Palettes / Colors / #3951DB

#3951DB — Blue

#3951DB is a blue color we call Blue, closest to the named color RoyalBlue (#4169E1). It belongs to the blue family.

#3951DB 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 #DBC239; it also sits naturally between #39A2DB and #7139DB. 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 22% · Green 32% · Blue 86%

Cyan 74% · Magenta 63% · Yellow 0% · Key 14%

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

Previews

CSS code for #3951DB

.text { color: #3951DB; }
.background { background-color: #3951DB; }
.border { border: 3px solid #3951DB; }
.text-rgb { color: rgb(57, 81, 219); }
.text-hsl { color: hsl(231, 69%, 54%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #3951DB; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(57, 81, 219, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #3951DB; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(57, 81, 219, 0.8); }

HTML: <p style="color:#3951DB">Text here</p> · <div style="background-color:#3951DB">Div content here</div>

Shades of #3951DB

Tints of #3951DB

Tones of #3951DB

Color harmonies

Complementary — #DBC239:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #3951DB: #FFFFFF.

How #3951DB 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 #3951DB 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

← #3951DA  ·  #3951DC →

Frequently asked questions

What color is #3951DB?

#3951DB is Blue, a blue color (RGB 57, 81, 219). Its closest standard named color is RoyalBlue.

What is the RGB and HSL of #3951DB?

#3951DB is RGB 57, 81, 219 — HSL 231°, 69%, 54% — CMYK 74%, 63%, 0%, 14%.

What colors go with #3951DB?

Its complement is #DBC239; analogous partners are #39A2DB and #7139DB. It also appears in 6+ palettes in our collection.

Can I use #3951DB for text?

White text on #3951DB has a contrast ratio of 6.22:1 (passes WCAG AA); black text gives 3.37:1.