#3F54CE#3F54CE

#3F54CE is a mid, vivid blue. Relative luminance 0.119; OKLCH L 50.4% C 0.189 H 270.6°. Best body text is #FFFFFF at 6.23:1 contrast (WCAG AA passes).

Color values

HEX	#3F54CE
RGB	rgb(63, 84, 206)
HSL	hsl(231, 59%, 53%)
HSV	hsv(231, 69%, 81%)
CMYK	cmyk(69.4%, 59.2%, 0%, 19.2%)
CIE-LAB	lab(40.98, 32.51, -65.55)
CIE-LCH	lch(40.98, 73.17, 296.38°)
OKLab	oklab(50.39% 0.002 -0.189)
OKLCH	oklch(50.39% 0.189 270.6)
XYZ	xyz(16.3570, 11.8520, 59.8062)
Luminance	0.1185 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F54CE #CEB93F

analogous

#3F9BCE #3F54CE #723FCE

triadic

#3F54CE #CE3F54 #54CE3F

tetradic

#3F54CE #CE3F9B #CEB93F #3FCE72

square

#3F54CE #CE3F9B #CEB93F #3FCE72

split-complementary

#3F54CE #CE723F #9BCE3F

monochromatic

#1E2B75 #2A3CA6 #3F54CE #707FDA #A1ABE7

Accessibility & contrast

On white

6.23

#3F54CE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.37

#3F54CE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F54CE

6.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F54CE	#FFFFFF	#000000	##FFFFFF
##3F54CE	1.00	6.23	3.37	6.23
#FFFFFF	6.23	1.00	21.00	1.00
#000000	3.37	21.00	1.00	21.00
##FFFFFF	6.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0067D2

Deuteranopia (green-blind)

#005ACC

Tritanopia (blue-blind)

#007289

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #3f54ce;
/* rgb */ color: rgb(63, 84, 206);
/* oklch */ color: oklch(50.4% 0.189 270.6);

Tailwind

colors: {
  custom: {
    50: '#8684de',
    500: '#3f54ce',
    950: '#000000',
  },
}

SCSS

$custom: #3f54ce;
$custom-light: #8684de;
$custom-dark: #000000;

JSON

{
  "hex": "#3f54ce",
  "rgb": {
    "r": 63,
    "g": 84,
    "b": 206
  },
  "hsl": {
    "h": 231.189,
    "s": 59.336,
    "l": 52.745
  },
  "oklch": {
    "l": 0.50386,
    "c": 0.18904,
    "h": 270.6
  },
  "luminance": 0.11854
}

Semantic roles & 50–950 ramp

primary

#3F54CE

secondary

#D3CA95

accent

#CB45E3

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0D0A15

muted

#7D7C83

Preview Lab

Preview with #3F54CE

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

Preview Lab → · Contrast checker → · Palette generator →