Palettes / Colors / #EFEF57

#EFEF57 — Vivid Yellow

#EFEF57 is a yellow color we call Vivid Yellow, closest to the named color Khaki (#F0E68C). It belongs to the yellow family.

Color name

Closest CSS keyword: khaki (#F0E68C) — not an exact match. CSS khaki gives you #F0E68C, a different color; use #EFEF57 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.

#EFEF57 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 #5757EF; it also sits naturally between #EFA357 and #A3EF57. 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 94% · Green 94% · Blue 34%

Cyan 0% · Magenta 0% · Yellow 64% · Key 6%

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

Previews

CSS code for #EFEF57

.text { color: #EFEF57; }
.background { background-color: #EFEF57; }
.border { border: 3px solid #EFEF57; }
.text-rgb { color: rgb(239, 239, 87); }
.text-hsl { color: hsl(60, 83%, 64%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #EFEF57; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(239, 239, 87, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #EFEF57; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(239, 239, 87, 0.8); }

HTML: <p style="color:#EFEF57">Text here</p> · <div style="background-color:#EFEF57">Div content here</div>

Shades of #EFEF57

Tints of #EFEF57

Tones of #EFEF57

Color harmonies

Complementary — #5757EF:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #EFEF57: #000000.

Semi-transparent (opacity) text on #EFEF57

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 #EFEF57 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 #EFEF57 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

← #EFEF56  ·  #EFEF58 →

Frequently asked questions

What color is #EFEF57?

#EFEF57 is Vivid Yellow, a yellow color (RGB 239, 239, 87). Its closest standard named color is Khaki.

What is the RGB and HSL of #EFEF57?

#EFEF57 is RGB 239, 239, 87 — HSL 60°, 83%, 64% — CMYK 0%, 0%, 64%, 6%.

What colors go with #EFEF57?

Its complement is #5757EF; analogous partners are #EFA357 and #A3EF57. It also appears in 6+ palettes in our collection.

Can I use #EFEF57 for text?

Black text on #EFEF57 has a contrast ratio of 17.15:1 (passes WCAG AA); white text gives 1.22:1.