#5151D9#5151D9

#5151D9 is a mid, highly saturated blue. Relative luminance 0.126; OKLCH L 51.9% C 0.202 H 276.7°. Best body text is #FFFFFF at 5.95:1 contrast (WCAG AA passes).

Color values

HEX	#5151D9
RGB	rgb(81, 81, 217)
HSL	hsl(240, 64%, 58%)
HSV	hsv(240, 63%, 85%)
CMYK	cmyk(62.7%, 62.7%, 0%, 14.9%)
CIE-LAB	lab(42.22, 40.67, -69.80)
CIE-LCH	lch(42.22, 80.78, 300.23°)
OKLab	oklab(51.86% 0.0236 -0.2011)
OKLCH	oklch(51.86% 0.202 276.7)
XYZ	xyz(18.8561, 12.6424, 67.0787)
Luminance	0.1264 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5151D9 #D9D951

analogous

#5195D9 #5151D9 #9551D9

triadic

#5151D9 #D95151 #51D951

tetradic

#5151D9 #D95195 #D9D951 #51D995

square

#5151D9 #D95195 #D9D951 #51D995

split-complementary

#5151D9 #D99551 #95D951

monochromatic

#1F1F90 #2A2AC2 #5151D9 #8383E4 #B5B5EF

Accessibility & contrast

On white

5.95

#5151D9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.53

#5151D9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5151D9

5.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5151D9	#FFFFFF	#000000	##FFFFFF
##5151D9	1.00	5.95	3.53	5.95
#FFFFFF	5.95	1.00	21.00	1.00
#000000	3.53	21.00	1.00	21.00
##FFFFFF	5.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006ADD

Deuteranopia (green-blind)

#005ED6

Tritanopia (blue-blind)

#00738D

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #5151d9;
/* rgb */ color: rgb(81, 81, 217);
/* oklch */ color: oklch(51.9% 0.202 276.7);

Tailwind

colors: {
  custom: {
    50: '#9082e6',
    500: '#5151d9',
    950: '#000000',
  },
}

SCSS

$custom: #5151d9;
$custom-light: #9082e6;
$custom-dark: #000000;

JSON

{
  "hex": "#5151d9",
  "rgb": {
    "r": 81,
    "g": 81,
    "b": 217
  },
  "hsl": {
    "h": 240,
    "s": 64.151,
    "l": 58.431
  },
  "oklch": {
    "l": 0.51857,
    "c": 0.20247,
    "h": 276.7
  },
  "luminance": 0.12644
}

Semantic roles & 50–950 ramp

primary

#5151D9

secondary

#DEDEA8

accent

#E741E7

background

#F9F8FE

surface

#F2EFFC

border

#CCCAD5

text

#0E0A16

muted

#7E7C84

Preview Lab

Preview with #5151D9

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

Preview Lab → · Contrast checker → · Palette generator →