#5151BF#5151BF

#5151BF is a mid, vivid blue. Relative luminance 0.114; OKLCH L 49.8% C 0.168 H 278.4°. Best body text is #FFFFFF at 6.40:1 contrast (WCAG AA passes).

Color values

HEX	#5151BF
RGB	rgb(81, 81, 191)
HSL	hsl(240, 46%, 53%)
HSV	hsv(240, 58%, 75%)
CMYK	cmyk(57.6%, 57.6%, 0%, 25.1%)
CIE-LAB	lab(40.24, 32.15, -58.01)
CIE-LCH	lch(40.24, 66.32, 299.00°)
OKLab	oklab(49.78% 0.0245 -0.1664)
OKLCH	oklch(49.78% 0.168 278.4)
XYZ	xyz(15.7367, 11.3947, 50.6503)
Luminance	0.1140 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5151BF #BFBF51

analogous

#5188BF #5151BF #8851BF

triadic

#5151BF #BF5151 #51BF51

tetradic

#5151BF #BF5188 #BFBF51 #51BF88

square

#5151BF #BF5188 #BFBF51 #51BF88

split-complementary

#5151BF #BF8851 #88BF51

monochromatic

#28286D #39399A #5151BF #7E7ECF #AAAAE0

Accessibility & contrast

On white

6.40

#5151BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.28

#5151BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5151BF

6.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5151BF	#FFFFFF	#000000	##FFFFFF
##5151BF	1.00	6.40	3.28	6.40
#FFFFFF	6.40	1.00	21.00	1.00
#000000	3.28	21.00	1.00	21.00
##FFFFFF	6.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063C3

Deuteranopia (green-blind)

#005ABD

Tritanopia (blue-blind)

#0D6B80

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #5151bf;
/* rgb */ color: rgb(81, 81, 191);
/* oklch */ color: oklch(49.8% 0.168 278.4);

Tailwind

colors: {
  custom: {
    50: '#8c82d3',
    500: '#5151bf',
    950: '#000000',
  },
}

SCSS

$custom: #5151bf;
$custom-light: #8c82d3;
$custom-dark: #000000;

JSON

{
  "hex": "#5151bf",
  "rgb": {
    "r": 81,
    "g": 81,
    "b": 191
  },
  "hsl": {
    "h": 240,
    "s": 46.218,
    "l": 53.333
  },
  "oklch": {
    "l": 0.49776,
    "c": 0.16821,
    "h": 278.4
  },
  "luminance": 0.11396
}

Semantic roles & 50–950 ramp

primary

#5151BF

secondary

#CECE9E

accent

#D652D6

background

#F9F7FD

surface

#F1EEFA

border

#CBC9D3

text

#0D0A14

muted

#7E7C83

Preview Lab

Preview with #5151BF

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

Preview Lab → · Contrast checker → · Palette generator →