Palettes / Colors / #403DCF

#403DCF — Blue

#403DCF is a blue color we call 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 #403DCF 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.

#403DCF 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 #CDCF3F; it also sits naturally between #3F85CF and #8A3FCF. 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 81%

Cyan 69% · Magenta 71% · Yellow 0% · Key 19%

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

Previews

CSS code for #403DCF

.text { color: #403DCF; }
.background { background-color: #403DCF; }
.border { border: 3px solid #403DCF; }
.text-rgb { color: rgb(64, 61, 207); }
.text-hsl { color: hsl(241, 60%, 53%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #403DCF; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(64, 61, 207, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #403DCF; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(64, 61, 207, 0.8); }

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

Shades of #403DCF

Tints of #403DCF

Tones of #403DCF

Color harmonies

Complementary — #CDCF3F:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #403DCF: #FFFFFF.

Semi-transparent (opacity) text on #403DCF

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 #403DCF 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 #403DCF 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

← #403DCE  ·  #403DD0 →

Frequently asked questions

What color is #403DCF?

#403DCF is Blue, a blue color (RGB 64, 61, 207). Its closest standard named color is RoyalBlue.

What is the RGB and HSL of #403DCF?

#403DCF is RGB 64, 61, 207 — HSL 241°, 60%, 53% — CMYK 69%, 71%, 0%, 19%.

What colors go with #403DCF?

Its complement is #CDCF3F; analogous partners are #3F85CF and #8A3FCF. It also appears in 6+ palettes in our collection.

Can I use #403DCF for text?

White text on #403DCF has a contrast ratio of 7.54:1 (passes WCAG AA); black text gives 2.79:1.