#3F46B3#3F46B3

#3F46B3 is a mid, vivid blue. Relative luminance 0.087; OKLCH L 45.6% C 0.170 H 274.6°. Best body text is #FFFFFF at 7.67:1 contrast (WCAG AA passes).

Color values

HEX	#3F46B3
RGB	rgb(63, 70, 179)
HSL	hsl(236, 48%, 47%)
HSV	hsv(236, 65%, 70%)
CMYK	cmyk(64.8%, 60.9%, 0%, 29.8%)
CIE-LAB	lab(35.38, 31.94, -58.90)
CIE-LCH	lch(35.38, 67.00, 298.47°)
OKLab	oklab(45.58% 0.0137 -0.1696)
OKLCH	oklch(45.58% 0.17 274.6)
XYZ	xyz(12.3741, 8.6907, 43.6645)
Luminance	0.0869 (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

#3F46B3 #B3AC3F

analogous

#3F80B3 #3F46B3 #723FB3

triadic

#3F46B3 #B33F46 #46B33F

tetradic

#3F46B3 #B33F80 #B3AC3F #3FB372

square

#3F46B3 #B33F80 #B3AC3F #3FB372

split-complementary

#3F46B3 #B3723F #80B33F

monochromatic

#1F2358 #2F3486 #3F46B3 #666CC9 #9398D9

Accessibility & contrast

On white

7.67

#3F46B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.74

#3F46B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F46B3

7.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F46B3	#FFFFFF	#000000	##FFFFFF
##3F46B3	1.00	7.67	2.74	7.67
#FFFFFF	7.67	1.00	21.00	1.00
#000000	2.74	21.00	1.00	21.00
##FFFFFF	7.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058B7

Deuteranopia (green-blind)

#004EB1

Tritanopia (blue-blind)

#006176

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #3f46b3;
/* rgb */ color: rgb(63, 70, 179);
/* oklch */ color: oklch(45.6% 0.170 274.6);

Tailwind

colors: {
  custom: {
    50: '#8179cb',
    500: '#3f46b3',
    950: '#000000',
  },
}

SCSS

$custom: #3f46b3;
$custom-light: #8179cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f46b3",
  "rgb": {
    "r": 63,
    "g": 70,
    "b": 179
  },
  "hsl": {
    "h": 236.379,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.45575,
    "c": 0.17017,
    "h": 274.6
  },
  "luminance": 0.08692
}

Semantic roles & 50–950 ramp

primary

#3F46B3

secondary

#C4C189

accent

#CF50D8

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0913

muted

#7D7B82

Preview Lab

Preview with #3F46B3

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

Preview Lab → · Contrast checker → · Palette generator →