Palettes / Colors / #5166DB

#5166DB — Blue

#5166DB is a blue color we call Blue, closest to the named color RoyalBlue (#4169E1). It belongs to the blue family.

Color name

Closest CSS keyword: royalblue (#4169E1) — not an exact match. CSS royalblue gives you #4169E1, a different color; use #5166DB when you need this exact shade.

Sources: common names follow widely used color-name references; CSS keywords and their hex values follow the CSS Color specification.

#5166DB is a cool blue color associated with trust, calm and professionalism. It is saturated enough to be the accent — buttons, highlights and calls to action — while neutrals do the quiet work around it.

Its strongest partner is its complement #DBC751; it also sits naturally between #51ABDB and #8251DB. In the palettes below you can see it working alongside real color combinations from our collection.

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Color values

RGB & CMYK percentages

Red 32% · Green 40% · Blue 86%

Cyan 63% · Magenta 53% · Yellow 0% · Key 14%

CMYK values are unprofiled approximations for screen reference — not a print-proofing guarantee.

Previews

CSS code for #5166DB

.text { color: #5166DB; }
.background { background-color: #5166DB; }
.border { border: 3px solid #5166DB; }
.text-rgb { color: rgb(81, 102, 219); }
.text-hsl { color: hsl(231, 66%, 59%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #5166DB; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(81, 102, 219, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #5166DB; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(81, 102, 219, 0.8); }

HTML: <p style="color:#5166DB">Text here</p> · <div style="background-color:#5166DB">Div content here</div>

Shades of #5166DB

Tints of #5166DB

Tones of #5166DB

Color harmonies

Complementary — #DBC751:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #5166DB: #FFFFFF.

Semi-transparent (opacity) text on #5166DB

Text set with opacity blends into the background, so its real contrast is lower than the solid ratios above. Choose a text color and an opacity to see the blended color and its true ratio:

How #5166DB looks with color blindness

Simulated with standard Machado color-vision-deficiency matrices — useful when this color carries meaning in charts, maps or interfaces:

Closest design-system colors

The nearest matches in the Tailwind CSS, Material Design and Bootstrap palettes — handy when you need a framework class instead of a raw hex:

Palettes with a similar color

These palettes use a close neighbour of #5166DB rather than the exact color:

Similar colors

The closest colors that actually appear in our palette collection — click any to open its page:

Browse neighbouring colors

← #5166DA  ·  #5166DC →

Frequently asked questions

What color is #5166DB?

#5166DB is Blue, a blue color (RGB 81, 102, 219). Its closest standard named color is RoyalBlue.

What is the RGB and HSL of #5166DB?

#5166DB is RGB 81, 102, 219 — HSL 231°, 66%, 59% — CMYK 63%, 53%, 0%, 14%.

What colors go with #5166DB?

Its complement is #DBC751; analogous partners are #51ABDB and #8251DB. It also appears in 6+ palettes in our collection.

Can I use #5166DB for text?

White text on #5166DB has a contrast ratio of 4.91:1 (passes WCAG AA); black text gives 4.27:1.