#3F5FBC#3F5FBC

#3F5FBC is a mid, vivid blue. Relative luminance 0.129; OKLCH L 51.2% C 0.151 H 266.8°. Best body text is #FFFFFF at 5.88:1 contrast (WCAG AA passes).

Color values

HEX	#3F5FBC
RGB	rgb(63, 95, 188)
HSL	hsl(225, 50%, 49%)
HSV	hsv(225, 66%, 74%)
CMYK	cmyk(66.5%, 49.5%, 0%, 26.3%)
CIE-LAB	lab(42.57, 19.05, -52.55)
CIE-LCH	lch(42.57, 55.89, 289.92°)
OKLab	oklab(51.17% -0.0085 -0.1506)
OKLCH	oklch(51.17% 0.151 266.8)
XYZ	xyz(15.2161, 12.8706, 49.2496)
Luminance	0.1287 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5FBC #BC9C3F

analogous

#3F9EBC #3F5FBC #5E3FBC

triadic

#3F5FBC #BC3F5F #5FBC3F

tetradic

#3F5FBC #BC3F9E #BC9C3F #3FBC5E

square

#3F5FBC #BC3F9E #BC9C3F #3FBC5E

split-complementary

#3F5FBC #BC5E3F #9EBC3F

monochromatic

#203160 #30488E #3F5FBC #6B84CD #99AADD

Accessibility & contrast

On white

5.88

#3F5FBC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.57

#3F5FBC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5FBC

5.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5FBC	#FFFFFF	#000000	##FFFFFF
##3F5FBC	1.00	5.88	3.57	5.88
#FFFFFF	5.88	1.00	21.00	1.00
#000000	3.57	21.00	1.00	21.00
##FFFFFF	5.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C6ABF

Deuteranopia (green-blind)

#075FBA

Tritanopia (blue-blind)

#007584

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #3f5fbc;
/* rgb */ color: rgb(63, 95, 188);
/* oklch */ color: oklch(51.2% 0.151 266.8);

Tailwind

colors: {
  custom: {
    50: '#818bd1',
    500: '#3f5fbc',
    950: '#000000',
  },
}

SCSS

$custom: #3f5fbc;
$custom-light: #818bd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5fbc",
  "rgb": {
    "r": 63,
    "g": 95,
    "b": 188
  },
  "hsl": {
    "h": 224.64,
    "s": 49.801,
    "l": 49.216
  },
  "oklch": {
    "l": 0.51173,
    "c": 0.15087,
    "h": 266.8
  },
  "luminance": 0.12872
}

Semantic roles & 50–950 ramp

primary

#3F5FBC

secondary

#C9BA8E

accent

#B64ED9

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0C0C14

muted

#7D7D82

Preview Lab

Preview with #3F5FBC

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

Preview Lab → · Contrast checker → · Palette generator →