#4B51CF#4B51CF

#4B51CF is a mid, vivid blue. Relative luminance 0.119; OKLCH L 50.6% C 0.191 H 275.2°. Best body text is #FFFFFF at 6.22:1 contrast (WCAG AA passes).

Color values

HEX	#4B51CF
RGB	rgb(75, 81, 207)
HSL	hsl(237, 58%, 55%)
HSV	hsv(237, 64%, 81%)
CMYK	cmyk(63.8%, 60.9%, 0%, 18.8%)
CIE-LAB	lab(41.03, 36.45, -66.01)
CIE-LCH	lch(41.03, 75.41, 298.91°)
OKLab	oklab(50.64% 0.0172 -0.1901)
OKLCH	oklch(50.64% 0.191 275.2)
XYZ	xyz(17.1029, 11.8843, 60.4120)
Luminance	0.1189 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4B51CF #CFC94B

analogous

#4B93CF #4B51CF #874BCF

triadic

#4B51CF #CF4B51 #51CF4B

tetradic

#4B51CF #CF4B93 #CFC94B #4BCF87

square

#4B51CF #CF4B93 #CFC94B #4BCF87

split-complementary

#4B51CF #CF874B #93CF4B

monochromatic

#22267E #2E34AE #4B51CF #7B80DC #ACAEE9

Accessibility & contrast

On white

6.22

#4B51CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.38

#4B51CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4B51CF

6.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4B51CF	#FFFFFF	#000000	##FFFFFF
##4B51CF	1.00	6.22	3.38	6.22
#FFFFFF	6.22	1.00	21.00	1.00
#000000	3.38	21.00	1.00	21.00
##FFFFFF	6.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0067D3

Deuteranopia (green-blind)

#005BCD

Tritanopia (blue-blind)

#007088

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #4b51cf;
/* rgb */ color: rgb(75, 81, 207);
/* oklch */ color: oklch(50.6% 0.191 275.2);

Tailwind

colors: {
  custom: {
    50: '#8b82df',
    500: '#4b51cf',
    950: '#000000',
  },
}

SCSS

$custom: #4b51cf;
$custom-light: #8b82df;
$custom-dark: #000000;

JSON

{
  "hex": "#4b51cf",
  "rgb": {
    "r": 75,
    "g": 81,
    "b": 207
  },
  "hsl": {
    "h": 237.273,
    "s": 57.895,
    "l": 55.294
  },
  "oklch": {
    "l": 0.50635,
    "c": 0.19089,
    "h": 275.2
  },
  "luminance": 0.11886
}

Semantic roles & 50–950 ramp

primary

#4B51CF

secondary

#D6D49F

accent

#DA47E1

background

#F9F7FD

surface

#F1EEFB

border

#CBC9D4

text

#0D0A15

muted

#7E7C83

Preview Lab

Preview with #4B51CF

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

Preview Lab → · Contrast checker → · Palette generator →