#3F519A#3F519A

#3F519A is a mid, vivid blue. Relative luminance 0.093; OKLCH L 45.9% C 0.120 H 270.6°. Best body text is #FFFFFF at 7.36:1 contrast (WCAG AA passes).

Color values

HEX	#3F519A
RGB	rgb(63, 81, 154)
HSL	hsl(228, 42%, 43%)
HSV	hsv(228, 59%, 60%)
CMYK	cmyk(59.1%, 47.4%, 0%, 39.6%)
CIE-LAB	lab(36.51, 16.03, -42.15)
CIE-LCH	lch(36.51, 45.09, 290.82°)
OKLab	oklab(45.85% 0.0013 -0.1202)
OKLCH	oklch(45.85% 0.12 270.6)
XYZ	xyz(10.8231, 9.2739, 31.7853)
Luminance	0.0927 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F519A #9A883F

analogous

#3F7E9A #3F519A #5B3F9A

triadic

#3F519A #9A3F51 #519A3F

tetradic

#3F519A #9A3F7E #9A883F #3F9A5B

square

#3F519A #9A3F7E #9A883F #3F9A5B

split-complementary

#3F519A #9A5B3F #7E9A3F

monochromatic

#1B2343 #2D3A6F #3F519A #5A6EBC #8694CD

Accessibility & contrast

On white

7.36

#3F519A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.85

#3F519A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F519A

7.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F519A	#FFFFFF	#000000	##FFFFFF
##3F519A	1.00	7.36	2.85	7.36
#FFFFFF	7.36	1.00	21.00	1.00
#000000	2.85	21.00	1.00	21.00
##FFFFFF	7.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F5A9D

Deuteranopia (green-blind)

#215298

Tritanopia (blue-blind)

#00616E

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f519a;
/* rgb */ color: rgb(63, 81, 154);
/* oklch */ color: oklch(45.9% 0.120 270.6);

Tailwind

colors: {
  custom: {
    50: '#7c81b8',
    500: '#3f519a',
    950: '#000000',
  },
}

SCSS

$custom: #3f519a;
$custom-light: #7c81b8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f519a",
  "rgb": {
    "r": 63,
    "g": 81,
    "b": 154
  },
  "hsl": {
    "h": 228.132,
    "s": 41.935,
    "l": 42.549
  },
  "oklch": {
    "l": 0.45854,
    "c": 0.12024,
    "h": 270.6
  },
  "luminance": 0.09275
}

Semantic roles & 50–950 ramp

primary

#3F519A

secondary

#B8AC7D

accent

#B956D2

background

#F7F7FB

surface

#EEEEF6

border

#C9C9D0

text

#0A0A11

muted

#7C7C80

Preview Lab

Preview with #3F519A

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

Preview Lab → · Contrast checker → · Palette generator →