#3F5DB1#3F5DB1

#3F5DB1 is a mid, vivid blue. Relative luminance 0.121; OKLCH L 50.0% C 0.138 H 266.6°. Best body text is #FFFFFF at 6.15:1 contrast (WCAG AA passes).

Color values

HEX	#3F5DB1
RGB	rgb(63, 93, 177)
HSL	hsl(224, 48%, 47%)
HSV	hsv(224, 64%, 69%)
CMYK	cmyk(64.4%, 47.5%, 0%, 30.6%)
CIE-LAB	lab(41.31, 16.39, -48.13)
CIE-LCH	lch(41.31, 50.85, 288.80°)
OKLab	oklab(49.99% -0.0081 -0.1377)
OKLCH	oklch(49.99% 0.138 266.6)
XYZ	xyz(13.8973, 12.0585, 43.1816)
Luminance	0.1206 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5DB1 #B1933F

analogous

#3F96B1 #3F5DB1 #5A3FB1

triadic

#3F5DB1 #B13F5D #5DB13F

tetradic

#3F5DB1 #B13F96 #B1933F #3FB15A

square

#3F5DB1 #B13F96 #B1933F #3FB15A

split-complementary

#3F5DB1 #B15A3F #96B13F

monochromatic

#1F2E57 #2F4584 #3F5DB1 #657FC8 #92A5D8

Accessibility & contrast

On white

6.15

#3F5DB1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.41

#3F5DB1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5DB1

6.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5DB1	#FFFFFF	#000000	##FFFFFF
##3F5DB1	1.00	6.15	3.41	6.15
#FFFFFF	6.15	1.00	21.00	1.00
#000000	3.41	21.00	1.00	21.00
##FFFFFF	6.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3367B4

Deuteranopia (green-blind)

#1D5DAF

Tritanopia (blue-blind)

#00707E

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #3f5db1;
/* rgb */ color: rgb(63, 93, 177);
/* oklch */ color: oklch(50.0% 0.138 266.6);

Tailwind

colors: {
  custom: {
    50: '#808ac9',
    500: '#3f5db1',
    950: '#000000',
  },
}

SCSS

$custom: #3f5db1;
$custom-light: #808ac9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5db1",
  "rgb": {
    "r": 63,
    "g": 93,
    "b": 177
  },
  "hsl": {
    "h": 224.211,
    "s": 47.5,
    "l": 47.059
  },
  "oklch": {
    "l": 0.49986,
    "c": 0.13792,
    "h": 266.6
  },
  "luminance": 0.1206
}

Semantic roles & 50–950 ramp

primary

#3F5DB1

secondary

#C4B488

accent

#B451D7

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3F5DB1

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

Preview Lab → · Contrast checker → · Palette generator →