#4B51BF#4B51BF

#4B51BF is a mid, vivid blue. Relative luminance 0.111; OKLCH L 49.4% C 0.170 H 275.9°. Best body text is #FFFFFF at 6.50:1 contrast (WCAG AA passes).

Color values

HEX	#4B51BF
RGB	rgb(75, 81, 191)
HSL	hsl(237, 48%, 52%)
HSV	hsv(237, 61%, 75%)
CMYK	cmyk(60.7%, 57.6%, 0%, 25.1%)
CIE-LAB	lab(39.82, 31.07, -58.71)
CIE-LCH	lch(39.82, 66.42, 297.89°)
OKLab	oklab(49.36% 0.0174 -0.1686)
OKLCH	oklch(49.36% 0.17 275.9)
XYZ	xyz(15.2450, 11.1411, 50.6272)
Luminance	0.1114 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4B51BF #BFB94B

analogous

#4B8BBF #4B51BF #7F4BBF

triadic

#4B51BF #BF4B51 #51BF4B

tetradic

#4B51BF #BF4B8B #BFB94B #4BBF7F

square

#4B51BF #BF4B8B #BFB94B #4BBF7F

split-complementary

#4B51BF #BF7F4B #8BBF4B

monochromatic

#26296A #363B97 #4B51BF #787DCF #A5A8DF

Accessibility & contrast

On white

6.50

#4B51BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.23

#4B51BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4B51BF

6.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4B51BF	#FFFFFF	#000000	##FFFFFF
##4B51BF	1.00	6.50	3.23	6.50
#FFFFFF	6.50	1.00	21.00	1.00
#000000	3.23	21.00	1.00	21.00
##FFFFFF	6.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063C3

Deuteranopia (green-blind)

#0059BD

Tritanopia (blue-blind)

#006B80

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #4b51bf;
/* rgb */ color: rgb(75, 81, 191);
/* oklch */ color: oklch(49.4% 0.170 275.9);

Tailwind

colors: {
  custom: {
    50: '#8982d3',
    500: '#4b51bf',
    950: '#000000',
  },
}

SCSS

$custom: #4b51bf;
$custom-light: #8982d3;
$custom-dark: #000000;

JSON

{
  "hex": "#4b51bf",
  "rgb": {
    "r": 75,
    "g": 81,
    "b": 191
  },
  "hsl": {
    "h": 236.897,
    "s": 47.541,
    "l": 52.157
  },
  "oklch": {
    "l": 0.49355,
    "c": 0.16955,
    "h": 275.9
  },
  "luminance": 0.11142
}

Semantic roles & 50–950 ramp

primary

#4B51BF

secondary

#CCCA9A

accent

#D051D7

background

#F8F7FD

surface

#F0EEFA

border

#CBC9D3

text

#0D0A14

muted

#7D7C83

Preview Lab

Preview with #4B51BF

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

Preview Lab → · Contrast checker → · Palette generator →