#4E51B3#4E51B3

#4E51B3 is a mid, vivid blue. Relative luminance 0.108; OKLCH L 48.7% C 0.152 H 277.8°. Best body text is #FFFFFF at 6.66:1 contrast (WCAG AA passes).

Color values

HEX	#4E51B3
RGB	rgb(78, 81, 179)
HSL	hsl(238, 40%, 50%)
HSV	hsv(238, 56%, 70%)
CMYK	cmyk(56.4%, 54.7%, 0%, 29.8%)
CIE-LAB	lab(39.17, 27.62, -52.70)
CIE-LCH	lch(39.17, 59.50, 297.66°)
OKLab	oklab(48.66% 0.0207 -0.1509)
OKLCH	oklch(48.66% 0.152 277.8)
XYZ	xyz(14.2184, 10.7583, 43.9664)
Luminance	0.1076 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4E51B3 #B3B04E

analogous

#4E83B3 #4E51B3 #7D4EB3

triadic

#4E51B3 #B34E51 #51B34E

tetradic

#4E51B3 #B34E83 #B3B04E #4EB37D

square

#4E51B3 #B34E83 #B3B04E #4EB37D

split-complementary

#4E51B3 #B37D4E #83B34E

monochromatic

#282A5E #3B3D89 #4E51B3 #797BC5 #A4A5D8

Accessibility & contrast

On white

6.66

#4E51B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.15

#4E51B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4E51B3

6.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4E51B3	#FFFFFF	#000000	##FFFFFF
##4E51B3	1.00	6.66	3.15	6.66
#FFFFFF	6.66	1.00	21.00	1.00
#000000	3.15	21.00	1.00	21.00
##FFFFFF	6.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1260B6

Deuteranopia (green-blind)

#0058B1

Tritanopia (blue-blind)

#17687A

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #4e51b3;
/* rgb */ color: rgb(78, 81, 179);
/* oklch */ color: oklch(48.7% 0.152 277.8);

Tailwind

colors: {
  custom: {
    50: '#8881ca',
    500: '#4e51b3',
    950: '#000000',
  },
}

SCSS

$custom: #4e51b3;
$custom-light: #8881ca;
$custom-dark: #000000;

JSON

{
  "hex": "#4e51b3",
  "rgb": {
    "r": 78,
    "g": 81,
    "b": 179
  },
  "hsl": {
    "h": 238.218,
    "s": 39.921,
    "l": 50.392
  },
  "oklch": {
    "l": 0.48656,
    "c": 0.15232,
    "h": 277.8
  },
  "luminance": 0.10759
}

Semantic roles & 50–950 ramp

primary

#4E51B3

secondary

#C5C498

accent

#CC58D0

background

#F8F7FC

surface

#F0EEF8

border

#CBC9D1

text

#0C0A13

muted

#7D7C82

Preview Lab

Preview with #4E51B3

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

Preview Lab → · Contrast checker → · Palette generator →