What color is #21DA40?

#21DA40 is a medium, vivid green. In RGB it is rgb(33, 218, 64), and in HSL hsl(130, 74%, 49%).

Is #21DA40 accessible as text?

On white, #21DA40 has a contrast ratio of 1.88:1 (fails WCAG AA for body text); on black it is 11.17:1 (passes). For text placed on #21DA40, use black for the best readability.

What is the closest Tailwind color to #21DA40?

The nearest Tailwind CSS token is green-400 (#05DF72).

What colors go well with #21DA40?

#21DA40 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #D920BB. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #21DA40 below.

Is #21DA40 good for buttons?

#21DA40 works well for buttons and highlights, but use black text on #21DA40 — white text only reaches 1.88:1, below the 4.5:1 needed for normal-size labels.

Is #21DA40 the same as CSS limegreen?

No — #21DA40 is not the CSS named color limegreen, but limegreen (#32CD32) is the closest CSS named color.

#21DA40 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #21DA40

Not just a swatch — here's how #21DA40 works with other colors. Named schemes with #21DA40 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #21DA40 Surface #13161A Highlight #F4F6F8 Secondary #576770 Accent #72FF7A

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 #21DA40 Surface #EEE9DC Highlight #F5F1E7 Secondary #B6B09F 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 #21DA40 Secondary #4C6B3B Accent #AD6B00 Surface #EEEAD6 Anchor #3C2F20

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 #21DA40 Secondary #C1F2C1 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 #21DA40 Accent #A8C4BA Surface #E2D9BE Secondary #9AA09F Anchor #1A3648

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 #21DA40 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 46/100

Neutral

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

Softness 41/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 25/100

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 26/100

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 24/100

Low

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

Surface fit 34/100

Low

Usable as a tinted surface in measured doses.

Print safety 47/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #21DA40

For UI

For branding

For interior

For fashion

People also use #21DA40 with

Yellow Green Medium Aquamarine Byzantine 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 9.9:1. Use

Subtle surface Use #D7F3DC for cards and hover fills. Tint 80

Avoid beside #20D97D — 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 #21DA40 at work across the surfaces designers actually ship.

Website / UI

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Build faster.

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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: #21DA40;
  --color-base-rgb: 33 218 64;
  --color-base-oklch: oklch(77.5% 0.238 144.6);
  --color-50: #F1FEF3;
  --color-100: #DBFBE0;
  --color-200: #B8F4C2;
  --color-300: #88E798;
  --color-400: #5CD670;
  --color-500: #39BC4F;
  --color-600: #338F42;
  --color-700: #2A6533;
  --color-800: #1F4225;
  --color-900: #152918;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  malachite: {
    50: '#F1FEF3',
    100: '#DBFBE0',
    200: '#B8F4C2',
    300: '#88E798',
    400: '#5CD670',
    500: '#39BC4F',
    600: '#338F42',
    700: '#2A6533',
    800: '#1F4225',
    900: '#152918',
  },
}

$base: #21DA40;
$base-ink: #141310;
$base-50: #F1FEF3;
$base-100: #DBFBE0;
$base-200: #B8F4C2;
$base-300: #88E798;
$base-400: #5CD670;
$base-500: #39BC4F;
$base-600: #338F42;
$base-700: #2A6533;
$base-800: #1F4225;
$base-900: #152918;
$base-hover: #1AAE33;
$base-subtle: #C2EEC9;

{
    "color": {
        "base": {
            "value": "#21DA40",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1FEF3",
                "type": "color"
            },
            "100": {
                "value": "#DBFBE0",
                "type": "color"
            },
            "200": {
                "value": "#B8F4C2",
                "type": "color"
            },
            "300": {
                "value": "#88E798",
                "type": "color"
            },
            "400": {
                "value": "#5CD670",
                "type": "color"
            },
            "500": {
                "value": "#39BC4F",
                "type": "color"
            },
            "600": {
                "value": "#338F42",
                "type": "color"
            },
            "700": {
                "value": "#2A6533",
                "type": "color"
            },
            "800": {
                "value": "#1F4225",
                "type": "color"
            },
            "900": {
                "value": "#152918",
                "type": "color"
            }
        }
    }
}