What color is #21C8A4?

#21C8A4 is a medium, vivid teal. In RGB it is rgb(33, 200, 164), and in HSL hsl(167, 72%, 46%).

Is #21C8A4 accessible as text?

On white, #21C8A4 has a contrast ratio of 2.13:1 (fails WCAG AA for body text); on black it is 9.86:1 (passes). For text placed on #21C8A4, use black for the best readability.

What is the closest Tailwind color to #21C8A4?

The nearest Tailwind CSS token is teal-500 (#00BBA7).

What colors go well with #21C8A4?

#21C8A4 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #CA2145. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #21C8A4 below.

Is #21C8A4 good for buttons?

#21C8A4 works well for buttons and highlights, but use black text on #21C8A4 — white text only reaches 2.13:1, below the 4.5:1 needed for normal-size labels.

Is #21C8A4 the same as CSS mediumaquamarine?

No — #21C8A4 is not the CSS named color mediumaquamarine, but mediumaquamarine (#66CDAA) is the closest CSS named color.

#21C8A4 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #21C8A4

Not just a swatch — here's how #21C8A4 works with other colors. Named schemes with #21C8A4 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #21C8A4 Accent #A7C4BC Surface #E1D9BE Secondary #9AA0A0 Anchor #1B3549

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

Nordic Calm Accent · 5 colors

Accent #21C8A4 Secondary #ADB4B7 Surface #F1F2F0 Support #7994A4 Anchor #2D3236

Medium Aquamarine keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Warm Autumn Interior Dominant · 5 colors

Dominant #21C8A4 Secondary #AA6E00 Accent #647D4F Surface #F1EDDD Anchor #392B1E

This palette keeps Medium Aquamarine as the dominant warm neutral, balanced by muted terracotta and olive earth tones and grounded by a deep espresso anchor.

Botanical Studio Lead · 5 colors

Lead #21C8A4 Secondary #486C3F Accent #AA6E00 Surface #EEEAD6 Anchor #3C2F20

Medium Aquamarine 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 #21C8A4 Secondary #BAE4D6 Support #989286 Ink #16140F

Medium Aquamarine 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 Medium Aquamarine carrying the quiet middle.

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Color Lab

How #21C8A4 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 28/100

Cool

Reads cool and recessive — calming, technical, good for trust-led UI.

Softness 55/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 26/100

Low

Airy and open — recedes, leaves the composition light.

Naturalness 48/100

Moderate

Loosely natural — an earthy edge without being rustic.

Vintage feel 36/100

Low

A faint retro warmth without tipping into sepia.

Luxury 32/100

Low

Understated — leans refined without going austere.

Brand distinctiveness 53/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 45/100

Moderate

Workable accent with care around contrast.

Surface fit 34/100

Low

Usable as a tinted surface in measured doses.

Print safety 72/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #21C8A4

For UI

For branding

For interior

For fashion

People also use #21C8A4 with

Malachite Ocean Blue Cardinal Platinum Dark Slate Gray

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 8.7:1. Use

Subtle surface Use #D5F2EC for cards and hover fills. Tint 80

Avoid beside #21B6CA — 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 #21C8A4 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: #21C8A4;
  --color-base-rgb: 33 200 164;
  --color-base-oklch: oklch(74.5% 0.138 173.0);
  --color-50: #F1FDFB;
  --color-100: #DBFAF3;
  --color-200: #B9F3E7;
  --color-300: #89E6D2;
  --color-400: #5DD5BB;
  --color-500: #3BBA9E;
  --color-600: #348E7A;
  --color-700: #2A6458;
  --color-800: #1F423A;
  --color-900: #152824;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  medium-aquamarine: {
    50: '#F1FDFB',
    100: '#DBFAF3',
    200: '#B9F3E7',
    300: '#89E6D2',
    400: '#5DD5BB',
    500: '#3BBA9E',
    600: '#348E7A',
    700: '#2A6458',
    800: '#1F423A',
    900: '#152824',
  },
}

$base: #21C8A4;
$base-ink: #141310;
$base-50: #F1FDFB;
$base-100: #DBFAF3;
$base-200: #B9F3E7;
$base-300: #89E6D2;
$base-400: #5DD5BB;
$base-500: #3BBA9E;
$base-600: #348E7A;
$base-700: #2A6458;
$base-800: #1F423A;
$base-900: #152824;
$base-hover: #1AA184;
$base-subtle: #BFECE2;

{
    "color": {
        "base": {
            "value": "#21C8A4",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1FDFB",
                "type": "color"
            },
            "100": {
                "value": "#DBFAF3",
                "type": "color"
            },
            "200": {
                "value": "#B9F3E7",
                "type": "color"
            },
            "300": {
                "value": "#89E6D2",
                "type": "color"
            },
            "400": {
                "value": "#5DD5BB",
                "type": "color"
            },
            "500": {
                "value": "#3BBA9E",
                "type": "color"
            },
            "600": {
                "value": "#348E7A",
                "type": "color"
            },
            "700": {
                "value": "#2A6458",
                "type": "color"
            },
            "800": {
                "value": "#1F423A",
                "type": "color"
            },
            "900": {
                "value": "#152824",
                "type": "color"
            }
        }
    }
}

Palettes built on #21C8A4

Color Lab

Pairs with #21C8A4

UI roles & guardrails

In real applications

Scales

Every model

Export