Palettes / Colors / #577BE8

#577BE8 — Blue

#577BE8 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 #577BE8 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.

#577BE8 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 #E8C559; it also sits naturally between #59C5E8 and #7D59E8. 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 34% · Green 48% · Blue 91%

Cyan 63% · Magenta 47% · Yellow 0% · Key 9%

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

Previews

CSS code for #577BE8

.text { color: #577BE8; }
.background { background-color: #577BE8; }
.border { border: 3px solid #577BE8; }
.text-rgb { color: rgb(87, 123, 232); }
.text-hsl { color: hsl(225, 76%, 63%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #577BE8; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(87, 123, 232, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #577BE8; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(87, 123, 232, 0.8); }

HTML: <p style="color:#577BE8">Text here</p> · <div style="background-color:#577BE8">Div content here</div>

Shades of #577BE8

Tints of #577BE8

Tones of #577BE8

Color harmonies

Complementary — #E8C559:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #577BE8: #000000.

Semi-transparent (opacity) text on #577BE8

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 #577BE8 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 #577BE8 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

← #577BE7  ·  #577BE9 →

Frequently asked questions

What color is #577BE8?

#577BE8 is Blue, a blue color (RGB 87, 123, 232). Its closest standard named color is RoyalBlue.

What is the RGB and HSL of #577BE8?

#577BE8 is RGB 87, 123, 232 — HSL 225°, 76%, 63% — CMYK 63%, 47%, 0%, 9%.

What colors go with #577BE8?

Its complement is #E8C559; analogous partners are #59C5E8 and #7D59E8. It also appears in 6+ palettes in our collection.

Can I use #577BE8 for text?

Black text on #577BE8 has a contrast ratio of 5.40:1 (passes WCAG AA); white text gives 3.89:1.