What color is #105A4E?

#105A4E is a dark, vivid teal. In RGB it is rgb(16, 90, 78), and in HSL hsl(170, 70%, 21%).

Is #105A4E accessible as text?

On white, #105A4E has a contrast ratio of 8.09:1 (passes WCAG AA for body text); on black it is 2.59:1 (fails). For text placed on #105A4E, use white for the best readability.

What is the closest Tailwind color to #105A4E?

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

What colors go well with #105A4E?

#105A4E pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #5B101D. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #105A4E below.

Is #105A4E good for buttons?

#105A4E works well for buttons and highlights, but use white text on #105A4E — black text only reaches 2.59:1, below the 4.5:1 needed for normal-size labels.

Is #105A4E the same as CSS darkslategray?

No — #105A4E is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#105A4E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #105A4E

Not just a swatch — here's how #105A4E works with other colors. Named schemes with #105A4E in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #105A4E Accent #A7C4BC Surface #E0D9BE Secondary #9AA0A0 Anchor #1C3549

Castleton Green 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 #105A4E Secondary #AEB4B7 Surface #F1F2F0 Support #7994A4 Anchor #2E3236

Castleton Green 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 #105A4E Secondary #734F19 Surface #E4DCC0 Accent #3B5142 Anchor #5B231E

Castleton Green 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 #105A4E Anchor #382B1E Surface #ECE4D0 Accent #839C70 Secondary #3A3833

Castleton Green 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 #F7F4EF Accent #105A4E Secondary #667A75 Support #979286 Ink #16140F

Castleton 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 Castleton Green carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #105A4E 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 37/100

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 32/100

Low

Loosely natural — an earthy edge without being rustic.

Vintage feel 49/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 61/100

High

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 67/100

High

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

Surface fit 36/100

Low

Usable as a tinted surface in measured doses.

Print safety 85/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #105A4E

For UI

For branding

For interior

For fashion

People also use #105A4E with

Green Yale Blue Rosewood 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 #C2EBE4 for cards and hover fills. Tint 80

Avoid beside #104F5B — 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 #105A4E 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: #105A4E;
  --color-base-rgb: 16 90 78;
  --color-base-oklch: oklch(42.1% 0.071 178.8);
  --color-50: #F1FDFB;
  --color-100: #DBFAF5;
  --color-200: #BAF3E9;
  --color-300: #8AE5D6;
  --color-400: #5FD3C0;
  --color-500: #3DB8A3;
  --color-600: #358C7E;
  --color-700: #2B645A;
  --color-800: #20413C;
  --color-900: #152825;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  castleton-green: {
    50: '#F1FDFB',
    100: '#DBFAF5',
    200: '#BAF3E9',
    300: '#8AE5D6',
    400: '#5FD3C0',
    500: '#3DB8A3',
    600: '#358C7E',
    700: '#2B645A',
    800: '#20413C',
    900: '#152825',
  },
}

$base: #105A4E;
$base-ink: #FFFFFF;
$base-50: #F1FDFB;
$base-100: #DBFAF5;
$base-200: #BAF3E9;
$base-300: #8AE5D6;
$base-400: #5FD3C0;
$base-500: #3DB8A3;
$base-600: #358C7E;
$base-700: #2B645A;
$base-800: #20413C;
$base-900: #152825;
$base-hover: #0D493F;
$base-subtle: #A2E3D8;

{
    "color": {
        "base": {
            "value": "#105A4E",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1FDFB",
                "type": "color"
            },
            "100": {
                "value": "#DBFAF5",
                "type": "color"
            },
            "200": {
                "value": "#BAF3E9",
                "type": "color"
            },
            "300": {
                "value": "#8AE5D6",
                "type": "color"
            },
            "400": {
                "value": "#5FD3C0",
                "type": "color"
            },
            "500": {
                "value": "#3DB8A3",
                "type": "color"
            },
            "600": {
                "value": "#358C7E",
                "type": "color"
            },
            "700": {
                "value": "#2B645A",
                "type": "color"
            },
            "800": {
                "value": "#20413C",
                "type": "color"
            },
            "900": {
                "value": "#152825",
                "type": "color"
            }
        }
    }
}