#3F5BB5#3F5BB5

#3F5BB5 is a mid, vivid blue. Relative luminance 0.119; OKLCH L 49.8% C 0.146 H 267.8°. Best body text is #FFFFFF at 6.22:1 contrast (WCAG AA passes).

Color values

HEX	#3F5BB5
RGB	rgb(63, 91, 181)
HSL	hsl(226, 48%, 48%)
HSV	hsv(226, 65%, 71%)
CMYK	cmyk(65.2%, 49.7%, 0%, 29%)
CIE-LAB	lab(41.01, 19.11, -50.95)
CIE-LCH	lch(41.01, 54.42, 290.56°)
OKLab	oklab(49.84% -0.0056 -0.146)
OKLCH	oklch(49.84% 0.146 267.8)
XYZ	xyz(14.1286, 11.8738, 45.2544)
Luminance	0.1187 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5BB5 #B5993F

analogous

#3F96B5 #3F5BB5 #5E3FB5

triadic

#3F5BB5 #B53F5B #5BB53F

tetradic

#3F5BB5 #B53F96 #B5993F #3FB55E

square

#3F5BB5 #B53F96 #B5993F #3FB55E

split-complementary

#3F5BB5 #B55E3F #96B53F

monochromatic

#1F2D5A #2F4488 #3F5BB5 #677FCA #94A5DA

Accessibility & contrast

On white

6.22

#3F5BB5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.38

#3F5BB5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5BB5

6.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5BB5	#FFFFFF	#000000	##FFFFFF
##3F5BB5	1.00	6.22	3.38	6.22
#FFFFFF	6.22	1.00	21.00	1.00
#000000	3.38	21.00	1.00	21.00
##FFFFFF	6.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A66B8

Deuteranopia (green-blind)

#0A5CB3

Tritanopia (blue-blind)

#00707F

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #3f5bb5;
/* rgb */ color: rgb(63, 91, 181);
/* oklch */ color: oklch(49.8% 0.146 267.8);

Tailwind

colors: {
  custom: {
    50: '#8089cc',
    500: '#3f5bb5',
    950: '#000000',
  },
}

SCSS

$custom: #3f5bb5;
$custom-light: #8089cc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5bb5",
  "rgb": {
    "r": 63,
    "g": 91,
    "b": 181
  },
  "hsl": {
    "h": 225.763,
    "s": 48.361,
    "l": 47.843
  },
  "oklch": {
    "l": 0.49844,
    "c": 0.14612,
    "h": 267.8
  },
  "luminance": 0.11875
}

Semantic roles & 50–950 ramp

primary

#3F5BB5

secondary

#C5B78A

accent

#B850D8

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3F5BB5

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

Preview Lab → · Contrast checker → · Palette generator →