#3F54CD#3F54CD

#3F54CD is a mid, vivid blue. Relative luminance 0.118; OKLCH L 50.3% C 0.188 H 270.6°. Best body text is #FFFFFF at 6.25:1 contrast (WCAG AA passes).

Color values

HEX	#3F54CD
RGB	rgb(63, 84, 205)
HSL	hsl(231, 59%, 53%)
HSV	hsv(231, 69%, 80%)
CMYK	cmyk(69.3%, 59%, 0%, 19.6%)
CIE-LAB	lab(40.90, 32.16, -65.10)
CIE-LCH	lch(40.90, 72.61, 296.29°)
OKLab	oklab(50.3% 0.002 -0.1877)
OKLCH	oklch(50.3% 0.188 270.6)
XYZ	xyz(16.2359, 11.8036, 59.1685)
Luminance	0.1181 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F54CD #CDB83F

analogous

#3F9BCD #3F54CD #713FCD

triadic

#3F54CD #CD3F54 #54CD3F

tetradic

#3F54CD #CD3F9B #CDB83F #3FCD71

square

#3F54CD #CD3F9B #CDB83F #3FCD71

split-complementary

#3F54CD #CD713F #9BCD3F

monochromatic

#1E2B74 #2B3DA4 #3F54CD #707FDA #A0AAE6

Accessibility & contrast

On white

6.25

#3F54CD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.36

#3F54CD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F54CD

6.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F54CD	#FFFFFF	#000000	##FFFFFF
##3F54CD	1.00	6.25	3.36	6.25
#FFFFFF	6.25	1.00	21.00	1.00
#000000	3.36	21.00	1.00	21.00
##FFFFFF	6.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0067D1

Deuteranopia (green-blind)

#005ACB

Tritanopia (blue-blind)

#007288

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #3f54cd;
/* rgb */ color: rgb(63, 84, 205);
/* oklch */ color: oklch(50.3% 0.188 270.6);

Tailwind

colors: {
  custom: {
    50: '#8584dd',
    500: '#3f54cd',
    950: '#000000',
  },
}

SCSS

$custom: #3f54cd;
$custom-light: #8584dd;
$custom-dark: #000000;

JSON

{
  "hex": "#3f54cd",
  "rgb": {
    "r": 63,
    "g": 84,
    "b": 205
  },
  "hsl": {
    "h": 231.127,
    "s": 58.678,
    "l": 52.549
  },
  "oklch": {
    "l": 0.50304,
    "c": 0.18772,
    "h": 270.6
  },
  "luminance": 0.11805
}

Semantic roles & 50–950 ramp

primary

#3F54CD

secondary

#D3CA95

accent

#CB46E2

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0A15

muted

#7D7C83

Preview Lab

Preview with #3F54CD

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

Preview Lab → · Contrast checker → · Palette generator →