#515BBB#515BBB

#515BBB is a mid, vivid blue. Relative luminance 0.128; OKLCH L 51.4% C 0.149 H 275.4°. Best body text is #FFFFFF at 5.89:1 contrast (WCAG AA passes).

Color values

HEX	#515BBB
RGB	rgb(81, 91, 187)
HSL	hsl(234, 44%, 53%)
HSV	hsv(234, 57%, 73%)
CMYK	cmyk(56.7%, 51.3%, 0%, 26.7%)
CIE-LAB	lab(42.49, 24.55, -52.04)
CIE-LCH	lch(42.49, 57.54, 295.26°)
OKLab	oklab(51.37% 0.014 -0.1488)
OKLCH	oklch(51.37% 0.149 275.4)
XYZ	xyz(16.1012, 12.8182, 48.6298)
Luminance	0.1282 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#515BBB #BBB151

analogous

#5190BB #515BBB #7C51BB

triadic

#515BBB #BB515B #5BBB51

tetradic

#515BBB #BB5190 #BBB151 #51BB7C

square

#515BBB #BB5190 #BBB151 #51BB7C

split-complementary

#515BBB #BB7C51 #90BB51

monochromatic

#292F69 #3A4395 #515BBB #7D84CC #A9AEDD

Accessibility & contrast

On white

5.89

#515BBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.56

#515BBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #515BBB

5.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##515BBB	#FFFFFF	#000000	##FFFFFF
##515BBB	1.00	5.89	3.56	5.89
#FFFFFF	5.89	1.00	21.00	1.00
#000000	3.56	21.00	1.00	21.00
##FFFFFF	5.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2869BE

Deuteranopia (green-blind)

#1460B9

Tritanopia (blue-blind)

#137182

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #515bbb;
/* rgb */ color: rgb(81, 91, 187);
/* oklch */ color: oklch(51.4% 0.149 275.4);

Tailwind

colors: {
  custom: {
    50: '#8a89d0',
    500: '#515bbb',
    950: '#000000',
  },
}

SCSS

$custom: #515bbb;
$custom-light: #8a89d0;
$custom-dark: #000000;

JSON

{
  "hex": "#515bbb",
  "rgb": {
    "r": 81,
    "g": 91,
    "b": 187
  },
  "hsl": {
    "h": 234.34,
    "s": 43.802,
    "l": 52.549
  },
  "oklch": {
    "l": 0.5137,
    "c": 0.14942,
    "h": 275.4
  },
  "luminance": 0.12819
}

Semantic roles & 50–950 ramp

primary

#515BBB

secondary

#CBC79D

accent

#C854D4

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0D0B14

muted

#7D7C82

Preview Lab

Preview with #515BBB

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

Preview Lab → · Contrast checker → · Palette generator →