#3F5CB0#3F5CB0

#3F5CB0 is a mid, vivid blue. Relative luminance 0.118; OKLCH L 49.7% C 0.138 H 267.0°. Best body text is #FFFFFF at 6.23:1 contrast (WCAG AA passes).

Color values

HEX	#3F5CB0
RGB	rgb(63, 92, 176)
HSL	hsl(225, 47%, 47%)
HSV	hsv(225, 64%, 69%)
CMYK	cmyk(64.2%, 47.7%, 0%, 31%)
CIE-LAB	lab(40.97, 16.68, -48.09)
CIE-LCH	lch(40.97, 50.90, 289.13°)
OKLab	oklab(49.71% -0.0072 -0.1376)
OKLCH	oklch(49.71% 0.138 267)
XYZ	xyz(13.7108, 11.8444, 42.6295)
Luminance	0.1185 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5CB0 #B0933F

analogous

#3F95B0 #3F5CB0 #5B3FB0

triadic

#3F5CB0 #B03F5C #5CB03F

tetradic

#3F5CB0 #B03F95 #B0933F #3FB05B

square

#3F5CB0 #B03F95 #B0933F #3FB05B

split-complementary

#3F5CB0 #B05B3F #95B03F

monochromatic

#1F2D56 #2F4483 #3F5CB0 #657EC8 #92A4D8

Accessibility & contrast

On white

6.23

#3F5CB0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.37

#3F5CB0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5CB0

6.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5CB0	#FFFFFF	#000000	##FFFFFF
##3F5CB0	1.00	6.23	3.37	6.23
#FFFFFF	6.23	1.00	21.00	1.00
#000000	3.37	21.00	1.00	21.00
##FFFFFF	6.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3166B3

Deuteranopia (green-blind)

#1C5CAE

Tritanopia (blue-blind)

#006F7D

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #3f5cb0;
/* rgb */ color: rgb(63, 92, 176);
/* oklch */ color: oklch(49.7% 0.138 267.0);

Tailwind

colors: {
  custom: {
    50: '#7f89c8',
    500: '#3f5cb0',
    950: '#000000',
  },
}

SCSS

$custom: #3f5cb0;
$custom-light: #7f89c8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5cb0",
  "rgb": {
    "r": 63,
    "g": 92,
    "b": 176
  },
  "hsl": {
    "h": 224.602,
    "s": 47.28,
    "l": 46.863
  },
  "oklch": {
    "l": 0.49705,
    "c": 0.13776,
    "h": 267
  },
  "luminance": 0.11846
}

Semantic roles & 50–950 ramp

primary

#3F5CB0

secondary

#C3B488

accent

#B551D7

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3F5CB0

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

Preview Lab → · Contrast checker → · Palette generator →