#4B51CD#4B51CD

#4B51CD is a mid, vivid blue. Relative luminance 0.118; OKLCH L 50.5% C 0.188 H 275.3°. Best body text is #FFFFFF at 6.25:1 contrast (WCAG AA passes).

Color values

HEX	#4B51CD
RGB	rgb(75, 81, 205)
HSL	hsl(237, 57%, 55%)
HSV	hsv(237, 63%, 80%)
CMYK	cmyk(63.4%, 60.5%, 0%, 19.6%)
CIE-LAB	lab(40.88, 35.78, -65.11)
CIE-LCH	lch(40.88, 74.30, 298.79°)
OKLab	oklab(50.47% 0.0172 -0.1875)
OKLCH	oklch(50.47% 0.188 275.3)
XYZ	xyz(16.8599, 11.7871, 59.1324)
Luminance	0.1179 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4B51CD #CDC74B

analogous

#4B92CD #4B51CD #864BCD

triadic

#4B51CD #CD4B51 #51CD4B

tetradic

#4B51CD #CD4B92 #CDC74B #4BCD86

square

#4B51CD #CD4B92 #CDC74B #4BCD86

split-complementary

#4B51CD #CD864B #92CD4B

monochromatic

#22267B #3035AB #4B51CD #7B7FDA #ABAEE8

Accessibility & contrast

On white

6.25

#4B51CD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.36

#4B51CD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4B51CD

6.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4B51CD	#FFFFFF	#000000	##FFFFFF
##4B51CD	1.00	6.25	3.36	6.25
#FFFFFF	6.25	1.00	21.00	1.00
#000000	3.36	21.00	1.00	21.00
##FFFFFF	6.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0066D1

Deuteranopia (green-blind)

#005BCB

Tritanopia (blue-blind)

#007087

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #4b51cd;
/* rgb */ color: rgb(75, 81, 205);
/* oklch */ color: oklch(50.5% 0.188 275.3);

Tailwind

colors: {
  custom: {
    50: '#8b82dd',
    500: '#4b51cd',
    950: '#000000',
  },
}

SCSS

$custom: #4b51cd;
$custom-light: #8b82dd;
$custom-dark: #000000;

JSON

{
  "hex": "#4b51cd",
  "rgb": {
    "r": 75,
    "g": 81,
    "b": 205
  },
  "hsl": {
    "h": 237.231,
    "s": 56.522,
    "l": 54.902
  },
  "oklch": {
    "l": 0.50471,
    "c": 0.18827,
    "h": 275.3
  },
  "luminance": 0.11788
}

Semantic roles & 50–950 ramp

primary

#4B51CD

secondary

#D5D39F

accent

#D948E0

background

#F9F7FD

surface

#F1EEFB

border

#CBC9D4

text

#0D0A15

muted

#7E7C83

Preview Lab

Preview with #4B51CD

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

Preview Lab → · Contrast checker → · Palette generator →