Palettes / Colors / #424BCF

#424BCF — Blue

#424BCF 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 #424BCF 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.

#424BCF is a cool blue color associated with trust, calm and professionalism. It sits comfortably in the middle: usable for large areas in soft schemes, or as a supporting color beside something stronger.

Its strongest partner is its complement #CFC644; it also sits naturally between #4493CF and #8044CF. 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 29% · Blue 81%

Cyan 68% · Magenta 64% · Yellow 0% · Key 19%

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

Previews

CSS code for #424BCF

.text { color: #424BCF; }
.background { background-color: #424BCF; }
.border { border: 3px solid #424BCF; }
.text-rgb { color: rgb(66, 75, 207); }
.text-hsl { color: hsl(236, 59%, 54%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #424BCF; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(66, 75, 207, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #424BCF; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(66, 75, 207, 0.8); }

HTML: <p style="color:#424BCF">Text here</p> · <div style="background-color:#424BCF">Div content here</div>

Shades of #424BCF

Tints of #424BCF

Tones of #424BCF

Color harmonies

Complementary — #CFC644:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #424BCF: #FFFFFF.

Semi-transparent (opacity) text on #424BCF

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 #424BCF 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 #424BCF 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

← #424BCE  ·  #424BD0 →

Frequently asked questions

What color is #424BCF?

#424BCF is Blue, a blue color (RGB 66, 75, 207). Its closest standard named color is RoyalBlue.

What is the RGB and HSL of #424BCF?

#424BCF is RGB 66, 75, 207 — HSL 236°, 59%, 54% — CMYK 68%, 64%, 0%, 19%.

What colors go with #424BCF?

Its complement is #CFC644; analogous partners are #4493CF and #8044CF. It also appears in 6+ palettes in our collection.

Can I use #424BCF for text?

White text on #424BCF has a contrast ratio of 6.69:1 (passes WCAG AA); black text gives 3.14:1.