Palettes / Colors / #421DBD

#421DBD — Blue

#421DBD is a blue color we call Blue, closest to the named color DarkSlateBlue (#483D8B). It belongs to the blue family.

Color name

Closest CSS keyword: darkslateblue (#483D8B) — not an exact match. CSS darkslateblue gives you #483D8B, a different color; use #421DBD 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.

#421DBD 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 #98BE1E; it also sits naturally between #1E48BE and #931EBE. 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 26% · Green 11% · Blue 74%

Cyan 65% · Magenta 85% · Yellow 0% · Key 26%

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

Previews

CSS code for #421DBD

.text { color: #421DBD; }
.background { background-color: #421DBD; }
.border { border: 3px solid #421DBD; }
.text-rgb { color: rgb(66, 29, 189); }
.text-hsl { color: hsl(254, 73%, 43%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #421DBD; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(66, 29, 189, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #421DBD; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(66, 29, 189, 0.8); }

HTML: <p style="color:#421DBD">Text here</p> · <div style="background-color:#421DBD">Div content here</div>

Shades of #421DBD

Tints of #421DBD

Tones of #421DBD

Color harmonies

Complementary — #98BE1E:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #421DBD: #FFFFFF.

Semi-transparent (opacity) text on #421DBD

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 #421DBD 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 #421DBD 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

← #421DBC  ·  #421DBE →

Frequently asked questions

What color is #421DBD?

#421DBD is Blue, a blue color (RGB 66, 29, 189). Its closest standard named color is DarkSlateBlue.

What is the RGB and HSL of #421DBD?

#421DBD is RGB 66, 29, 189 — HSL 254°, 73%, 43% — CMYK 65%, 85%, 0%, 26%.

What colors go with #421DBD?

Its complement is #98BE1E; analogous partners are #1E48BE and #931EBE. It also appears in 6+ palettes in our collection.

Can I use #421DBD for text?

White text on #421DBD has a contrast ratio of 9.80:1 (passes WCAG AA); black text gives 2.14:1.