#3F5FB5#3F5FB5

#3F5FB5 is a mid, vivid blue. Relative luminance 0.126; OKLCH L 50.7% C 0.141 H 266.2°. Best body text is #FFFFFF at 5.97:1 contrast (WCAG AA passes).

Color values

HEX	#3F5FB5
RGB	rgb(63, 95, 181)
HSL	hsl(224, 48%, 48%)
HSV	hsv(224, 65%, 71%)
CMYK	cmyk(65.2%, 47.5%, 0%, 29%)
CIE-LAB	lab(42.12, 16.53, -49.18)
CIE-LCH	lch(42.12, 51.89, 288.58°)
OKLab	oklab(50.69% -0.0095 -0.1407)
OKLCH	oklch(50.69% 0.141 266.2)
XYZ	xyz(14.4797, 12.5760, 45.3714)
Luminance	0.1258 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5FB5 #B5953F

analogous

#3F9AB5 #3F5FB5 #5A3FB5

triadic

#3F5FB5 #B53F5F #5FB53F

tetradic

#3F5FB5 #B53F9A #B5953F #3FB55A

square

#3F5FB5 #B53F9A #B5953F #3FB55A

split-complementary

#3F5FB5 #B55A3F #9AB53F

monochromatic

#1F2F5A #2F4788 #3F5FB5 #6782CA #94A7DA

Accessibility & contrast

On white

5.97

#3F5FB5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.52

#3F5FB5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5FB5

5.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5FB5	#FFFFFF	#000000	##FFFFFF
##3F5FB5	1.00	5.97	3.52	5.97
#FFFFFF	5.97	1.00	21.00	1.00
#000000	3.52	21.00	1.00	21.00
##FFFFFF	5.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3369B8

Deuteranopia (green-blind)

#1C5EB3

Tritanopia (blue-blind)

#007381

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #3f5fb5;
/* rgb */ color: rgb(63, 95, 181);
/* oklch */ color: oklch(50.7% 0.141 266.2);

Tailwind

colors: {
  custom: {
    50: '#808bcc',
    500: '#3f5fb5',
    950: '#000000',
  },
}

SCSS

$custom: #3f5fb5;
$custom-light: #808bcc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5fb5",
  "rgb": {
    "r": 63,
    "g": 95,
    "b": 181
  },
  "hsl": {
    "h": 223.729,
    "s": 48.361,
    "l": 47.843
  },
  "oklch": {
    "l": 0.50685,
    "c": 0.14105,
    "h": 266.2
  },
  "luminance": 0.12577
}

Semantic roles & 50–950 ramp

primary

#3F5FB5

secondary

#C5B58A

accent

#B350D8

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C13

muted

#7C7D82

Preview Lab

Preview with #3F5FB5

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

Preview Lab → · Contrast checker → · Palette generator →