What color is #3FD421?

#3FD421 is a medium, vivid green. In RGB it is rgb(63, 212, 33), and in HSL hsl(110, 73%, 48%).

Is #3FD421 accessible as text?

On white, #3FD421 has a contrast ratio of 1.97:1 (fails WCAG AA for body text); on black it is 10.65:1 (passes). For text placed on #3FD421, use black for the best readability.

What is the closest Tailwind color to #3FD421?

The nearest Tailwind CSS token is lime-500 (#7CCF00).

What colors go well with #3FD421?

#3FD421 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #B621D4. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #3FD421 below.

Is #3FD421 good for buttons?

#3FD421 works well for buttons and highlights, but use black text on #3FD421 — white text only reaches 1.97:1, below the 4.5:1 needed for normal-size labels.

Is #3FD421 the same as CSS limegreen?

No — #3FD421 is not the CSS named color limegreen, but limegreen (#32CD32) is the closest CSS named color.

#3FD421 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3FD421

Not just a swatch — here's how #3FD421 works with other colors. Named schemes with #3FD421 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #3FD421 Surface #13161A Highlight #F4F6F8 Secondary #576770 Accent #7DFA69

Malachite is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Malachite.

Japanese Sand Base · 5 colors

Base #3FD421 Surface #EEE9DC Highlight #F5F1E7 Secondary #B7B09F Ink #2B2723

Malachite sets a calm, sun-bleached base here, wrapped in bone and paper off-whites and a soft greige, with a single ink accent for wabi-sabi restraint.

Botanical Studio Lead · 5 colors

Lead #3FD421 Secondary #4D6B3B Accent #AE6B00 Surface #EFEAD6 Anchor #3C2F21

Malachite leads this botanical set among foliage greens and a terracotta accent, softened by cream and grounded in bark brown.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #3FD421 Secondary #C1EDB9 Support #989286 Ink #17140F

Malachite is the single accent in this high-contrast editorial system — set on near-white paper against near-black ink, with a warm grey and a desaturated tint of Malachite carrying the quiet middle.

Coastal Morning Lead · 5 colors

Lead #3FD421 Accent #A8C4BA Surface #E2D9BE Secondary #9AA09F Anchor #193648

Malachite opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Build a working theme in the generator →

Color Lab

How #3FD421 actually behaves in design work — read from its OKLCH lightness, chroma and hue, not just its raw numbers. Ten signals to help you decide where this color earns its place.

Warmth 49/100

Neutral

Balanced temperature — flexible, sits between warm and cool schemes.

Softness 40/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 26/100

Low

Airy and open — recedes, leaves the composition light.

Naturalness 11/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 10/100

Very low

Clean and current — no dusty, aged cast.

Luxury 27/100

Low

Understated — leans refined without going austere.

Brand distinctiveness 92/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 26/100

Low

Weak as an action color — too pale, too dark or too muted to signal.

Surface fit 32/100

Low

Usable as a tinted surface in measured doses.

Print safety 47/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #3FD421

For UI

For branding

For interior

For fashion

People also use #3FD421 with

Pear Shamrock Dark Orchid Platinum Hunter Green

UI roles & guardrails

Primary action Safe as a filled button with near-black label. AAA

Body text Do not use for body copy on light surfaces. Avoid

Large display Only on dark surfaces. Avoid

Background Pair with #141310 text at 9.4:1. Use

Subtle surface Use #DBF2D7 for cards and hover fills. Tint 80

Avoid beside #21D43F — the hue gap is too small to read as intentional. Clash

In real applications

Not a swatch to memorise — a color to build with. Here is #3FD421 at work across the surfaces designers actually ship.

Website / UI

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Dashboard

Revenue

$48.2k ▲ 12%

Brand

AVELINE

Studio

Poster

Nov 14 · 8PM

NIGHT
MARKET

Packaging

BLOOM

Botanical Wash

250 ml

Interior

Every model

Export

:root {
  --color-base: #3FD421;
  --color-base-rgb: 63 212 33;
  --color-base-oklch: oklch(76.2% 0.240 141.1);
  --color-50: #F3FDF1;
  --color-100: #E0FADB;
  --color-200: #C2F4B9;
  --color-300: #98E788;
  --color-400: #71D55D;
  --color-500: #50BB3A;
  --color-600: #438E33;
  --color-700: #34652A;
  --color-800: #25421F;
  --color-900: #182815;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  malachite: {
    50: '#F3FDF1',
    100: '#E0FADB',
    200: '#C2F4B9',
    300: '#98E788',
    400: '#71D55D',
    500: '#50BB3A',
    600: '#438E33',
    700: '#34652A',
    800: '#25421F',
    900: '#182815',
  },
}

$base: #3FD421;
$base-ink: #141310;
$base-50: #F3FDF1;
$base-100: #E0FADB;
$base-200: #C2F4B9;
$base-300: #98E788;
$base-400: #71D55D;
$base-500: #50BB3A;
$base-600: #438E33;
$base-700: #34652A;
$base-800: #25421F;
$base-900: #182815;
$base-hover: #32A91A;
$base-subtle: #C9EDC1;

{
    "color": {
        "base": {
            "value": "#3FD421",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3FDF1",
                "type": "color"
            },
            "100": {
                "value": "#E0FADB",
                "type": "color"
            },
            "200": {
                "value": "#C2F4B9",
                "type": "color"
            },
            "300": {
                "value": "#98E788",
                "type": "color"
            },
            "400": {
                "value": "#71D55D",
                "type": "color"
            },
            "500": {
                "value": "#50BB3A",
                "type": "color"
            },
            "600": {
                "value": "#438E33",
                "type": "color"
            },
            "700": {
                "value": "#34652A",
                "type": "color"
            },
            "800": {
                "value": "#25421F",
                "type": "color"
            },
            "900": {
                "value": "#182815",
                "type": "color"
            }
        }
    }
}