What color is #10566E?

#10566E is a dark, vivid cyan. In RGB it is rgb(16, 86, 110), and in HSL hsl(195, 75%, 25%).

Is #10566E accessible as text?

On white, #10566E has a contrast ratio of 8.14:1 (passes WCAG AA for body text); on black it is 2.58:1 (fails). For text placed on #10566E, use white for the best readability.

What is the closest Tailwind color to #10566E?

The nearest Tailwind CSS token is cyan-900 (#104E64).

What colors go well with #10566E?

#10566E pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #702810. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #10566E below.

Is #10566E good for buttons?

#10566E works well for buttons and highlights, but use white text on #10566E — black text only reaches 2.58:1, below the 4.5:1 needed for normal-size labels.

Is #10566E the same as CSS darkslategray?

No — #10566E is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#10566E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #10566E

Not just a swatch — here's how #10566E works with other colors. Named schemes with #10566E in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #10566E Accent #A6C4BF Surface #DEDABF Secondary #9AA0A0 Anchor #1E344A

Classic Blue 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 #10566E Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A6 Anchor #2E3236

Classic Blue 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 #10566E Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #41788F

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

Vintage Leather Lead · 5 colors

Lead #10566E Secondary #6F5116 Surface #E2DCC0 Accent #385244 Anchor #56233D

Classic Blue 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 #10566E Secondary #667982 Support #969386 Ink #16140F

Classic Blue 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 Classic Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #10566E 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 39/100

Low

Middle-weight — neither delicate nor heavy.

Depth 56/100

Moderate

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

Naturalness 1/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 45/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 62/100

High

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

Brand distinctiveness 20/100

Low

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

UI accent fit 69/100

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 80/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #10566E

For UI

For branding

For interior

For fashion

People also use #10566E with

Sea Green Midnight Blue Wine Red Platinum Dark Slate Gray

UI roles & guardrails

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

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 8.1:1. Use

Subtle surface Use #C4E3ED for cards and hover fills. Tint 80

Avoid beside #103870 — 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 #10566E at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

A working theme, generated in seconds.

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: #10566E;
  --color-base-rgb: 16 86 110;
  --color-base-oklch: oklch(42.4% 0.076 226.8);
  --color-50: #F1FAFE;
  --color-100: #DAF3FB;
  --color-200: #B8E5F5;
  --color-300: #87D0E8;
  --color-400: #5BB8D7;
  --color-500: #389BBC;
  --color-600: #327890;
  --color-700: #295766;
  --color-800: #1E3942;
  --color-900: #142429;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  classic-blue: {
    50: '#F1FAFE',
    100: '#DAF3FB',
    200: '#B8E5F5',
    300: '#87D0E8',
    400: '#5BB8D7',
    500: '#389BBC',
    600: '#327890',
    700: '#295766',
    800: '#1E3942',
    900: '#142429',
  },
}

$base: #10566E;
$base-ink: #FFFFFF;
$base-50: #F1FAFE;
$base-100: #DAF3FB;
$base-200: #B8E5F5;
$base-300: #87D0E8;
$base-400: #5BB8D7;
$base-500: #389BBC;
$base-600: #327890;
$base-700: #295766;
$base-800: #1E3942;
$base-900: #142429;
$base-hover: #0D4659;
$base-subtle: #A5D6E6;

{
    "color": {
        "base": {
            "value": "#10566E",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1FAFE",
                "type": "color"
            },
            "100": {
                "value": "#DAF3FB",
                "type": "color"
            },
            "200": {
                "value": "#B8E5F5",
                "type": "color"
            },
            "300": {
                "value": "#87D0E8",
                "type": "color"
            },
            "400": {
                "value": "#5BB8D7",
                "type": "color"
            },
            "500": {
                "value": "#389BBC",
                "type": "color"
            },
            "600": {
                "value": "#327890",
                "type": "color"
            },
            "700": {
                "value": "#295766",
                "type": "color"
            },
            "800": {
                "value": "#1E3942",
                "type": "color"
            },
            "900": {
                "value": "#142429",
                "type": "color"
            }
        }
    }
}