#515BBC#515BBC

#515BBC is a mid, vivid blue. Relative luminance 0.129; OKLCH L 51.4% C 0.151 H 275.3°. Best body text is #FFFFFF at 5.88:1 contrast (WCAG AA passes).

Color values

HEX	#515BBC
RGB	rgb(81, 91, 188)
HSL	hsl(234, 44%, 53%)
HSV	hsv(234, 57%, 74%)
CMYK	cmyk(56.9%, 51.6%, 0%, 26.3%)
CIE-LAB	lab(42.55, 24.89, -52.51)
CIE-LCH	lch(42.55, 58.11, 295.36°)
OKLab	oklab(51.44% 0.014 -0.1502)
OKLCH	oklch(51.44% 0.151 275.3)
XYZ	xyz(16.2086, 12.8612, 49.1955)
Luminance	0.1286 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#515BBC #BCB251

analogous

#5190BC #515BBC #7D51BC

triadic

#515BBC #BC515B #5BBC51

tetradic

#515BBC #BC5190 #BCB251 #51BC7D

square

#515BBC #BC5190 #BCB251 #51BC7D

split-complementary

#515BBC #BC7D51 #90BC51

monochromatic

#292F6A #3A4296 #515BBC #7D85CD #A9AEDE

Accessibility & contrast

On white

5.88

#515BBC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.57

#515BBC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #515BBC

5.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##515BBC	#FFFFFF	#000000	##FFFFFF
##515BBC	1.00	5.88	3.57	5.88
#FFFFFF	5.88	1.00	21.00	1.00
#000000	3.57	21.00	1.00	21.00
##FFFFFF	5.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2669BF

Deuteranopia (green-blind)

#1160BA

Tritanopia (blue-blind)

#107183

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #515bbc;
/* rgb */ color: rgb(81, 91, 188);
/* oklch */ color: oklch(51.4% 0.151 275.3);

Tailwind

colors: {
  custom: {
    50: '#8b89d1',
    500: '#515bbc',
    950: '#000000',
  },
}

SCSS

$custom: #515bbc;
$custom-light: #8b89d1;
$custom-dark: #000000;

JSON

{
  "hex": "#515bbc",
  "rgb": {
    "r": 81,
    "g": 91,
    "b": 188
  },
  "hsl": {
    "h": 234.393,
    "s": 44.398,
    "l": 52.745
  },
  "oklch": {
    "l": 0.51441,
    "c": 0.15083,
    "h": 275.3
  },
  "luminance": 0.12862
}

Semantic roles & 50–950 ramp

primary

#515BBC

secondary

#CCC79D

accent

#C854D4

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0D0B14

muted

#7D7C82

Preview Lab

Preview with #515BBC

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

Preview Lab → · Contrast checker → · Palette generator →