#3F70CE#3F70CE

#3F70CE is a mid, vivid blue. Relative luminance 0.171; OKLCH L 56.0% C 0.155 H 262.0°. Best body text is #FFFFFF at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#3F70CE
RGB	rgb(63, 112, 206)
HSL	hsl(219, 59%, 53%)
HSV	hsv(219, 69%, 81%)
CMYK	cmyk(69.4%, 45.6%, 0%, 19.2%)
CIE-LAB	lab(48.38, 14.73, -53.58)
CIE-LCH	lch(48.38, 55.57, 285.38°)
OKLab	oklab(55.99% -0.0217 -0.1534)
OKLCH	oklch(55.99% 0.155 262)
XYZ	xyz(18.9807, 17.0994, 60.6808)
Luminance	0.1710 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F70CE #CE9D3F

analogous

#3FB7CE #3F70CE #563FCE

triadic

#3F70CE #CE3F70 #70CE3F

tetradic

#3F70CE #CE3FB7 #CE9D3F #3FCE56

square

#3F70CE #CE3FB7 #CE9D3F #3FCE56

split-complementary

#3F70CE #CE563F #B7CE3F

monochromatic

#1E3C75 #2A54A6 #3F70CE #7094DA #A1B9E7

Accessibility & contrast

On white

4.75

#3F70CE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.42

#3F70CE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F70CE

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F70CE	#FFFFFF	#000000	##FFFFFF
##3F70CE	1.00	4.75	4.42	4.75
#FFFFFF	4.75	1.00	21.00	1.00
#000000	4.42	21.00	1.00	21.00
##FFFFFF	4.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#407AD2

Deuteranopia (green-blind)

#236DCC

Tritanopia (blue-blind)

#008695

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3f70ce;
/* rgb */ color: rgb(63, 112, 206);
/* oklch */ color: oklch(56.0% 0.155 262.0);

Tailwind

colors: {
  custom: {
    50: '#8498dd',
    500: '#3f70ce',
    950: '#000000',
  },
}

SCSS

$custom: #3f70ce;
$custom-light: #8498dd;
$custom-dark: #000000;

JSON

{
  "hex": "#3f70ce",
  "rgb": {
    "r": 63,
    "g": 112,
    "b": 206
  },
  "hsl": {
    "h": 219.441,
    "s": 59.336,
    "l": 52.745
  },
  "oklch": {
    "l": 0.55988,
    "c": 0.15492,
    "h": 262
  },
  "luminance": 0.17101
}

Semantic roles & 50–950 ramp

primary

#3F70CE

secondary

#D3BE95

accent

#AD45E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3F70CE

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

Preview Lab → · Contrast checker → · Palette generator →