Palettes / Colors / #4E66EF

#4E66EF — Vivid Blue

#4E66EF is a blue color we call Vivid 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 #4E66EF 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.

#4E66EF 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 #EFD64E; it also sits naturally between #4EB6EF and #864EEF. 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 31% · Green 40% · Blue 94%

Cyan 67% · Magenta 57% · Yellow 0% · Key 6%

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

Previews

CSS code for #4E66EF

.text { color: #4E66EF; }
.background { background-color: #4E66EF; }
.border { border: 3px solid #4E66EF; }
.text-rgb { color: rgb(78, 102, 239); }
.text-hsl { color: hsl(231, 83%, 62%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #4E66EF; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(78, 102, 239, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #4E66EF; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(78, 102, 239, 0.8); }

HTML: <p style="color:#4E66EF">Text here</p> · <div style="background-color:#4E66EF">Div content here</div>

Shades of #4E66EF

Tints of #4E66EF

Tones of #4E66EF

Color harmonies

Complementary — #EFD64E:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #4E66EF: #FFFFFF.

Semi-transparent (opacity) text on #4E66EF

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 #4E66EF 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 #4E66EF 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

← #4E66EE  ·  #4E66F0 →

Frequently asked questions

What color is #4E66EF?

#4E66EF is Vivid Blue, a blue color (RGB 78, 102, 239). Its closest standard named color is RoyalBlue.

What is the RGB and HSL of #4E66EF?

#4E66EF is RGB 78, 102, 239 — HSL 231°, 83%, 62% — CMYK 67%, 57%, 0%, 6%.

What colors go with #4E66EF?

Its complement is #EFD64E; analogous partners are #4EB6EF and #864EEF. It also appears in 6+ palettes in our collection.

Can I use #4E66EF for text?

White text on #4E66EF has a contrast ratio of 4.70:1 (passes WCAG AA); black text gives 4.47:1.