What color is #166379?

#166379 is a dark cyan. In RGB it is rgb(22, 99, 121), and in HSL hsl(193, 69%, 28%).

Is #166379 accessible as text?

On white, #166379 has a contrast ratio of 6.79:1 (passes WCAG AA for body text); on black it is 3.09:1 (fails). For text placed on #166379, use white for the best readability.

What is the closest Tailwind color to #166379?

The nearest Tailwind CSS token is cyan-800 (#005F78).

What colors go well with #166379?

#166379 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #792B16. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #166379 below.

Is #166379 good for buttons?

#166379 works well for buttons and highlights, but use white text on #166379 — black text only reaches 3.09:1, below the 4.5:1 needed for normal-size labels.

Is #166379 the same as CSS darkslategray?

No — #166379 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#166379 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #166379

Not just a swatch — here's how #166379 works with other colors. Named schemes with #166379 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #166379 Accent #A6C4BF Surface #DFDABF Secondary #9AA0A0 Anchor #1E354A

Lapis Lazuli 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 #166379 Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A5 Anchor #2E3236

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

Tech Product Signal · 5 colors

Signal #166379 Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #48869A

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

Vintage Leather Lead · 5 colors

Lead #166379 Secondary #6F5116 Surface #E2DCC0 Accent #385244 Anchor #56233E

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

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #166379 Secondary #70868E Support #969386 Ink #16140F

Lapis Lazuli 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 Lapis Lazuli carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #166379 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 27/100

Cool

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

Softness 42/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 52/100

Moderate

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

Naturalness 2/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 50/100

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 21/100

Low

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

UI accent fit 80/100

High

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

Surface fit 31/100

Low

Usable as a tinted surface in measured doses.

Print safety 79/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #166379

For UI

For branding

For interior

For fashion

People also use #166379 with

Shamrock Green Yale Blue Falu Red 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 6.8:1. Use

Subtle surface Use #C8E5ED for cards and hover fills. Tint 80

Avoid beside #164279 — 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 #166379 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: #166379;
  --color-base-rgb: 22 99 121;
  --color-base-oklch: oklch(46.5% 0.079 222.1);
  --color-50: #F2FBFD;
  --color-100: #DCF3F9;
  --color-200: #BAE6F2;
  --color-300: #8BD1E4;
  --color-400: #60B9D2;
  --color-500: #3E9DB7;
  --color-600: #36798C;
  --color-700: #2C5763;
  --color-800: #203A41;
  --color-900: #152428;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  lapis-lazuli: {
    50: '#F2FBFD',
    100: '#DCF3F9',
    200: '#BAE6F2',
    300: '#8BD1E4',
    400: '#60B9D2',
    500: '#3E9DB7',
    600: '#36798C',
    700: '#2C5763',
    800: '#203A41',
    900: '#152428',
  },
}

$base: #166379;
$base-ink: #FFFFFF;
$base-50: #F2FBFD;
$base-100: #DCF3F9;
$base-200: #BAE6F2;
$base-300: #8BD1E4;
$base-400: #60B9D2;
$base-500: #3E9DB7;
$base-600: #36798C;
$base-700: #2C5763;
$base-800: #203A41;
$base-900: #152428;
$base-hover: #124F61;
$base-subtle: #ABD8E5;

{
    "color": {
        "base": {
            "value": "#166379",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2FBFD",
                "type": "color"
            },
            "100": {
                "value": "#DCF3F9",
                "type": "color"
            },
            "200": {
                "value": "#BAE6F2",
                "type": "color"
            },
            "300": {
                "value": "#8BD1E4",
                "type": "color"
            },
            "400": {
                "value": "#60B9D2",
                "type": "color"
            },
            "500": {
                "value": "#3E9DB7",
                "type": "color"
            },
            "600": {
                "value": "#36798C",
                "type": "color"
            },
            "700": {
                "value": "#2C5763",
                "type": "color"
            },
            "800": {
                "value": "#203A41",
                "type": "color"
            },
            "900": {
                "value": "#152428",
                "type": "color"
            }
        }
    }
}

Palettes built on #166379

Color Lab

Pairs with #166379

UI roles & guardrails

In real applications

Scales

Every model

Export