Palettes / Colors / #51EC99

#51EC99 — Vivid Green

#51EC99 is a green color we call Vivid Green, closest to the named color MediumTurquoise (#48D1CC). It belongs to the green family.

Color name

Closest CSS keyword: mediumturquoise (#48D1CC) — not an exact match. CSS mediumturquoise gives you #48D1CC, a different color; use #51EC99 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.

#51EC99 is a warm-leaning green color associated with growth, calm and balance. 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 #EC51A3; it also sits naturally between #56EC51 and #51ECE6. 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 32% · Green 93% · Blue 60%

Cyan 66% · Magenta 0% · Yellow 35% · Key 7%

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

Previews

CSS code for #51EC99

.text { color: #51EC99; }
.background { background-color: #51EC99; }
.border { border: 3px solid #51EC99; }
.text-rgb { color: rgb(81, 236, 153); }
.text-hsl { color: hsl(148, 80%, 62%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #51EC99; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(81, 236, 153, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #51EC99; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(81, 236, 153, 0.8); }

HTML: <p style="color:#51EC99">Text here</p> · <div style="background-color:#51EC99">Div content here</div>

Shades of #51EC99

Tints of #51EC99

Tones of #51EC99

Color harmonies

Complementary — #EC51A3:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #51EC99: #000000.

Semi-transparent (opacity) text on #51EC99

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 #51EC99 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 #51EC99 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

← #51EC98  ·  #51EC9A →

Frequently asked questions

What color is #51EC99?

#51EC99 is Vivid Green, a green color (RGB 81, 236, 153). Its closest standard named color is MediumTurquoise.

What is the RGB and HSL of #51EC99?

#51EC99 is RGB 81, 236, 153 — HSL 148°, 80%, 62% — CMYK 66%, 0%, 35%, 7%.

What colors go with #51EC99?

Its complement is #EC51A3; analogous partners are #56EC51 and #51ECE6. It also appears in 6+ palettes in our collection.

Can I use #51EC99 for text?

Black text on #51EC99 has a contrast ratio of 13.81:1 (passes WCAG AA); white text gives 1.52:1.