#3F70CA#3F70CA

#3F70CA is a mid, vivid blue. Relative luminance 0.169; OKLCH L 55.7% C 0.149 H 261.4°. Best body text is #FFFFFF at 4.79:1 contrast (WCAG AA passes).

Color values

HEX	#3F70CA
RGB	rgb(63, 112, 202)
HSL	hsl(219, 57%, 52%)
HSV	hsv(219, 69%, 79%)
CMYK	cmyk(68.8%, 44.6%, 0%, 20.8%)
CIE-LAB	lab(48.14, 13.29, -51.68)
CIE-LCH	lch(48.14, 53.36, 284.42°)
OKLab	oklab(55.72% -0.0223 -0.1478)
OKLCH	oklch(55.72% 0.149 261.4)
XYZ	xyz(18.5009, 16.9075, 58.1541)
Luminance	0.1691 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F70CA #CA993F

analogous

#3FB6CA #3F70CA #543FCA

triadic

#3F70CA #CA3F70 #70CA3F

tetradic

#3F70CA #CA3FB6 #CA993F #3FCA54

square

#3F70CA #CA3FB6 #CA993F #3FCA54

split-complementary

#3F70CA #CA543F #B6CA3F

monochromatic

#1F3B70 #2C55A0 #3F70CA #6F94D7 #9FB7E4

Accessibility & contrast

On white

4.79

#3F70CA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.38

#3F70CA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F70CA

4.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F70CA	#FFFFFF	#000000	##FFFFFF
##3F70CA	1.00	4.79	4.38	4.79
#FFFFFF	4.79	1.00	21.00	1.00
#000000	4.38	21.00	1.00	21.00
##FFFFFF	4.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4479CD

Deuteranopia (green-blind)

#2A6CC8

Tritanopia (blue-blind)

#008593

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3f70ca;
/* rgb */ color: rgb(63, 112, 202);
/* oklch */ color: oklch(55.7% 0.149 261.4);

Tailwind

colors: {
  custom: {
    50: '#8498db',
    500: '#3f70ca',
    950: '#000000',
  },
}

SCSS

$custom: #3f70ca;
$custom-light: #8498db;
$custom-dark: #000000;

JSON

{
  "hex": "#3f70ca",
  "rgb": {
    "r": 63,
    "g": 112,
    "b": 202
  },
  "hsl": {
    "h": 218.849,
    "s": 56.735,
    "l": 51.961
  },
  "oklch": {
    "l": 0.55724,
    "c": 0.14949,
    "h": 261.4
  },
  "luminance": 0.16909
}

Semantic roles & 50–950 ramp

primary

#3F70CA

secondary

#D1BB94

accent

#AA48E0

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3F70CA

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

Preview Lab → · Contrast checker → · Palette generator →