#3B51CF#3B51CF

#3B51CF is a mid, vivid blue. Relative luminance 0.113; OKLCH L 49.7% C 0.195 H 270.1°. Best body text is #FFFFFF at 6.43:1 contrast (WCAG AA passes).

Color values

HEX	#3B51CF
RGB	rgb(59, 81, 207)
HSL	hsl(231, 61%, 52%)
HSV	hsv(231, 71%, 81%)
CMYK	cmyk(71.5%, 60.9%, 0%, 18.8%)
CIE-LAB	lab(40.11, 34.25, -67.55)
CIE-LCH	lch(40.11, 75.74, 296.88°)
OKLab	oklab(49.71% 0.0002 -0.195)
OKLCH	oklch(49.71% 0.195 270.1)
XYZ	xyz(16.0047, 11.3180, 60.3605)
Luminance	0.1132 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B51CF #CFB93B

analogous

#3B9BCF #3B51CF #6F3BCF

triadic

#3B51CF #CF3B51 #51CF3B

tetradic

#3B51CF #CF3B9B #CFB93B #3BCF6F

square

#3B51CF #CF3B9B #CFB93B #3BCF6F

split-complementary

#3B51CF #CF6F3B #9BCF3B

monochromatic

#1C2973 #283BA5 #3B51CF #6C7DDB #9DA8E7

Accessibility & contrast

On white

6.43

#3B51CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.26

#3B51CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3B51CF

6.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B51CF	#FFFFFF	#000000	##FFFFFF
##3B51CF	1.00	6.43	3.26	6.43
#FFFFFF	6.43	1.00	21.00	1.00
#000000	3.26	21.00	1.00	21.00
##FFFFFF	6.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0066D3

Deuteranopia (green-blind)

#0058CD

Tritanopia (blue-blind)

#007188

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #3b51cf;
/* rgb */ color: rgb(59, 81, 207);
/* oklch */ color: oklch(49.7% 0.195 270.1);

Tailwind

colors: {
  custom: {
    50: '#8581df',
    500: '#3b51cf',
    950: '#000000',
  },
}

SCSS

$custom: #3b51cf;
$custom-light: #8581df;
$custom-dark: #000000;

JSON

{
  "hex": "#3b51cf",
  "rgb": {
    "r": 59,
    "g": 81,
    "b": 207
  },
  "hsl": {
    "h": 231.081,
    "s": 60.656,
    "l": 52.157
  },
  "oklch": {
    "l": 0.4971,
    "c": 0.19503,
    "h": 270.1
  },
  "luminance": 0.1132
}

Semantic roles & 50–950 ramp

primary

#3B51CF

secondary

#D3CA93

accent

#CC44E4

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0C0A15

muted

#7D7C83

Preview Lab

Preview with #3B51CF

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

Preview Lab → · Contrast checker → · Palette generator →