#5151B3#5151B3

#5151B3 is a mid, vivid blue. Relative luminance 0.109; OKLCH L 48.9% C 0.152 H 279.2°. Best body text is #FFFFFF at 6.61:1 contrast (WCAG AA passes).

Color values

HEX	#5151B3
RGB	rgb(81, 81, 179)
HSL	hsl(240, 39%, 51%)
HSV	hsv(240, 55%, 70%)
CMYK	cmyk(54.7%, 54.7%, 0%, 29.8%)
CIE-LAB	lab(39.39, 28.23, -52.34)
CIE-LCH	lch(39.39, 59.46, 298.34°)
OKLab	oklab(48.88% 0.0243 -0.1497)
OKLCH	oklch(48.88% 0.152 279.2)
XYZ	xyz(14.4699, 10.8879, 43.9782)
Luminance	0.1089 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5151B3 #B3B351

analogous

#5182B3 #5151B3 #8251B3

triadic

#5151B3 #B35151 #51B351

tetradic

#5151B3 #B35182 #B3B351 #51B382

square

#5151B3 #B35182 #B3B351 #51B382

split-complementary

#5151B3 #B38251 #82B351

monochromatic

#2A2A60 #3C3C8A #5151B3 #7C7CC6 #A6A6D8

Accessibility & contrast

On white

6.61

#5151B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.18

#5151B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5151B3

6.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5151B3	#FFFFFF	#000000	##FFFFFF
##5151B3	1.00	6.61	3.18	6.61
#FFFFFF	6.61	1.00	21.00	1.00
#000000	3.18	21.00	1.00	21.00
##FFFFFF	6.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1461B6

Deuteranopia (green-blind)

#0059B1

Tritanopia (blue-blind)

#23677A

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #5151b3;
/* rgb */ color: rgb(81, 81, 179);
/* oklch */ color: oklch(48.9% 0.152 279.2);

Tailwind

colors: {
  custom: {
    50: '#8a82ca',
    500: '#5151b3',
    950: '#000000',
  },
}

SCSS

$custom: #5151b3;
$custom-light: #8a82ca;
$custom-dark: #000000;

JSON

{
  "hex": "#5151b3",
  "rgb": {
    "r": 81,
    "g": 81,
    "b": 179
  },
  "hsl": {
    "h": 240,
    "s": 39.2,
    "l": 50.98
  },
  "oklch": {
    "l": 0.48877,
    "c": 0.1517,
    "h": 279.2
  },
  "luminance": 0.10889
}

Semantic roles & 50–950 ramp

primary

#5151B3

secondary

#C6C69A

accent

#CF59CF

background

#F8F7FC

surface

#F0EEF8

border

#CBC9D1

text

#0C0A13

muted

#7D7C82

Preview Lab

Preview with #5151B3

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

Preview Lab → · Contrast checker → · Palette generator →