#3F54C8#3F54C8

#3F54C8 is a mid, vivid blue. Relative luminance 0.116; OKLCH L 49.9% C 0.181 H 270.6°. Best body text is #FFFFFF at 6.34:1 contrast (WCAG AA passes).

Color values

HEX	#3F54C8
RGB	rgb(63, 84, 200)
HSL	hsl(231, 55%, 52%)
HSV	hsv(231, 69%, 78%)
CMYK	cmyk(68.5%, 58%, 0%, 21.6%)
CIE-LAB	lab(40.52, 30.39, -62.83)
CIE-LCH	lch(40.52, 69.80, 295.81°)
OKLab	oklab(49.9% 0.0019 -0.181)
OKLCH	oklch(49.9% 0.181 270.6)
XYZ	xyz(15.6420, 11.5660, 56.0405)
Luminance	0.1157 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F54C8 #C8B33F

analogous

#3F99C8 #3F54C8 #6F3FC8

triadic

#3F54C8 #C83F54 #54C83F

tetradic

#3F54C8 #C83F99 #C8B33F #3FC86F

square

#3F54C8 #C83F99 #C8B33F #3FC86F

split-complementary

#3F54C8 #C86F3F #99C83F

monochromatic

#1F2B6D #2D3E9D #3F54C8 #6F7ED6 #9EA9E3

Accessibility & contrast

On white

6.34

#3F54C8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.31

#3F54C8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F54C8

6.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F54C8	#FFFFFF	#000000	##FFFFFF
##3F54C8	1.00	6.34	3.31	6.34
#FFFFFF	6.34	1.00	21.00	1.00
#000000	3.31	21.00	1.00	21.00
##FFFFFF	6.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0066CC

Deuteranopia (green-blind)

#0059C6

Tritanopia (blue-blind)

#007186

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #3f54c8;
/* rgb */ color: rgb(63, 84, 200);
/* oklch */ color: oklch(49.9% 0.181 270.6);

Tailwind

colors: {
  custom: {
    50: '#8483da',
    500: '#3f54c8',
    950: '#000000',
  },
}

SCSS

$custom: #3f54c8;
$custom-light: #8483da;
$custom-dark: #000000;

JSON

{
  "hex": "#3f54c8",
  "rgb": {
    "r": 63,
    "g": 84,
    "b": 200
  },
  "hsl": {
    "h": 230.803,
    "s": 55.466,
    "l": 51.569
  },
  "oklch": {
    "l": 0.49897,
    "c": 0.18106,
    "h": 270.6
  },
  "luminance": 0.11568
}

Semantic roles & 50–950 ramp

primary

#3F54C8

secondary

#D0C693

accent

#C849DF

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0A15

muted

#7D7C83

Preview Lab

Preview with #3F54C8

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

Preview Lab → · Contrast checker → · Palette generator →