#515DBB#515DBB

#515DBB is a mid, vivid blue. Relative luminance 0.132; OKLCH L 51.8% C 0.147 H 274.6°. Best body text is #FFFFFF at 5.78:1 contrast (WCAG AA passes).

Color values

HEX	#515DBB
RGB	rgb(81, 93, 187)
HSL	hsl(233, 44%, 53%)
HSV	hsv(233, 57%, 73%)
CMYK	cmyk(56.7%, 50.3%, 0%, 26.7%)
CIE-LAB	lab(43.01, 23.29, -51.20)
CIE-LCH	lch(43.01, 56.25, 294.46°)
OKLab	oklab(51.76% 0.0118 -0.1463)
OKLCH	oklch(51.76% 0.147 274.6)
XYZ	xyz(16.2744, 13.1647, 48.6875)
Luminance	0.1317 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#515DBB #BBAF51

analogous

#5192BB #515DBB #7A51BB

triadic

#515DBB #BB515D #5DBB51

tetradic

#515DBB #BB5192 #BBAF51 #51BB7A

square

#515DBB #BB5192 #BBAF51 #51BB7A

split-complementary

#515DBB #BB7A51 #92BB51

monochromatic

#293069 #3A4495 #515DBB #7D86CC #A9AFDD

Accessibility & contrast

On white

5.78

#515DBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.63

#515DBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #515DBB

5.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##515DBB	#FFFFFF	#000000	##FFFFFF
##515DBB	1.00	5.78	3.63	5.78
#FFFFFF	5.78	1.00	21.00	1.00
#000000	3.63	21.00	1.00	21.00
##FFFFFF	5.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D6ABE

Deuteranopia (green-blind)

#1B61B9

Tritanopia (blue-blind)

#127283

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #515dbb;
/* rgb */ color: rgb(81, 93, 187);
/* oklch */ color: oklch(51.8% 0.147 274.6);

Tailwind

colors: {
  custom: {
    50: '#8a8ad0',
    500: '#515dbb',
    950: '#000000',
  },
}

SCSS

$custom: #515dbb;
$custom-light: #8a8ad0;
$custom-dark: #000000;

JSON

{
  "hex": "#515dbb",
  "rgb": {
    "r": 81,
    "g": 93,
    "b": 187
  },
  "hsl": {
    "h": 233.208,
    "s": 43.802,
    "l": 52.549
  },
  "oklch": {
    "l": 0.51764,
    "c": 0.14676,
    "h": 274.6
  },
  "luminance": 0.13166
}

Semantic roles & 50–950 ramp

primary

#515DBB

secondary

#CBC69D

accent

#C554D4

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0D0B14

muted

#7D7C82

Preview Lab

Preview with #515DBB

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

Preview Lab → · Contrast checker → · Palette generator →