#515EB9#515EB9

#515EB9 is a mid, vivid blue. Relative luminance 0.133; OKLCH L 51.8% C 0.143 H 274.2°. Best body text is #FFFFFF at 5.75:1 contrast (WCAG AA passes).

Color values

HEX	#515EB9
RGB	rgb(81, 94, 185)
HSL	hsl(233, 43%, 52%)
HSV	hsv(233, 56%, 73%)
CMYK	cmyk(56.2%, 49.2%, 0%, 27.5%)
CIE-LAB	lab(43.15, 21.99, -49.81)
CIE-LCH	lch(43.15, 54.45, 293.82°)
OKLab	oklab(51.83% 0.0105 -0.1422)
OKLCH	oklch(51.83% 0.143 274.2)
XYZ	xyz(16.1502, 13.2564, 47.5972)
Luminance	0.1326 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#515EB9 #B9AC51

analogous

#5192B9 #515EB9 #7851B9

triadic

#515EB9 #B9515E #5EB951

tetradic

#515EB9 #B95192 #B9AC51 #51B978

square

#515EB9 #B95192 #B9AC51 #51B978

split-complementary

#515EB9 #B97851 #92B951

monochromatic

#293166 #3B4692 #515EB9 #7D86CB #A8AFDC

Accessibility & contrast

On white

5.75

#515EB9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.65

#515EB9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #515EB9

5.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##515EB9	#FFFFFF	#000000	##FFFFFF
##515EB9	1.00	5.75	3.65	5.75
#FFFFFF	5.75	1.00	21.00	1.00
#000000	3.65	21.00	1.00	21.00
##FFFFFF	5.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#316ABC

Deuteranopia (green-blind)

#2262B7

Tritanopia (blue-blind)

#167283

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #515eb9;
/* rgb */ color: rgb(81, 94, 185);
/* oklch */ color: oklch(51.8% 0.143 274.2);

Tailwind

colors: {
  custom: {
    50: '#8a8bce',
    500: '#515eb9',
    950: '#000000',
  },
}

SCSS

$custom: #515eb9;
$custom-light: #8a8bce;
$custom-dark: #000000;

JSON

{
  "hex": "#515eb9",
  "rgb": {
    "r": 81,
    "g": 94,
    "b": 185
  },
  "hsl": {
    "h": 232.5,
    "s": 42.623,
    "l": 52.157
  },
  "oklch": {
    "l": 0.51827,
    "c": 0.14259,
    "h": 274.2
  },
  "luminance": 0.13258
}

Semantic roles & 50–950 ramp

primary

#515EB9

secondary

#CAC49C

accent

#C355D2

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0C0C14

muted

#7D7D82

Preview Lab

Preview with #515EB9

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

Preview Lab → · Contrast checker → · Palette generator →