#3F53B4#3F53B4

#3F53B4 is a mid, vivid blue. Relative luminance 0.105; OKLCH L 48.1% C 0.155 H 270.7°. Best body text is #FFFFFF at 6.76:1 contrast (WCAG AA passes).

Color values

HEX	#3F53B4
RGB	rgb(63, 83, 180)
HSL	hsl(230, 48%, 48%)
HSV	hsv(230, 65%, 71%)
CMYK	cmyk(65%, 53.9%, 0%, 29.4%)
CIE-LAB	lab(38.79, 23.93, -53.96)
CIE-LCH	lch(38.79, 59.02, 293.92°)
OKLab	oklab(48.14% 0.002 -0.1549)
OKLCH	oklch(48.14% 0.155 270.7)
XYZ	xyz(13.3786, 10.5374, 44.5000)
Luminance	0.1054 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F53B4 #B4A03F

analogous

#3F8DB4 #3F53B4 #663FB4

triadic

#3F53B4 #B43F53 #53B43F

tetradic

#3F53B4 #B43F8D #B4A03F #3FB466

square

#3F53B4 #B43F8D #B4A03F #3FB466

split-complementary

#3F53B4 #B4663F #8DB43F

monochromatic

#1F2959 #2F3E87 #3F53B4 #6777CA #94A0DA

Accessibility & contrast

On white

6.76

#3F53B4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#3F53B4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F53B4

6.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F53B4	#FFFFFF	#000000	##FFFFFF
##3F53B4	1.00	6.76	3.11	6.76
#FFFFFF	6.76	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1061B7

Deuteranopia (green-blind)

#0056B2

Tritanopia (blue-blind)

#006A7B

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3f53b4;
/* rgb */ color: rgb(63, 83, 180);
/* oklch */ color: oklch(48.1% 0.155 270.7);

Tailwind

colors: {
  custom: {
    50: '#8183cb',
    500: '#3f53b4',
    950: '#000000',
  },
}

SCSS

$custom: #3f53b4;
$custom-light: #8183cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f53b4",
  "rgb": {
    "r": 63,
    "g": 83,
    "b": 180
  },
  "hsl": {
    "h": 229.744,
    "s": 48.148,
    "l": 47.647
  },
  "oklch": {
    "l": 0.4814,
    "c": 0.15496,
    "h": 270.7
  },
  "luminance": 0.10539
}

Semantic roles & 50–950 ramp

primary

#3F53B4

secondary

#C5BB8A

accent

#C150D8

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A13

muted

#7C7C82

Preview Lab

Preview with #3F53B4

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

Preview Lab → · Contrast checker → · Palette generator →