What color is #166366?

#166366 is a dark cyan. In RGB it is rgb(22, 99, 102), and in HSL hsl(182, 65%, 24%).

Is #166366 accessible as text?

On white, #166366 has a contrast ratio of 6.98:1 (passes WCAG AA for body text); on black it is 3.01:1 (fails). For text placed on #166366, use white for the best readability.

What is the closest Tailwind color to #166366?

The nearest Tailwind CSS token is teal-800 (#005F5A).

What colors go well with #166366?

#166366 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #651815. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #166366 below.

Is #166366 good for buttons?

#166366 works well for buttons and highlights, but use white text on #166366 — black text only reaches 3.01:1, below the 4.5:1 needed for normal-size labels.

Is #166366 the same as CSS darkslategray?

No — #166366 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#166366 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #166366

Not just a swatch — here's how #166366 works with other colors. Named schemes with #166366 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #166366 Accent #A6C4BD Surface #DFDABE Secondary #9AA0A0 Anchor #1D3549

Feldgrau 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 #166366 Secondary #AEB4B8 Surface #F1F2F0 Support #7A94A5 Anchor #2E3236

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

Vintage Leather Lead · 5 colors

Lead #166366 Secondary #715017 Surface #E3DCC0 Accent #3A5143 Anchor #552340

Feldgrau plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Modern Café Dominant · 5 colors

Dominant #166366 Anchor #382C1D Surface #EBE4D0 Accent #809D72 Secondary #3A3933

Feldgrau anchors this café scheme as the warm mid-tone, lifted by latte cream and a muted sage accent and grounded by espresso brown and a warm charcoal.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #166366 Secondary #6F8485 Support #979286 Ink #16140F

Feldgrau 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 Feldgrau carrying the quiet middle.

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Color Lab

How #166366 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 32/100

Cool

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

Softness 42/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 53/100

Moderate

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

Naturalness 10/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 49/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 58/100

Moderate

Restrained and premium — deep, quiet, high-end packaging and fashion.

Brand distinctiveness 19/100

Very low

Quiet and neutral — a supporting tone, not a signature.

UI accent fit 75/100

High

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

Surface fit 34/100

Low

Usable as a tinted surface in measured doses.

Print safety 82/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #166366

For UI

For branding

For interior

For fashion

People also use #166366 with

Sea Green Yale Blue Rosewood Platinum Dark Slate Gray

UI roles & guardrails

Primary action Safe as a filled button with white label. AA

Body text Passes on white at 16px and above. Pass

Large display Fine for headings 24px+ on white. Pass

Background Pair with white text at 7.0:1. Use

Subtle surface Use #C6E9EA for cards and hover fills. Tint 80

Avoid beside #154865 — 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 #166366 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: #166366;
  --color-base-rgb: 22 99 102;
  --color-base-oklch: oklch(45.7% 0.071 198.9);
  --color-50: #F2FCFD;
  --color-100: #DDF8F9;
  --color-200: #BCEFF1;
  --color-300: #8EDFE2;
  --color-400: #63CBCF;
  --color-500: #41B0B4;
  --color-600: #388789;
  --color-700: #2D6062;
  --color-800: #213F40;
  --color-900: #162727;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  feldgrau: {
    50: '#F2FCFD',
    100: '#DDF8F9',
    200: '#BCEFF1',
    300: '#8EDFE2',
    400: '#63CBCF',
    500: '#41B0B4',
    600: '#388789',
    700: '#2D6062',
    800: '#213F40',
    900: '#162727',
  },
}

$base: #166366;
$base-ink: #FFFFFF;
$base-50: #F2FCFD;
$base-100: #DDF8F9;
$base-200: #BCEFF1;
$base-300: #8EDFE2;
$base-400: #63CBCF;
$base-500: #41B0B4;
$base-600: #388789;
$base-700: #2D6062;
$base-800: #213F40;
$base-900: #162727;
$base-hover: #114F51;
$base-subtle: #A8E0E2;

{
    "color": {
        "base": {
            "value": "#166366",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2FCFD",
                "type": "color"
            },
            "100": {
                "value": "#DDF8F9",
                "type": "color"
            },
            "200": {
                "value": "#BCEFF1",
                "type": "color"
            },
            "300": {
                "value": "#8EDFE2",
                "type": "color"
            },
            "400": {
                "value": "#63CBCF",
                "type": "color"
            },
            "500": {
                "value": "#41B0B4",
                "type": "color"
            },
            "600": {
                "value": "#388789",
                "type": "color"
            },
            "700": {
                "value": "#2D6062",
                "type": "color"
            },
            "800": {
                "value": "#213F40",
                "type": "color"
            },
            "900": {
                "value": "#162727",
                "type": "color"
            }
        }
    }
}

Palettes built on #166366

Color Lab

Pairs with #166366

UI roles & guardrails

In real applications

Scales

Every model

Export