#3F5CB3#3F5CB3

#3F5CB3 is a mid, vivid blue. Relative luminance 0.120; OKLCH L 49.9% C 0.142 H 267.3°. Best body text is #FFFFFF at 6.19:1 contrast (WCAG AA passes).

Color values

HEX	#3F5CB3
RGB	rgb(63, 92, 179)
HSL	hsl(225, 48%, 47%)
HSV	hsv(225, 65%, 70%)
CMYK	cmyk(64.8%, 48.6%, 0%, 29.8%)
CIE-LAB	lab(41.16, 17.75, -49.55)
CIE-LCH	lch(41.16, 52.63, 289.71°)
OKLab	oklab(49.91% -0.0068 -0.1418)
OKLCH	oklch(49.91% 0.142 267.3)
XYZ	xyz(14.0109, 11.9645, 44.2101)
Luminance	0.1197 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5CB3 #B3963F

analogous

#3F96B3 #3F5CB3 #5C3FB3

triadic

#3F5CB3 #B33F5C #5CB33F

tetradic

#3F5CB3 #B33F96 #B3963F #3FB35C

square

#3F5CB3 #B33F96 #B3963F #3FB35C

split-complementary

#3F5CB3 #B35C3F #96B33F

monochromatic

#1F2D58 #2F4586 #3F5CB3 #667FC9 #93A5D9

Accessibility & contrast

On white

6.19

#3F5CB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.39

#3F5CB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5CB3

6.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5CB3	#FFFFFF	#000000	##FFFFFF
##3F5CB3	1.00	6.19	3.39	6.19
#FFFFFF	6.19	1.00	21.00	1.00
#000000	3.39	21.00	1.00	21.00
##FFFFFF	6.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E67B6

Deuteranopia (green-blind)

#155CB1

Tritanopia (blue-blind)

#00707F

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #3f5cb3;
/* rgb */ color: rgb(63, 92, 179);
/* oklch */ color: oklch(49.9% 0.142 267.3);

Tailwind

colors: {
  custom: {
    50: '#8089ca',
    500: '#3f5cb3',
    950: '#000000',
  },
}

SCSS

$custom: #3f5cb3;
$custom-light: #8089ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5cb3",
  "rgb": {
    "r": 63,
    "g": 92,
    "b": 179
  },
  "hsl": {
    "h": 225,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.49913,
    "c": 0.14201,
    "h": 267.3
  },
  "luminance": 0.11966
}

Semantic roles & 50–950 ramp

primary

#3F5CB3

secondary

#C4B689

accent

#B650D8

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3F5CB3

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

Preview Lab → · Contrast checker → · Palette generator →