#3F46A5#3F46A5

#3F46A5 is a dark, vivid blue. Relative luminance 0.082; OKLCH L 44.4% C 0.151 H 275.2°. Best body text is #FFFFFF at 7.98:1 contrast (WCAG AA passes).

Color values

HEX	#3F46A5
RGB	rgb(63, 70, 165)
HSL	hsl(236, 45%, 45%)
HSV	hsv(236, 62%, 65%)
CMYK	cmyk(61.8%, 57.6%, 0%, 35.3%)
CIE-LAB	lab(34.30, 27.07, -52.32)
CIE-LCH	lch(34.30, 58.91, 297.36°)
OKLab	oklab(44.43% 0.0138 -0.1503)
OKLCH	oklch(44.43% 0.151 275.2)
XYZ	xyz(11.0294, 8.1528, 36.5824)
Luminance	0.0815 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F46A5 #A59E3F

analogous

#3F79A5 #3F46A5 #6B3FA5

triadic

#3F46A5 #A53F46 #46A53F

tetradic

#3F46A5 #A53F79 #A59E3F #3FA56B

square

#3F46A5 #A53F79 #A59E3F #3FA56B

split-complementary

#3F46A5 #A56B3F #79A53F

monochromatic

#1D204C #2E3379 #3F46A5 #5F66C2 #8C90D3

Accessibility & contrast

On white

7.98

#3F46A5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#3F46A5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F46A5

7.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F46A5	#FFFFFF	#000000	##FFFFFF
##3F46A5	1.00	7.98	2.63	7.98
#FFFFFF	7.98	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	7.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055A8

Deuteranopia (green-blind)

#004CA3

Tritanopia (blue-blind)

#005D6E

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3f46a5;
/* rgb */ color: rgb(63, 70, 165);
/* oklch */ color: oklch(44.4% 0.151 275.2);

Tailwind

colors: {
  custom: {
    50: '#7f79c0',
    500: '#3f46a5',
    950: '#000000',
  },
}

SCSS

$custom: #3f46a5;
$custom-light: #7f79c0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f46a5",
  "rgb": {
    "r": 63,
    "g": 70,
    "b": 165
  },
  "hsl": {
    "h": 235.882,
    "s": 44.737,
    "l": 44.706
  },
  "oklch": {
    "l": 0.44433,
    "c": 0.1509,
    "h": 275.2
  },
  "luminance": 0.08154
}

Semantic roles & 50–950 ramp

primary

#3F46A5

secondary

#BEBA82

accent

#CC53D4

background

#F8F7FB

surface

#EFEDF7

border

#CAC8D0

text

#0B0912

muted

#7C7B81

Preview Lab

Preview with #3F46A5

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

Preview Lab → · Contrast checker → · Palette generator →