Palettes / Colors / #ECFA28

#ECFA28 — Vivid Yellow

#ECFA28 is a yellow color we call Vivid Yellow, closest to the named color Yellow (#FFFF00). It belongs to the yellow family.

Color name

Closest CSS keyword: yellow (#FFFF00) — not an exact match. CSS yellow gives you #FFFF00, a different color; use #ECFA28 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.

#ECFA28 is a warm yellow color associated with optimism, attention and cheer. 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 #3729FA; it also sits naturally between #FA9F29 and #83FA29. 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 93% · Green 98% · Blue 16%

Cyan 6% · Magenta 0% · Yellow 84% · Key 2%

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

Previews

CSS code for #ECFA28

.text { color: #ECFA28; }
.background { background-color: #ECFA28; }
.border { border: 3px solid #ECFA28; }
.text-rgb { color: rgb(236, 250, 40); }
.text-hsl { color: hsl(64, 95%, 57%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #ECFA28; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(236, 250, 40, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #ECFA28; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(236, 250, 40, 0.8); }

HTML: <p style="color:#ECFA28">Text here</p> · <div style="background-color:#ECFA28">Div content here</div>

Shades of #ECFA28

Tints of #ECFA28

Tones of #ECFA28

Color harmonies

Complementary — #3729FA:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #ECFA28: #000000.

Semi-transparent (opacity) text on #ECFA28

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 #ECFA28 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 #ECFA28 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

← #ECFA27  ·  #ECFA29 →

Frequently asked questions

What color is #ECFA28?

#ECFA28 is Vivid Yellow, a yellow color (RGB 236, 250, 40). Its closest standard named color is Yellow.

What is the RGB and HSL of #ECFA28?

#ECFA28 is RGB 236, 250, 40 — HSL 64°, 95%, 57% — CMYK 6%, 0%, 84%, 2%.

What colors go with #ECFA28?

Its complement is #3729FA; analogous partners are #FA9F29 and #83FA29. It also appears in 6+ palettes in our collection.

Can I use #ECFA28 for text?

Black text on #ECFA28 has a contrast ratio of 18.27:1 (passes WCAG AA); white text gives 1.15:1.