#3F54BE#3F54BE

#3F54BE is a mid, vivid blue. Relative luminance 0.111; OKLCH L 49.1% C 0.168 H 270.6°. Best body text is #FFFFFF at 6.52:1 contrast (WCAG AA passes).

Color values

HEX	#3F54BE
RGB	rgb(63, 84, 190)
HSL	hsl(230, 50%, 50%)
HSV	hsv(230, 67%, 75%)
CMYK	cmyk(66.8%, 55.8%, 0%, 25.5%)
CIE-LAB	lab(39.77, 26.84, -58.23)
CIE-LCH	lch(39.77, 64.12, 294.75°)
OKLab	oklab(49.1% 0.0016 -0.1675)
OKLCH	oklch(49.1% 0.168 270.6)
XYZ	xyz(14.5113, 11.1138, 50.0856)
Luminance	0.1111 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F54BE #BEA93F

analogous

#3F94BE #3F54BE #6A3FBE

triadic

#3F54BE #BE3F54 #54BE3F

tetradic

#3F54BE #BE3F94 #BEA93F #3FBE6A

square

#3F54BE #BE3F94 #BEA93F #3FBE6A

split-complementary

#3F54BE #BE6A3F #94BE3F

monochromatic

#212B62 #304090 #3F54BE #6C7CCE #9AA5DD

Accessibility & contrast

On white

6.52

#3F54BE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.22

#3F54BE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F54BE

6.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F54BE	#FFFFFF	#000000	##FFFFFF
##3F54BE	1.00	6.52	3.22	6.52
#FFFFFF	6.52	1.00	21.00	1.00
#000000	3.22	21.00	1.00	21.00
##FFFFFF	6.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0064C2

Deuteranopia (green-blind)

#0058BC

Tritanopia (blue-blind)

#006E81

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #3f54be;
/* rgb */ color: rgb(63, 84, 190);
/* oklch */ color: oklch(49.1% 0.168 270.6);

Tailwind

colors: {
  custom: {
    50: '#8283d2',
    500: '#3f54be',
    950: '#000000',
  },
}

SCSS

$custom: #3f54be;
$custom-light: #8283d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f54be",
  "rgb": {
    "r": 63,
    "g": 84,
    "b": 190
  },
  "hsl": {
    "h": 230.079,
    "s": 50.198,
    "l": 49.608
  },
  "oklch": {
    "l": 0.49104,
    "c": 0.16752,
    "h": 270.6
  },
  "luminance": 0.11115
}

Semantic roles & 50–950 ramp

primary

#3F54BE

secondary

#C9C08F

accent

#C34EDA

background

#F8F8FD

surface

#F0EFFA

border

#CBCAD3

text

#0C0A14

muted

#7D7C83

Preview Lab

Preview with #3F54BE

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

Preview Lab → · Contrast checker → · Palette generator →