#3B51BF#3B51BF

#3B51BF is a mid, vivid blue. Relative luminance 0.106; OKLCH L 48.4% C 0.174 H 270.1°. Best body text is #FFFFFF at 6.74:1 contrast (WCAG AA passes).

Color values

HEX	#3B51BF
RGB	rgb(59, 81, 191)
HSL	hsl(230, 53%, 49%)
HSV	hsv(230, 69%, 75%)
CMYK	cmyk(69.1%, 57.6%, 0%, 25.1%)
CIE-LAB	lab(38.86, 28.53, -60.31)
CIE-LCH	lch(38.86, 66.72, 295.32°)
OKLab	oklab(48.38% 0.0002 -0.1738)
OKLCH	oklch(48.38% 0.174 270.1)
XYZ	xyz(14.1468, 10.5749, 50.5757)
Luminance	0.1058 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B51BF #BFA93B

analogous

#3B93BF #3B51BF #673BBF

triadic

#3B51BF #BF3B51 #51BF3B

tetradic

#3B51BF #BF3B93 #BFA93B #3BBF67

square

#3B51BF #BF3B93 #BFA93B #3BBF67

split-complementary

#3B51BF #BF673B #93BF3B

monochromatic

#1E2961 #2D3D90 #3B51BF #6779D0 #96A2DF

Accessibility & contrast

On white

6.74

#3B51BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.12

#3B51BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3B51BF

6.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B51BF	#FFFFFF	#000000	##FFFFFF
##3B51BF	1.00	6.74	3.12	6.74
#FFFFFF	6.74	1.00	21.00	1.00
#000000	3.12	21.00	1.00	21.00
##FFFFFF	6.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0062C3

Deuteranopia (green-blind)

#0056BD

Tritanopia (blue-blind)

#006C80

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3b51bf;
/* rgb */ color: rgb(59, 81, 191);
/* oklch */ color: oklch(48.4% 0.174 270.1);

Tailwind

colors: {
  custom: {
    50: '#8181d3',
    500: '#3b51bf',
    950: '#000000',
  },
}

SCSS

$custom: #3b51bf;
$custom-light: #8181d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3b51bf",
  "rgb": {
    "r": 59,
    "g": 81,
    "b": 191
  },
  "hsl": {
    "h": 230,
    "s": 52.8,
    "l": 49.02
  },
  "oklch": {
    "l": 0.48384,
    "c": 0.17376,
    "h": 270.1
  },
  "luminance": 0.10576
}

Semantic roles & 50–950 ramp

primary

#3B51BF

secondary

#CAC08C

accent

#C44CDC

background

#F8F7FD

surface

#F0EEFA

border

#CBC9D3

text

#0C0A14

muted

#7D7C83

Preview Lab

Preview with #3B51BF

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

Preview Lab → · Contrast checker → · Palette generator →