#3F68CB#3F68CB

#3F68CB is a mid, vivid blue. Relative luminance 0.153; OKLCH L 54.1% C 0.160 H 264.7°. Best body text is #FFFFFF at 5.18:1 contrast (WCAG AA passes).

Color values

HEX	#3F68CB
RGB	rgb(63, 104, 203)
HSL	hsl(222, 57%, 52%)
HSV	hsv(222, 69%, 80%)
CMYK	cmyk(69%, 48.8%, 0%, 20.4%)
CIE-LAB	lab(46.00, 18.70, -55.70)
CIE-LCH	lch(46.00, 58.75, 288.56°)
OKLab	oklab(54.1% -0.0149 -0.1598)
OKLCH	oklch(54.1% 0.16 264.7)
XYZ	xyz(17.7759, 15.2674, 58.4984)
Luminance	0.1527 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F68CB #CBA23F

analogous

#3FAECB #3F68CB #5C3FCB

triadic

#3F68CB #CB3F68 #68CB3F

tetradic

#3F68CB #CB3FAE #CBA23F #3FCB5C

square

#3F68CB #CB3FAE #CBA23F #3FCB5C

split-complementary

#3F68CB #CB5C3F #AECB3F

monochromatic

#1F3771 #2C4EA1 #3F68CB #6F8ED8 #9FB4E5

Accessibility & contrast

On white

5.18

#3F68CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.05

#3F68CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F68CB

5.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F68CB	#FFFFFF	#000000	##FFFFFF
##3F68CB	1.00	5.18	4.05	5.18
#FFFFFF	5.18	1.00	21.00	1.00
#000000	4.05	21.00	1.00	21.00
##FFFFFF	5.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3174CF

Deuteranopia (green-blind)

#0467C9

Tritanopia (blue-blind)

#007F90

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #3f68cb;
/* rgb */ color: rgb(63, 104, 203);
/* oklch */ color: oklch(54.1% 0.160 264.7);

Tailwind

colors: {
  custom: {
    50: '#8492db',
    500: '#3f68cb',
    950: '#000000',
  },
}

SCSS

$custom: #3f68cb;
$custom-light: #8492db;
$custom-dark: #000000;

JSON

{
  "hex": "#3f68cb",
  "rgb": {
    "r": 63,
    "g": 104,
    "b": 203
  },
  "hsl": {
    "h": 222.429,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.54099,
    "c": 0.16045,
    "h": 264.7
  },
  "luminance": 0.15269
}

Semantic roles & 50–950 ramp

primary

#3F68CB

secondary

#D1C094

accent

#B447E1

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0D15

muted

#7D7D83

Preview Lab

Preview with #3F68CB

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

Preview Lab → · Contrast checker → · Palette generator →