#515CB5#515CB5

#515CB5 is a mid, vivid blue. Relative luminance 0.127; OKLCH L 51.2% C 0.140 H 275.0°. Best body text is #FFFFFF at 5.92:1 contrast (WCAG AA passes).

Color values

HEX	#515CB5
RGB	rgb(81, 92, 181)
HSL	hsl(233, 40%, 51%)
HSV	hsv(233, 55%, 71%)
CMYK	cmyk(55.2%, 49.2%, 0%, 29%)
CIE-LAB	lab(42.37, 21.93, -48.72)
CIE-LCH	lch(42.37, 53.43, 294.23°)
OKLab	oklab(51.16% 0.0123 -0.139)
OKLCH	oklch(51.16% 0.14 275)
XYZ	xyz(15.5583, 12.7388, 45.3461)
Luminance	0.1274 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#515CB5 #B5AA51

analogous

#518EB5 #515CB5 #7851B5

triadic

#515CB5 #B5515C #5CB551

tetradic

#515CB5 #B5518E #B5AA51 #51B578

square

#515CB5 #B5518E #B5AA51 #51B578

split-complementary

#515CB5 #B57851 #8EB551

monochromatic

#2A3062 #3C458D #515CB5 #7C84C7 #A7ACDA

Accessibility & contrast

On white

5.92

#515CB5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.55

#515CB5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #515CB5

5.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##515CB5	#FFFFFF	#000000	##FFFFFF
##515CB5	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)

#3168B8

Deuteranopia (green-blind)

#2360B3

Tritanopia (blue-blind)

#1D7080

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #515cb5;
/* rgb */ color: rgb(81, 92, 181);
/* oklch */ color: oklch(51.2% 0.140 275.0);

Tailwind

colors: {
  custom: {
    50: '#8a8acc',
    500: '#515cb5',
    950: '#000000',
  },
}

SCSS

$custom: #515cb5;
$custom-light: #8a8acc;
$custom-dark: #000000;

JSON

{
  "hex": "#515cb5",
  "rgb": {
    "r": 81,
    "g": 92,
    "b": 181
  },
  "hsl": {
    "h": 233.4,
    "s": 40.323,
    "l": 51.373
  },
  "oklch": {
    "l": 0.51156,
    "c": 0.13956,
    "h": 275
  },
  "luminance": 0.1274
}

Semantic roles & 50–950 ramp

primary

#515CB5

secondary

#C7C29B

accent

#C358D0

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0C0B13

muted

#7D7C82

Preview Lab

Preview with #515CB5

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

Preview Lab → · Contrast checker → · Palette generator →