#3F5CB2#3F5CB2

#3F5CB2 is a mid, vivid blue. Relative luminance 0.119; OKLCH L 49.8% C 0.141 H 267.2°. Best body text is #FFFFFF at 6.20:1 contrast (WCAG AA passes).

Color values

HEX	#3F5CB2
RGB	rgb(63, 92, 178)
HSL	hsl(225, 48%, 47%)
HSV	hsv(225, 65%, 70%)
CMYK	cmyk(64.6%, 48.3%, 0%, 30.2%)
CIE-LAB	lab(41.10, 17.39, -49.06)
CIE-LCH	lch(41.10, 52.05, 289.52°)
OKLab	oklab(49.84% -0.0069 -0.1404)
OKLCH	oklch(49.84% 0.141 267.2)
XYZ	xyz(13.9102, 11.9241, 43.6794)
Luminance	0.1192 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5CB2 #B2953F

analogous

#3F95B2 #3F5CB2 #5C3FB2

triadic

#3F5CB2 #B23F5C #5CB23F

tetradic

#3F5CB2 #B23F95 #B2953F #3FB25C

square

#3F5CB2 #B23F95 #B2953F #3FB25C

split-complementary

#3F5CB2 #B25C3F #95B23F

monochromatic

#1F2D58 #2F4585 #3F5CB2 #667FC9 #93A4D9

Accessibility & contrast

On white

6.20

#3F5CB2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.39

#3F5CB2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5CB2

6.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5CB2	#FFFFFF	#000000	##FFFFFF
##3F5CB2	1.00	6.20	3.39	6.20
#FFFFFF	6.20	1.00	21.00	1.00
#000000	3.39	21.00	1.00	21.00
##FFFFFF	6.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3066B5

Deuteranopia (green-blind)

#185CB0

Tritanopia (blue-blind)

#00707E

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #3f5cb2;
/* rgb */ color: rgb(63, 92, 178);
/* oklch */ color: oklch(49.8% 0.141 267.2);

Tailwind

colors: {
  custom: {
    50: '#8089c9',
    500: '#3f5cb2',
    950: '#000000',
  },
}

SCSS

$custom: #3f5cb2;
$custom-light: #8089c9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5cb2",
  "rgb": {
    "r": 63,
    "g": 92,
    "b": 178
  },
  "hsl": {
    "h": 224.87,
    "s": 47.718,
    "l": 47.255
  },
  "oklch": {
    "l": 0.49843,
    "c": 0.1406,
    "h": 267.2
  },
  "luminance": 0.11925
}

Semantic roles & 50–950 ramp

primary

#3F5CB2

secondary

#C4B589

accent

#B550D7

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3F5CB2

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

Preview Lab → · Contrast checker → · Palette generator →