Palettes / Colors / #331DFB

#331DFB — Vivid Blue

#331DFB is a blue color we call Vivid Blue, closest to the named color Blue (#0000FF). It belongs to the blue family.

Color name

Closest CSS keyword: blue (#0000FF) — not an exact match. CSS blue gives you #0000FF, a different color; use #331DFB 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.

#331DFB 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 #E5FC1D; it also sits naturally between #1D76FC and #A31DFC. In the palettes below you can see it working alongside real color combinations from our collection.

Copy HEX Copy RGB Copy HSL Download PNG swatch SVG

Color values

RGB & CMYK percentages

Red 20% · Green 11% · Blue 98%

Cyan 80% · Magenta 88% · Yellow 0% · Key 2%

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

Previews

CSS code for #331DFB

.text { color: #331DFB; }
.background { background-color: #331DFB; }
.border { border: 3px solid #331DFB; }
.text-rgb { color: rgb(51, 29, 251); }
.text-hsl { color: hsl(246, 97%, 55%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #331DFB; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(51, 29, 251, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #331DFB; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(51, 29, 251, 0.8); }

HTML: <p style="color:#331DFB">Text here</p> · <div style="background-color:#331DFB">Div content here</div>

Shades of #331DFB

Tints of #331DFB

Tones of #331DFB

Color harmonies

Complementary — #E5FC1D:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #331DFB: #FFFFFF.

Semi-transparent (opacity) text on #331DFB

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 #331DFB 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 #331DFB 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

← #331DFA  ·  #331DFC →

Frequently asked questions

What color is #331DFB?

#331DFB is Vivid Blue, a blue color (RGB 51, 29, 251). Its closest standard named color is Blue.

What is the RGB and HSL of #331DFB?

#331DFB is RGB 51, 29, 251 — HSL 246°, 97%, 55% — CMYK 80%, 88%, 0%, 2%.

What colors go with #331DFB?

Its complement is #E5FC1D; analogous partners are #1D76FC and #A31DFC. It also appears in 6+ palettes in our collection.

Can I use #331DFB for text?

White text on #331DFB has a contrast ratio of 7.75:1 (passes WCAG AA); black text gives 2.71:1.