#4B51BB#4B51BB

#4B51BB is a mid, vivid blue. Relative luminance 0.110; OKLCH L 49.0% C 0.164 H 276.1°. Best body text is #FFFFFF at 6.58:1 contrast (WCAG AA passes).

Color values

HEX	#4B51BB
RGB	rgb(75, 81, 187)
HSL	hsl(237, 45%, 51%)
HSV	hsv(237, 60%, 73%)
CMYK	cmyk(59.9%, 56.7%, 0%, 26.7%)
CIE-LAB	lab(39.53, 29.73, -56.84)
CIE-LCH	lch(39.53, 64.14, 297.61°)
OKLab	oklab(49.05% 0.0174 -0.1632)
OKLCH	oklch(49.05% 0.164 276.1)
XYZ	xyz(14.8108, 10.9674, 48.3405)
Luminance	0.1097 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.56

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4B51BB #BBB54B

analogous

#4B89BB #4B51BB #7D4BBB

triadic

#4B51BB #BB4B51 #51BB4B

tetradic

#4B51BB #BB4B89 #BBB54B #4BBB7D

square

#4B51BB #BB4B89 #BBB54B #4BBB7D

split-complementary

#4B51BB #BB7D4B #89BB4B

monochromatic

#262A65 #373C92 #4B51BB #777CCC #A4A7DD

Accessibility & contrast

On white

6.58

#4B51BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.19

#4B51BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4B51BB

6.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4B51BB	#FFFFFF	#000000	##FFFFFF
##4B51BB	1.00	6.58	3.19	6.58
#FFFFFF	6.58	1.00	21.00	1.00
#000000	3.19	21.00	1.00	21.00
##FFFFFF	6.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0062BF

Deuteranopia (green-blind)

#0058B9

Tritanopia (blue-blind)

#006A7E

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #4b51bb;
/* rgb */ color: rgb(75, 81, 187);
/* oklch */ color: oklch(49.0% 0.164 276.1);

Tailwind

colors: {
  custom: {
    50: '#8881d0',
    500: '#4b51bb',
    950: '#000000',
  },
}

SCSS

$custom: #4b51bb;
$custom-light: #8881d0;
$custom-dark: #000000;

JSON

{
  "hex": "#4b51bb",
  "rgb": {
    "r": 75,
    "g": 81,
    "b": 187
  },
  "hsl": {
    "h": 236.786,
    "s": 45.161,
    "l": 51.373
  },
  "oklch": {
    "l": 0.49046,
    "c": 0.16408,
    "h": 276.1
  },
  "luminance": 0.10969
}

Semantic roles & 50–950 ramp

primary

#4B51BB

secondary

#CAC798

accent

#CE53D5

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0C0A14

muted

#7D7C82

Preview Lab

Preview with #4B51BB

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

Preview Lab → · Contrast checker → · Palette generator →