#515BB5#515BB5

#515BB5 is a mid, vivid blue. Relative luminance 0.126; OKLCH L 51.0% C 0.141 H 275.5°. Best body text is #FFFFFF at 5.98:1 contrast (WCAG AA passes).

Color values

HEX	#515BB5
RGB	rgb(81, 91, 181)
HSL	hsl(234, 40%, 51%)
HSV	hsv(234, 55%, 71%)
CMYK	cmyk(55.2%, 49.7%, 0%, 29%)
CIE-LAB	lab(42.10, 22.56, -49.15)
CIE-LCH	lch(42.10, 54.08, 294.66°)
OKLab	oklab(50.96% 0.0134 -0.1403)
OKLCH	oklch(50.96% 0.141 275.5)
XYZ	xyz(15.4722, 12.5666, 45.3174)
Luminance	0.1257 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#515BB5 #B5AB51

analogous

#518DB5 #515BB5 #7951B5

triadic

#515BB5 #B5515B #5BB551

tetradic

#515BB5 #B5518D #B5AB51 #51B579

square

#515BB5 #B5518D #B5AB51 #51B579

split-complementary

#515BB5 #B57951 #8DB551

monochromatic

#2A2F62 #3C448D #515BB5 #7C83C7 #A7ACDA

Accessibility & contrast

On white

5.98

#515BB5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.51

#515BB5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #515BB5

5.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##515BB5	#FFFFFF	#000000	##FFFFFF
##515BB5	1.00	5.98	3.51	5.98
#FFFFFF	5.98	1.00	21.00	1.00
#000000	3.51	21.00	1.00	21.00
##FFFFFF	5.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F68B8

Deuteranopia (green-blind)

#215FB3

Tritanopia (blue-blind)

#1E6F7F

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #515bb5;
/* rgb */ color: rgb(81, 91, 181);
/* oklch */ color: oklch(51.0% 0.141 275.5);

Tailwind

colors: {
  custom: {
    50: '#8a89cc',
    500: '#515bb5',
    950: '#000000',
  },
}

SCSS

$custom: #515bb5;
$custom-light: #8a89cc;
$custom-dark: #000000;

JSON

{
  "hex": "#515bb5",
  "rgb": {
    "r": 81,
    "g": 91,
    "b": 181
  },
  "hsl": {
    "h": 234,
    "s": 40.323,
    "l": 51.373
  },
  "oklch": {
    "l": 0.50956,
    "c": 0.14092,
    "h": 275.5
  },
  "luminance": 0.12568
}

Semantic roles & 50–950 ramp

primary

#515BB5

secondary

#C7C39B

accent

#C458D0

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0C0B13

muted

#7D7C82

Preview Lab

Preview with #515BB5

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

Preview Lab → · Contrast checker → · Palette generator →