What color is #18B239?

#18B239 is a medium, vivid green. In RGB it is rgb(24, 178, 57), and in HSL hsl(133, 76%, 40%).

Is #18B239 accessible as text?

On white, #18B239 has a contrast ratio of 2.81:1 (fails WCAG AA for body text); on black it is 7.47:1 (passes). For text placed on #18B239, use black for the best readability.

What is the closest Tailwind color to #18B239?

The nearest Tailwind CSS token is green-600 (#00A63E).

What colors go well with #18B239?

#18B239 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #B41892. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #18B239 below.

Is #18B239 good for buttons?

#18B239 works well for buttons and highlights, but use black text on #18B239 — white text only reaches 2.81:1, below the 4.5:1 needed for normal-size labels.

Is #18B239 the same as CSS mediumseagreen?

No — #18B239 is not the CSS named color mediumseagreen, but mediumseagreen (#3CB371) is the closest CSS named color.

#18B239 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #18B239

Not just a swatch — here's how #18B239 works with other colors. Named schemes with #18B239 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #18B239 Surface #13161A Highlight #F4F6F8 Secondary #576770 Accent #62D76C

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

Japanese Sand Base · 5 colors

Base #18B239 Surface #EEE9DC Highlight #F5F1E7 Secondary #B6B09F Ink #2B2723

Kelly Green 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 #18B239 Secondary #4C6B3C Accent #AD6C00 Surface #EEEAD6 Anchor #3C2F20

Kelly Green 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 #18B239 Secondary #A4CCA4 Support #989286 Ink #17140F

Kelly Green 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 Kelly Green carrying the quiet middle.

Coastal Morning Lead · 5 colors

Lead #18B239 Accent #A8C4BA Surface #E2D9BE Secondary #9AA09F Anchor #1A3648

Kelly Green 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 #18B239 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 45/100

Neutral

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

Softness 41/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 36/100

Low

Mid depth — usable as an accent or a muted ground.

Naturalness 35/100

Low

Loosely natural — an earthy edge without being rustic.

Vintage feel 26/100

Low

A faint retro warmth without tipping into sepia.

Luxury 37/100

Low

Understated — leans refined without going austere.

Brand distinctiveness 77/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 63/100

High

Strong interactive accent — visible and can carry a legible label.

Surface fit 23/100

Low

Too saturated or mid-toned for big areas — keep it to accents.

Print safety 56/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #18B239

For UI

For branding

For interior

For fashion

People also use #18B239 with

Malachite Jungle Green Fandango Platinum Hunter Green

UI roles & guardrails

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

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 6.6:1. Use

Subtle surface Use #D0F1D7 for cards and hover fills. Tint 80

Avoid beside #18B46E — 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 #18B239 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: #18B239;
  --color-base-rgb: 24 178 57;
  --color-base-oklch: oklch(66.6% 0.201 145.3);
  --color-50: #F1FEF4;
  --color-100: #DAFBE1;
  --color-200: #B7F5C5;
  --color-300: #87E99C;
  --color-400: #5AD875;
  --color-500: #37BD54;
  --color-600: #329046;
  --color-700: #296636;
  --color-800: #1E4326;
  --color-900: #142919;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  kelly-green: {
    50: '#F1FEF4',
    100: '#DAFBE1',
    200: '#B7F5C5',
    300: '#87E99C',
    400: '#5AD875',
    500: '#37BD54',
    600: '#329046',
    700: '#296636',
    800: '#1E4326',
    900: '#142919',
  },
}

$base: #18B239;
$base-ink: #141310;
$base-50: #F1FEF4;
$base-100: #DAFBE1;
$base-200: #B7F5C5;
$base-300: #87E99C;
$base-400: #5AD875;
$base-500: #37BD54;
$base-600: #329046;
$base-700: #296636;
$base-800: #1E4326;
$base-900: #142919;
$base-hover: #14902E;
$base-subtle: #B7ECC2;

{
    "color": {
        "base": {
            "value": "#18B239",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1FEF4",
                "type": "color"
            },
            "100": {
                "value": "#DAFBE1",
                "type": "color"
            },
            "200": {
                "value": "#B7F5C5",
                "type": "color"
            },
            "300": {
                "value": "#87E99C",
                "type": "color"
            },
            "400": {
                "value": "#5AD875",
                "type": "color"
            },
            "500": {
                "value": "#37BD54",
                "type": "color"
            },
            "600": {
                "value": "#329046",
                "type": "color"
            },
            "700": {
                "value": "#296636",
                "type": "color"
            },
            "800": {
                "value": "#1E4326",
                "type": "color"
            },
            "900": {
                "value": "#142919",
                "type": "color"
            }
        }
    }
}