Palettes / Colors / #4239EF

#4239EF — Vivid Blue

#4239EF is a blue color we call Vivid Blue, closest to the named color RoyalBlue (#4169E1). It belongs to the blue family.

#4239EF 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 #E6EF39; it also sits naturally between #398BEF and #9D39EF. 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 26% · Green 22% · Blue 94%

Cyan 72% · Magenta 76% · Yellow 0% · Key 6%

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

Previews

CSS code for #4239EF

.text { color: #4239EF; }
.background { background-color: #4239EF; }
.border { border: 3px solid #4239EF; }
.text-rgb { color: rgb(66, 57, 239); }
.text-hsl { color: hsl(243, 85%, 58%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #4239EF; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(66, 57, 239, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #4239EF; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(66, 57, 239, 0.8); }

HTML: <p style="color:#4239EF">Text here</p> · <div style="background-color:#4239EF">Div content here</div>

Shades of #4239EF

Tints of #4239EF

Tones of #4239EF

Color harmonies

Complementary — #E6EF39:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #4239EF: #FFFFFF.

How #4239EF 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 #4239EF 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

← #4239EE  ·  #4239F0 →

Frequently asked questions

What color is #4239EF?

#4239EF is Vivid Blue, a blue color (RGB 66, 57, 239). Its closest standard named color is RoyalBlue.

What is the RGB and HSL of #4239EF?

#4239EF is RGB 66, 57, 239 — HSL 243°, 85%, 58% — CMYK 72%, 76%, 0%, 6%.

What colors go with #4239EF?

Its complement is #E6EF39; analogous partners are #398BEF and #9D39EF. It also appears in 6+ palettes in our collection.

Can I use #4239EF for text?

White text on #4239EF has a contrast ratio of 6.86:1 (passes WCAG AA); black text gives 3.06:1.