#3F46B2#3F46B2

#3F46B2 is a mid, vivid blue. Relative luminance 0.087; OKLCH L 45.5% C 0.169 H 274.7°. Best body text is #FFFFFF at 7.69:1 contrast (WCAG AA passes).

Color values

HEX	#3F46B2
RGB	rgb(63, 70, 178)
HSL	hsl(236, 48%, 47%)
HSV	hsv(236, 65%, 70%)
CMYK	cmyk(64.6%, 60.7%, 0%, 30.2%)
CIE-LAB	lab(35.30, 31.59, -58.43)
CIE-LCH	lch(35.30, 66.43, 298.40°)
OKLab	oklab(45.49% 0.0137 -0.1683)
OKLCH	oklch(45.49% 0.169 274.7)
XYZ	xyz(12.2733, 8.6504, 43.1338)
Luminance	0.0865 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F46B2 #B2AB3F

analogous

#3F7FB2 #3F46B2 #723FB2

triadic

#3F46B2 #B23F46 #46B23F

tetradic

#3F46B2 #B23F7F #B2AB3F #3FB272

square

#3F46B2 #B23F7F #B2AB3F #3FB272

split-complementary

#3F46B2 #B2723F #7FB23F

monochromatic

#1F2258 #2F3485 #3F46B2 #666CC9 #9397D9

Accessibility & contrast

On white

7.69

#3F46B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.73

#3F46B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F46B2

7.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F46B2	#FFFFFF	#000000	##FFFFFF
##3F46B2	1.00	7.69	2.73	7.69
#FFFFFF	7.69	1.00	21.00	1.00
#000000	2.73	21.00	1.00	21.00
##FFFFFF	7.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058B6

Deuteranopia (green-blind)

#004EB0

Tritanopia (blue-blind)

#006175

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #3f46b2;
/* rgb */ color: rgb(63, 70, 178);
/* oklch */ color: oklch(45.5% 0.169 274.7);

Tailwind

colors: {
  custom: {
    50: '#8179ca',
    500: '#3f46b2',
    950: '#000000',
  },
}

SCSS

$custom: #3f46b2;
$custom-light: #8179ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f46b2",
  "rgb": {
    "r": 63,
    "g": 70,
    "b": 178
  },
  "hsl": {
    "h": 236.348,
    "s": 47.718,
    "l": 47.255
  },
  "oklch": {
    "l": 0.45492,
    "c": 0.16882,
    "h": 274.7
  },
  "luminance": 0.08651
}

Semantic roles & 50–950 ramp

primary

#3F46B2

secondary

#C4C089

accent

#CF50D7

background

#F8F7FC

surface

#F0EDF8

border

#CBC8D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3F46B2

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

Preview Lab → · Contrast checker → · Palette generator →