#3F5BBB#3F5BBB

#3F5BBB is a mid, vivid blue. Relative luminance 0.121; OKLCH L 50.3% C 0.155 H 268.2°. Best body text is #FFFFFF at 6.13:1 contrast (WCAG AA passes).

Color values

HEX	#3F5BBB
RGB	rgb(63, 91, 187)
HSL	hsl(226, 50%, 49%)
HSV	hsv(226, 66%, 73%)
CMYK	cmyk(66.3%, 51.3%, 0%, 26.7%)
CIE-LAB	lab(41.41, 21.26, -53.82)
CIE-LCH	lch(41.41, 57.87, 291.55°)
OKLab	oklab(50.28% -0.0049 -0.1544)
OKLCH	oklch(50.28% 0.155 268.2)
XYZ	xyz(14.7575, 12.1254, 48.5668)
Luminance	0.1213 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5BBB #BB9F3F

analogous

#3F99BB #3F5BBB #613FBB

triadic

#3F5BBB #BB3F5B #5BBB3F

tetradic

#3F5BBB #BB3F99 #BB9F3F #3FBB61

square

#3F5BBB #BB3F99 #BB9F3F #3FBB61

split-complementary

#3F5BBB #BB613F #99BB3F

monochromatic

#202E5F #30458D #3F5BBB #6A81CD #98A7DC

Accessibility & contrast

On white

6.13

#3F5BBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.43

#3F5BBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5BBB

6.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5BBB	#FFFFFF	#000000	##FFFFFF
##3F5BBB	1.00	6.13	3.43	6.13
#FFFFFF	6.13	1.00	21.00	1.00
#000000	3.43	21.00	1.00	21.00
##FFFFFF	6.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2268BE

Deuteranopia (green-blind)

#005CB9

Tritanopia (blue-blind)

#007282

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #3f5bbb;
/* rgb */ color: rgb(63, 91, 187);
/* oklch */ color: oklch(50.3% 0.155 268.2);

Tailwind

colors: {
  custom: {
    50: '#8189d0',
    500: '#3f5bbb',
    950: '#000000',
  },
}

SCSS

$custom: #3f5bbb;
$custom-light: #8189d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5bbb",
  "rgb": {
    "r": 63,
    "g": 91,
    "b": 187
  },
  "hsl": {
    "h": 226.452,
    "s": 49.6,
    "l": 49.02
  },
  "oklch": {
    "l": 0.50276,
    "c": 0.15452,
    "h": 268.2
  },
  "luminance": 0.12127
}

Semantic roles & 50–950 ramp

primary

#3F5BBB

secondary

#C8BB8E

accent

#BA4FD9

background

#F8F8FC

surface

#F0EFF9

border

#CBCAD2

text

#0C0B14

muted

#7D7C82

Preview Lab

Preview with #3F5BBB

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

Preview Lab → · Contrast checker → · Palette generator →