#4B51DD#4B51DD

#4B51DD is a mid, highly saturated blue. Relative luminance 0.126; OKLCH L 51.8% C 0.209 H 274.5°. Best body text is #FFFFFF at 5.97:1 contrast (WCAG AA passes).

Color values

HEX	#4B51DD
RGB	rgb(75, 81, 221)
HSL	hsl(238, 68%, 58%)
HSV	hsv(238, 66%, 87%)
CMYK	cmyk(66.1%, 63.3%, 0%, 13.3%)
CIE-LAB	lab(42.15, 41.13, -72.21)
CIE-LCH	lch(42.15, 83.10, 299.67°)
OKLab	oklab(51.81% 0.0164 -0.2083)
OKLCH	oklch(51.81% 0.209 274.5)
XYZ	xyz(18.8909, 12.5995, 69.8290)
Luminance	0.1260 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4B51DD #DDD74B

analogous

#4B9ADD #4B51DD #8E4BDD

triadic

#4B51DD #DD4B51 #51DD4B

tetradic

#4B51DD #DD4B9A #DDD74B #4BDD8E

square

#4B51DD #DD4B9A #DDD74B #4BDD8E

split-complementary

#4B51DD #DD8E4B #9ADD4B

monochromatic

#1C2092 #252CC5 #4B51DD #7E83E7 #B2B5F0

Accessibility & contrast

On white

5.97

#4B51DD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.52

#4B51DD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4B51DD

5.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4B51DD	#FFFFFF	#000000	##FFFFFF
##4B51DD	1.00	5.97	3.52	5.97
#FFFFFF	5.97	1.00	21.00	1.00
#000000	3.52	21.00	1.00	21.00
##FFFFFF	5.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006AE1

Deuteranopia (green-blind)

#005DDA

Tritanopia (blue-blind)

#007590

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #4b51dd;
/* rgb */ color: rgb(75, 81, 221);
/* oklch */ color: oklch(51.8% 0.209 274.5);

Tailwind

colors: {
  custom: {
    50: '#8e82e9',
    500: '#4b51dd',
    950: '#000000',
  },
}

SCSS

$custom: #4b51dd;
$custom-light: #8e82e9;
$custom-dark: #000000;

JSON

{
  "hex": "#4b51dd",
  "rgb": {
    "r": 75,
    "g": 81,
    "b": 221
  },
  "hsl": {
    "h": 237.534,
    "s": 68.224,
    "l": 58.039
  },
  "oklch": {
    "l": 0.51807,
    "c": 0.20896,
    "h": 274.5
  },
  "luminance": 0.12601
}

Semantic roles & 50–950 ramp

primary

#4B51DD

secondary

#DFDDA5

accent

#E43DEB

background

#F9F8FE

surface

#F2EFFD

border

#CCCAD5

text

#0E0A16

muted

#7E7C84

Preview Lab

Preview with #4B51DD

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

Preview Lab → · Contrast checker → · Palette generator →