Palettes / Colors / #3700FF

#3700FF — Vivid Blue

#3700FF is a blue color we call Vivid Blue, closest to the named color Blue (#0000FF). It belongs to the blue family.

#3700FF 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 #C8FF00; it also sits naturally between #0048FF and #B700FF. 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 0% · Blue 100%

Cyan 78% · Magenta 100% · Yellow 0% · Key 0%

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

Previews

CSS code for #3700FF

.text { color: #3700FF; }
.background { background-color: #3700FF; }
.border { border: 3px solid #3700FF; }
.text-rgb { color: rgb(55, 0, 255); }
.text-hsl { color: hsl(253, 100%, 50%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #3700FF; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(55, 0, 255, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #3700FF; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(55, 0, 255, 0.8); }

HTML: <p style="color:#3700FF">Text here</p> · <div style="background-color:#3700FF">Div content here</div>

Shades of #3700FF

Tints of #3700FF

Tones of #3700FF

Color harmonies

Complementary — #C8FF00:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #3700FF: #FFFFFF.

How #3700FF 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 #3700FF 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

← #3700FE  ·  #370100 →

Frequently asked questions

What color is #3700FF?

#3700FF is Vivid Blue, a blue color (RGB 55, 0, 255). Its closest standard named color is Blue.

What is the RGB and HSL of #3700FF?

#3700FF is RGB 55, 0, 255 — HSL 253°, 100%, 50% — CMYK 78%, 100%, 0%, 0%.

What colors go with #3700FF?

Its complement is #C8FF00; analogous partners are #0048FF and #B700FF. It also appears in 6+ palettes in our collection.

Can I use #3700FF for text?

White text on #3700FF has a contrast ratio of 8.06:1 (passes WCAG AA); black text gives 2.61:1.