#3F5EB3#3F5EB3

#3F5EB3 is a mid, vivid blue. Relative luminance 0.123; OKLCH L 50.3% C 0.139 H 266.4°. Best body text is #FFFFFF at 6.06:1 contrast (WCAG AA passes).

Color values

HEX	#3F5EB3
RGB	rgb(63, 94, 179)
HSL	hsl(224, 48%, 47%)
HSV	hsv(224, 65%, 70%)
CMYK	cmyk(64.8%, 47.5%, 0%, 29.8%)
CIE-LAB	lab(41.71, 16.46, -48.66)
CIE-LCH	lch(41.71, 51.37, 288.69°)
OKLab	oklab(50.33% -0.0088 -0.1392)
OKLCH	oklch(50.33% 0.139 266.4)
XYZ	xyz(14.1865, 12.3155, 44.2686)
Luminance	0.1232 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5EB3 #B3943F

analogous

#3F98B3 #3F5EB3 #5A3FB3

triadic

#3F5EB3 #B33F5E #5EB33F

tetradic

#3F5EB3 #B33F98 #B3943F #3FB35A

square

#3F5EB3 #B33F98 #B3943F #3FB35A

split-complementary

#3F5EB3 #B35A3F #98B33F

monochromatic

#1F2E58 #2F4686 #3F5EB3 #6681C9 #93A6D9

Accessibility & contrast

On white

6.06

#3F5EB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.46

#3F5EB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5EB3

6.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5EB3	#FFFFFF	#000000	##FFFFFF
##3F5EB3	1.00	6.06	3.46	6.06
#FFFFFF	6.06	1.00	21.00	1.00
#000000	3.46	21.00	1.00	21.00
##FFFFFF	6.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3368B6

Deuteranopia (green-blind)

#1C5DB1

Tritanopia (blue-blind)

#007280

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #3f5eb3;
/* rgb */ color: rgb(63, 94, 179);
/* oklch */ color: oklch(50.3% 0.139 266.4);

Tailwind

colors: {
  custom: {
    50: '#808bca',
    500: '#3f5eb3',
    950: '#000000',
  },
}

SCSS

$custom: #3f5eb3;
$custom-light: #808bca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5eb3",
  "rgb": {
    "r": 63,
    "g": 94,
    "b": 179
  },
  "hsl": {
    "h": 223.966,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.50335,
    "c": 0.13949,
    "h": 266.4
  },
  "luminance": 0.12317
}

Semantic roles & 50–950 ramp

primary

#3F5EB3

secondary

#C4B589

accent

#B350D8

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3F5EB3

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

Preview Lab → · Contrast checker → · Palette generator →