#3F70DE#3F70DE

#3F70DE is a mid, vivid blue. Relative luminance 0.179; OKLCH L 57.1% C 0.176 H 263.7°. Best body text is #000000 at 4.58:1 contrast (WCAG AA passes).

Color values

HEX	#3F70DE
RGB	rgb(63, 112, 222)
HSL	hsl(222, 71%, 56%)
HSV	hsv(222, 72%, 87%)
CMYK	cmyk(71.6%, 49.5%, 0%, 12.9%)
CIE-LAB	lab(49.40, 20.51, -61.04)
CIE-LCH	lch(49.40, 64.40, 288.57°)
OKLab	oklab(57.08% -0.0194 -0.1754)
OKLCH	oklch(57.08% 0.176 263.7)
XYZ	xyz(21.0242, 17.9168, 71.4433)
Luminance	0.1792 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F70DE #DEAD3F

analogous

#3FC0DE #3F70DE #5D3FDE

triadic

#3F70DE #DE3F70 #70DE3F

tetradic

#3F70DE #DE3FC0 #DEAD3F #3FDE5D

square

#3F70DE #DE3FC0 #DEAD3F #3FDE5D

split-complementary

#3F70DE #DE5D3F #C0DE3F

monochromatic

#183B8B #2152BF #3F70DE #7397E7 #A7BEF0

Accessibility & contrast

On white

4.58

#3F70DE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.58

#3F70DE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F70DE

4.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F70DE	#FFFFFF	#000000	##000000
##3F70DE	1.00	4.58	4.58	4.58
#FFFFFF	4.58	1.00	21.00	21.00
#000000	4.58	21.00	1.00	1.00
##000000	4.58	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F7DE2

Deuteranopia (green-blind)

#006FDC

Tritanopia (blue-blind)

#008A9C

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3f70de;
/* rgb */ color: rgb(63, 112, 222);
/* oklch */ color: oklch(57.1% 0.176 263.7);

Tailwind

colors: {
  custom: {
    50: '#8798e9',
    500: '#3f70de',
    950: '#000000',
  },
}

SCSS

$custom: #3f70de;
$custom-light: #8798e9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f70de",
  "rgb": {
    "r": 63,
    "g": 112,
    "b": 222
  },
  "hsl": {
    "h": 221.509,
    "s": 70.667,
    "l": 55.882
  },
  "oklch": {
    "l": 0.57085,
    "c": 0.17643,
    "h": 263.7
  },
  "luminance": 0.17919
}

Semantic roles & 50–950 ramp

primary

#3F70DE

secondary

#DDC99B

accent

#B63AED

background

#F9F9FE

surface

#F1F2FD

border

#CBCCD5

text

#0D0D16

muted

#7E7E84

Preview Lab

Preview with #3F70DE

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

Preview Lab → · Contrast checker → · Palette generator →