What color is #21EF2E?

#21EF2E is a medium, vivid green. In RGB it is rgb(33, 239, 46), and in HSL hsl(124, 87%, 53%).

Is #21EF2E accessible as text?

On white, #21EF2E has a contrast ratio of 1.56:1 (fails WCAG AA for body text); on black it is 13.45:1 (passes). For text placed on #21EF2E, use black for the best readability.

What is the closest Tailwind color to #21EF2E?

The nearest Tailwind CSS token is lime-400 (#9AE600).

What colors go well with #21EF2E?

#21EF2E pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #EF1FE2. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #21EF2E below.

Is #21EF2E good for buttons?

#21EF2E works well for buttons and highlights, but use black text on #21EF2E — white text only reaches 1.56:1, below the 4.5:1 needed for normal-size labels.

Is #21EF2E the same as CSS lime?

No — #21EF2E is not the CSS named color lime, but lime (#00FF00) is the closest CSS named color.

#21EF2E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #21EF2E

Not just a swatch — here's how #21EF2E works with other colors. Named schemes with #21EF2E in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #21EF2E Surface #13161A Highlight #F4F6F8 Secondary #576770 Accent #79FF76

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

Japanese Sand Base · 5 colors

Base #21EF2E Surface #EEE9DC Highlight #F5F1E7 Secondary #B7B09F Ink #2B2723

Lime 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 #21EF2E Secondary #4C6B3B Accent #AD6B00 Surface #EEEAD6 Anchor #3C2F20

Lime 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 #21EF2E Secondary #D0FFCC Support #989286 Ink #17140F

Lime 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 Lime carrying the quiet middle.

Coastal Morning Lead · 5 colors

Lead #21EF2E Accent #A8C4BA Surface #E2D9BE Secondary #9AA09F Anchor #193648

Lime 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 #21EF2E 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 47/100

Neutral

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

Softness 39/100

Low

Middle-weight — neither delicate nor heavy.

Depth 19/100

Very low

Airy and open — recedes, leaves the composition light.

Naturalness 3/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 1/100

Very low

Clean and current — no dusty, aged cast.

Luxury 20/100

Very low

Playful and accessible rather than exclusive.

Brand distinctiveness 100/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 11/100

Very low

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

Surface fit 39/100

Low

Usable as a tinted surface in measured doses.

Print safety 41/100

Moderate

Shifts noticeably in CMYK — expect it to dull on press.

Pairs with #21EF2E

For UI

For branding

For interior

For fashion

People also use #21EF2E with

Green Yellow Medium Spring Green Medium 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 11.9:1. Use

Subtle surface Use #D8F6DA for cards and hover fills. Tint 80

Avoid beside #1FEF72 — 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 #21EF2E 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: #21EF2E;
  --color-base-rgb: 33 239 46;
  --color-base-oklch: oklch(82.8% 0.268 143.1);
  --color-50: #F0FEF1;
  --color-100: #D8FDDA;
  --color-200: #B3FAB8;
  --color-300: #7FF087;
  --color-400: #51E15B;
  --color-500: #2EC738;
  --color-600: #2B9732;
  --color-700: #246B29;
  --color-800: #1C451E;
  --color-900: #132A14;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  lime: {
    50: '#F0FEF1',
    100: '#D8FDDA',
    200: '#B3FAB8',
    300: '#7FF087',
    400: '#51E15B',
    500: '#2EC738',
    600: '#2B9732',
    700: '#246B29',
    800: '#1C451E',
    900: '#132A14',
  },
}

$base: #21EF2E;
$base-ink: #141310;
$base-50: #F0FEF1;
$base-100: #D8FDDA;
$base-200: #B3FAB8;
$base-300: #7FF087;
$base-400: #51E15B;
$base-500: #2EC738;
$base-600: #2B9732;
$base-700: #246B29;
$base-800: #1C451E;
$base-900: #132A14;
$base-hover: #0ECA1B;
$base-subtle: #C3F3C6;

{
    "color": {
        "base": {
            "value": "#21EF2E",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FEF1",
                "type": "color"
            },
            "100": {
                "value": "#D8FDDA",
                "type": "color"
            },
            "200": {
                "value": "#B3FAB8",
                "type": "color"
            },
            "300": {
                "value": "#7FF087",
                "type": "color"
            },
            "400": {
                "value": "#51E15B",
                "type": "color"
            },
            "500": {
                "value": "#2EC738",
                "type": "color"
            },
            "600": {
                "value": "#2B9732",
                "type": "color"
            },
            "700": {
                "value": "#246B29",
                "type": "color"
            },
            "800": {
                "value": "#1C451E",
                "type": "color"
            },
            "900": {
                "value": "#132A14",
                "type": "color"
            }
        }
    }
}

Palettes built on #21EF2E

Color Lab

Pairs with #21EF2E

UI roles & guardrails

In real applications

Scales

Every model

Export