primary

#3F70D5

secondary

#D8C398

accent

#B141E7

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3F70D5

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

Preview Lab → · Contrast checker → · Palette generator →