Palettes / Colors / #403DF3

#403DF3 — Vivid Blue

#403DF3 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 #403DF3 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.

#403DF3 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 #F0F33F; it also sits naturally between #3F96F3 and #9C3FF3. 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 25% · Green 24% · Blue 95%

Cyan 74% · Magenta 75% · Yellow 0% · Key 5%

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

Previews

CSS code for #403DF3

.text { color: #403DF3; }
.background { background-color: #403DF3; }
.border { border: 3px solid #403DF3; }
.text-rgb { color: rgb(64, 61, 243); }
.text-hsl { color: hsl(241, 88%, 60%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #403DF3; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(64, 61, 243, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #403DF3; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(64, 61, 243, 0.8); }

HTML: <p style="color:#403DF3">Text here</p> · <div style="background-color:#403DF3">Div content here</div>

Shades of #403DF3

Tints of #403DF3

Tones of #403DF3

Color harmonies

Complementary — #F0F33F:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #403DF3: #FFFFFF.

Semi-transparent (opacity) text on #403DF3

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 #403DF3 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 #403DF3 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

← #403DF2  ·  #403DF4 →

Frequently asked questions

What color is #403DF3?

#403DF3 is Vivid Blue, a blue color (RGB 64, 61, 243). Its closest standard named color is RoyalBlue.

What is the RGB and HSL of #403DF3?

#403DF3 is RGB 64, 61, 243 — HSL 241°, 88%, 60% — CMYK 74%, 75%, 0%, 5%.

What colors go with #403DF3?

Its complement is #F0F33F; analogous partners are #3F96F3 and #9C3FF3. It also appears in 6+ palettes in our collection.

Can I use #403DF3 for text?

White text on #403DF3 has a contrast ratio of 6.60:1 (passes WCAG AA); black text gives 3.18:1.