#5151BC#5151BC

#5151BC is a mid, vivid blue. Relative luminance 0.113; OKLCH L 49.5% C 0.164 H 278.6°. Best body text is #FFFFFF at 6.46:1 contrast (WCAG AA passes).

Color values

HEX	#5151BC
RGB	rgb(81, 81, 188)
HSL	hsl(240, 44%, 53%)
HSV	hsv(240, 57%, 74%)
CMYK	cmyk(56.9%, 56.9%, 0%, 26.3%)
CIE-LAB	lab(40.02, 31.17, -56.60)
CIE-LCH	lch(40.02, 64.62, 298.84°)
OKLab	oklab(49.55% 0.0245 -0.1623)
OKLCH	oklch(49.55% 0.164 278.6)
XYZ	xyz(15.4100, 11.2640, 48.9293)
Luminance	0.1127 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5151BC #BCBC51

analogous

#5186BC #5151BC #8651BC

triadic

#5151BC #BC5151 #51BC51

tetradic

#5151BC #BC5186 #BCBC51 #51BC86

square

#5151BC #BC5186 #BCBC51 #51BC86

split-complementary

#5151BC #BC8651 #86BC51

monochromatic

#29296A #3A3A96 #5151BC #7D7DCD #A9A9DE

Accessibility & contrast

On white

6.46

#5151BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.25

#5151BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5151BC

6.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5151BC	#FFFFFF	#000000	##FFFFFF
##5151BC	1.00	6.46	3.25	6.46
#FFFFFF	6.46	1.00	21.00	1.00
#000000	3.25	21.00	1.00	21.00
##FFFFFF	6.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063C0

Deuteranopia (green-blind)

#005ABA

Tritanopia (blue-blind)

#146A7E

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #5151bc;
/* rgb */ color: rgb(81, 81, 188);
/* oklch */ color: oklch(49.5% 0.164 278.6);

Tailwind

colors: {
  custom: {
    50: '#8b82d1',
    500: '#5151bc',
    950: '#000000',
  },
}

SCSS

$custom: #5151bc;
$custom-light: #8b82d1;
$custom-dark: #000000;

JSON

{
  "hex": "#5151bc",
  "rgb": {
    "r": 81,
    "g": 81,
    "b": 188
  },
  "hsl": {
    "h": 240,
    "s": 44.398,
    "l": 52.745
  },
  "oklch": {
    "l": 0.49547,
    "c": 0.16412,
    "h": 278.6
  },
  "luminance": 0.11265
}

Semantic roles & 50–950 ramp

primary

#5151BC

secondary

#CCCC9D

accent

#D454D4

background

#F9F7FC

surface

#F1EEF9

border

#CBC9D2

text

#0D0A14

muted

#7E7C82

Preview Lab

Preview with #5151BC

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

Preview Lab → · Contrast checker → · Palette generator →