#515CBB#515CBB

#515CBB is a mid, vivid blue. Relative luminance 0.130; OKLCH L 51.6% C 0.148 H 275.0°. Best body text is #FFFFFF at 5.84:1 contrast (WCAG AA passes).

Color values

HEX	#515CBB
RGB	rgb(81, 92, 187)
HSL	hsl(234, 44%, 53%)
HSV	hsv(234, 57%, 73%)
CMYK	cmyk(56.7%, 50.8%, 0%, 26.7%)
CIE-LAB	lab(42.75, 23.92, -51.62)
CIE-LCH	lch(42.75, 56.89, 294.87°)
OKLab	oklab(51.57% 0.0129 -0.1475)
OKLCH	oklch(51.57% 0.148 275)
XYZ	xyz(16.1872, 12.9903, 48.6585)
Luminance	0.1299 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#515CBB #BBB051

analogous

#5191BB #515CBB #7B51BB

triadic

#515CBB #BB515C #5CBB51

tetradic

#515CBB #BB5191 #BBB051 #51BB7B

square

#515CBB #BB5191 #BBB051 #51BB7B

split-complementary

#515CBB #BB7B51 #91BB51

monochromatic

#293069 #3A4495 #515CBB #7D85CC #A9AEDD

Accessibility & contrast

On white

5.84

#515CBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.60

#515CBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #515CBB

5.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##515CBB	#FFFFFF	#000000	##FFFFFF
##515CBB	1.00	5.84	3.60	5.84
#FFFFFF	5.84	1.00	21.00	1.00
#000000	3.60	21.00	1.00	21.00
##FFFFFF	5.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A6ABE

Deuteranopia (green-blind)

#1861B9

Tritanopia (blue-blind)

#127183

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #515cbb;
/* rgb */ color: rgb(81, 92, 187);
/* oklch */ color: oklch(51.6% 0.148 275.0);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#515cbb",
  "rgb": {
    "r": 81,
    "g": 92,
    "b": 187
  },
  "hsl": {
    "h": 233.774,
    "s": 43.802,
    "l": 52.549
  },
  "oklch": {
    "l": 0.51567,
    "c": 0.14809,
    "h": 275
  },
  "luminance": 0.12991
}

Semantic roles & 50–950 ramp

primary

#515CBB

secondary

#CBC69D

accent

#C654D4

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0D0B14

muted

#7D7C82

Preview Lab

Preview with #515CBB

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

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