#5151B0#5151B0

#5151B0 is a mid, vivid blue. Relative luminance 0.108; OKLCH L 48.7% C 0.147 H 279.4°. Best body text is #FFFFFF at 6.66:1 contrast (WCAG AA passes).

Color values

HEX	#5151B0
RGB	rgb(81, 81, 176)
HSL	hsl(240, 38%, 50%)
HSV	hsv(240, 54%, 69%)
CMYK	cmyk(54%, 54%, 0%, 31%)
CIE-LAB	lab(39.19, 27.25, -50.90)
CIE-LCH	lch(39.19, 57.73, 298.16°)
OKLab	oklab(48.66% 0.0241 -0.1455)
OKLCH	oklch(48.66% 0.148 279.4)
XYZ	xyz(14.1698, 10.7679, 42.3976)
Luminance	0.1077 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5151B0 #B0B051

analogous

#5180B0 #5151B0 #8051B0

triadic

#5151B0 #B05151 #51B051

tetradic

#5151B0 #B05180 #B0B051 #51B080

square

#5151B0 #B05180 #B0B051 #51B080

split-complementary

#5151B0 #B08051 #80B051

monochromatic

#2A2A5D #3D3D87 #5151B0 #7B7BC3 #A5A5D6

Accessibility & contrast

On white

6.66

#5151B0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.15

#5151B0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5151B0

6.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5151B0	#FFFFFF	#000000	##FFFFFF
##5151B0	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)

#1A60B3

Deuteranopia (green-blind)

#0759AE

Tritanopia (blue-blind)

#266678

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #5151b0;
/* rgb */ color: rgb(81, 81, 176);
/* oklch */ color: oklch(48.7% 0.147 279.4);

Tailwind

colors: {
  custom: {
    50: '#8982c8',
    500: '#5151b0',
    950: '#000000',
  },
}

SCSS

$custom: #5151b0;
$custom-light: #8982c8;
$custom-dark: #000000;

JSON

{
  "hex": "#5151b0",
  "rgb": {
    "r": 81,
    "g": 81,
    "b": 176
  },
  "hsl": {
    "h": 240,
    "s": 37.549,
    "l": 50.392
  },
  "oklch": {
    "l": 0.4866,
    "c": 0.1475,
    "h": 279.4
  },
  "luminance": 0.10769
}

Semantic roles & 50–950 ramp

primary

#5151B0

secondary

#C4C499

accent

#CE5ACE

background

#F8F7FC

surface

#F0EEF8

border

#CBC9D1

text

#0C0A13

muted

#7D7C82

Preview Lab

Preview with #5151B0

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

Preview Lab → · Contrast checker → · Palette generator →