#3F5FBA#3F5FBA

#3F5FBA is a mid, vivid blue. Relative luminance 0.128; OKLCH L 51.0% C 0.148 H 266.6°. Best body text is #FFFFFF at 5.90:1 contrast (WCAG AA passes).

Color values

HEX	#3F5FBA
RGB	rgb(63, 95, 186)
HSL	hsl(224, 49%, 49%)
HSV	hsv(224, 66%, 73%)
CMYK	cmyk(66.1%, 48.9%, 0%, 27.1%)
CIE-LAB	lab(42.44, 18.33, -51.59)
CIE-LCH	lch(42.44, 54.75, 289.56°)
OKLab	oklab(51.03% -0.0088 -0.1478)
OKLCH	oklch(51.03% 0.148 266.6)
XYZ	xyz(15.0020, 12.7849, 48.1220)
Luminance	0.1279 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5FBA #BA9A3F

analogous

#3F9DBA #3F5FBA #5D3FBA

triadic

#3F5FBA #BA3F5F #5FBA3F

tetradic

#3F5FBA #BA3F9D #BA9A3F #3FBA5D

square

#3F5FBA #BA3F9D #BA9A3F #3FBA5D

split-complementary

#3F5FBA #BA5D3F #9DBA3F

monochromatic

#20305F #30488C #3F5FBA #6A83CC #97A9DC

Accessibility & contrast

On white

5.90

#3F5FBA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.56

#3F5FBA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5FBA

5.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5FBA	#FFFFFF	#000000	##FFFFFF
##3F5FBA	1.00	5.90	3.56	5.90
#FFFFFF	5.90	1.00	21.00	1.00
#000000	3.56	21.00	1.00	21.00
##FFFFFF	5.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E6ABD

Deuteranopia (green-blind)

#0F5FB8

Tritanopia (blue-blind)

#007483

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #3f5fba;
/* rgb */ color: rgb(63, 95, 186);
/* oklch */ color: oklch(51.0% 0.148 266.6);

Tailwind

colors: {
  custom: {
    50: '#818bcf',
    500: '#3f5fba',
    950: '#000000',
  },
}

SCSS

$custom: #3f5fba;
$custom-light: #818bcf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5fba",
  "rgb": {
    "r": 63,
    "g": 95,
    "b": 186
  },
  "hsl": {
    "h": 224.39,
    "s": 49.398,
    "l": 48.824
  },
  "oklch": {
    "l": 0.51032,
    "c": 0.14808,
    "h": 266.6
  },
  "luminance": 0.12786
}

Semantic roles & 50–950 ramp

primary

#3F5FBA

secondary

#C8B88D

accent

#B54FD9

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3F5FBA

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

Preview Lab → · Contrast checker → · Palette generator →