#3F5BB9#3F5BB9

#3F5BB9 is a mid, vivid blue. Relative luminance 0.120; OKLCH L 50.1% C 0.152 H 268.1°. Best body text is #FFFFFF at 6.16:1 contrast (WCAG AA passes).

Color values

HEX	#3F5BB9
RGB	rgb(63, 91, 185)
HSL	hsl(226, 49%, 49%)
HSV	hsv(226, 66%, 73%)
CMYK	cmyk(65.9%, 50.8%, 0%, 27.5%)
CIE-LAB	lab(41.28, 20.54, -52.87)
CIE-LCH	lch(41.28, 56.72, 291.23°)
OKLab	oklab(50.13% -0.0051 -0.1516)
OKLCH	oklch(50.13% 0.152 268.1)
XYZ	xyz(14.5449, 12.0404, 47.4470)
Luminance	0.1204 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5BB9 #B99D3F

analogous

#3F98B9 #3F5BB9 #603FB9

triadic

#3F5BB9 #B93F5B #5BB93F

tetradic

#3F5BB9 #B93F98 #B99D3F #3FB960

square

#3F5BB9 #B93F98 #B99D3F #3FB960

split-complementary

#3F5BB9 #B9603F #98B93F

monochromatic

#202E5E #2F458B #3F5BB9 #6980CC #97A7DC

Accessibility & contrast

On white

6.16

#3F5BB9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.41

#3F5BB9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5BB9

6.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5BB9	#FFFFFF	#000000	##FFFFFF
##3F5BB9	1.00	6.16	3.41	6.16
#FFFFFF	6.16	1.00	21.00	1.00
#000000	3.41	21.00	1.00	21.00
##FFFFFF	6.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2567BC

Deuteranopia (green-blind)

#005CB7

Tritanopia (blue-blind)

#007181

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #3f5bb9;
/* rgb */ color: rgb(63, 91, 185);
/* oklch */ color: oklch(50.1% 0.152 268.1);

Tailwind

colors: {
  custom: {
    50: '#8189cf',
    500: '#3f5bb9',
    950: '#000000',
  },
}

SCSS

$custom: #3f5bb9;
$custom-light: #8189cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5bb9",
  "rgb": {
    "r": 63,
    "g": 91,
    "b": 185
  },
  "hsl": {
    "h": 226.23,
    "s": 49.194,
    "l": 48.627
  },
  "oklch": {
    "l": 0.50131,
    "c": 0.15173,
    "h": 268.1
  },
  "luminance": 0.12042
}

Semantic roles & 50–950 ramp

primary

#3F5BB9

secondary

#C7BA8D

accent

#B94FD9

background

#F8F8FC

surface

#F0EFF9

border

#CBCAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #3F5BB9

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

Preview Lab → · Contrast checker → · Palette generator →