#515BB9#515BB9

#515BB9 is a mid, vivid blue. Relative luminance 0.127; OKLCH L 51.2% C 0.147 H 275.4°. Best body text is #FFFFFF at 5.92:1 contrast (WCAG AA passes).

Color values

HEX	#515BB9
RGB	rgb(81, 91, 185)
HSL	hsl(234, 43%, 52%)
HSV	hsv(234, 56%, 73%)
CMYK	cmyk(56.2%, 50.8%, 0%, 27.5%)
CIE-LAB	lab(42.36, 23.89, -51.08)
CIE-LCH	lch(42.36, 56.39, 295.07°)
OKLab	oklab(51.23% 0.0138 -0.1459)
OKLCH	oklch(51.23% 0.147 275.4)
XYZ	xyz(15.8886, 12.7332, 47.5100)
Luminance	0.1273 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#515BB9 #B9AF51

analogous

#518FB9 #515BB9 #7B51B9

triadic

#515BB9 #B9515B #5BB951

tetradic

#515BB9 #B9518F #B9AF51 #51B97B

square

#515BB9 #B9518F #B9AF51 #51B97B

split-complementary

#515BB9 #B97B51 #8FB951

monochromatic

#292F66 #3B4392 #515BB9 #7D84CB #A8ADDC

Accessibility & contrast

On white

5.92

#515BB9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.55

#515BB9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #515BB9

5.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##515BB9	#FFFFFF	#000000	##FFFFFF
##515BB9	1.00	5.92	3.55	5.92
#FFFFFF	5.92	1.00	21.00	1.00
#000000	3.55	21.00	1.00	21.00
##FFFFFF	5.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A68BC

Deuteranopia (green-blind)

#1960B7

Tritanopia (blue-blind)

#177081

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #515bb9;
/* rgb */ color: rgb(81, 91, 185);
/* oklch */ color: oklch(51.2% 0.147 275.4);

Tailwind

colors: {
  custom: {
    50: '#8a89cf',
    500: '#515bb9',
    950: '#000000',
  },
}

SCSS

$custom: #515bb9;
$custom-light: #8a89cf;
$custom-dark: #000000;

JSON

{
  "hex": "#515bb9",
  "rgb": {
    "r": 81,
    "g": 91,
    "b": 185
  },
  "hsl": {
    "h": 234.231,
    "s": 42.623,
    "l": 52.157
  },
  "oklch": {
    "l": 0.51231,
    "c": 0.1466,
    "h": 275.4
  },
  "luminance": 0.12734
}

Semantic roles & 50–950 ramp

primary

#515BB9

secondary

#CAC59C

accent

#C655D2

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0C0B14

muted

#7D7C82

Preview Lab

Preview with #515BB9

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

Preview Lab → · Contrast checker → · Palette generator →