What color is #378690?

#378690 is a dark cyan. In RGB it is rgb(55, 134, 144), and in HSL hsl(187, 45%, 39%).

Is #378690 accessible as text?

On white, #378690 has a contrast ratio of 4.22:1 (fails WCAG AA for body text); on black it is 4.98:1 (passes). For text placed on #378690, use black for the best readability.

What is the closest Tailwind color to #378690?

The nearest Tailwind CSS token is teal-600 (#009689).

What colors go well with #378690?

#378690 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #904137. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #378690 below.

Is #378690 good for buttons?

#378690 works well for buttons and highlights, but use black text on #378690 — white text only reaches 4.22:1, below the 4.5:1 needed for normal-size labels.

Is #378690 the same as CSS darkcyan?

No — #378690 is not the CSS named color darkcyan, but darkcyan (#008B8B) is the closest CSS named color.

#378690 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #378690

Not just a swatch — here's how #378690 works with other colors. Named schemes with #378690 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #378690 Accent #A6C4BE Surface #DFDABE Secondary #9AA0A0 Anchor #1D3549

Dark Cyan 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 #378690 Secondary #AEB4B8 Surface #F1F2F0 Support #7A94A5 Anchor #2E3236

Dark Cyan 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 #378690 Surface #14161A Highlight #F4F6F8 Secondary #596671 Accent #66AAB3

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

Vintage Leather Lead · 5 colors

Lead #378690 Secondary #715117 Surface #E3DCC0 Accent #395143 Anchor #56233F

Dark Cyan 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 #378690 Secondary #90A8AC Support #979286 Ink #16140F

Dark Cyan 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 Dark Cyan carrying the quiet middle.

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Color Lab

How #378690 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 29/100

Cool

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

Softness 51/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 42/100

Moderate

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

Naturalness 6/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 56/100

Moderate

Faded, nostalgic quality — editorial, heritage and retro work.

Luxury 48/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 21/100

Low

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

UI accent fit 82/100

Very 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 79/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #378690

For UI

For branding

For interior

For fashion

People also use #378690 with

Jungle Green Lapis Lazuli Chestnut Platinum Dark Slate Gray

UI roles & guardrails

Primary action Too mid-tone for a filled button — darken for the fill. AA Large

Body text Do not use for body copy on light surfaces. Avoid

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

Background Pair with #141310 text at 4.4:1. Use

Subtle surface Use #D6E8EA for cards and hover fills. Tint 80

Avoid beside #376890 — 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 #378690 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: #378690;
  --color-base-rgb: 55 134 144;
  --color-base-oklch: oklch(57.6% 0.078 206.7);
  --color-50: #F4FAFB;
  --color-100: #E1F2F4;
  --color-200: #C4E4E8;
  --color-300: #9BCED5;
  --color-400: #74B6BE;
  --color-500: #5399A2;
  --color-600: #45767D;
  --color-700: #35555A;
  --color-800: #26393B;
  --color-900: #192325;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  dark-cyan: {
    50: '#F4FAFB',
    100: '#E1F2F4',
    200: '#C4E4E8',
    300: '#9BCED5',
    400: '#74B6BE',
    500: '#5399A2',
    600: '#45767D',
    700: '#35555A',
    800: '#26393B',
    900: '#192325',
  },
}

$base: #378690;
$base-ink: #141310;
$base-50: #F4FAFB;
$base-100: #E1F2F4;
$base-200: #C4E4E8;
$base-300: #9BCED5;
$base-400: #74B6BE;
$base-500: #5399A2;
$base-600: #45767D;
$base-700: #35555A;
$base-800: #26393B;
$base-900: #192325;
$base-hover: #2C6B73;
$base-subtle: #C0DDE0;

{
    "color": {
        "base": {
            "value": "#378690",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4FAFB",
                "type": "color"
            },
            "100": {
                "value": "#E1F2F4",
                "type": "color"
            },
            "200": {
                "value": "#C4E4E8",
                "type": "color"
            },
            "300": {
                "value": "#9BCED5",
                "type": "color"
            },
            "400": {
                "value": "#74B6BE",
                "type": "color"
            },
            "500": {
                "value": "#5399A2",
                "type": "color"
            },
            "600": {
                "value": "#45767D",
                "type": "color"
            },
            "700": {
                "value": "#35555A",
                "type": "color"
            },
            "800": {
                "value": "#26393B",
                "type": "color"
            },
            "900": {
                "value": "#192325",
                "type": "color"
            }
        }
    }
}

Palettes built on #378690

Color Lab

Pairs with #378690

UI roles & guardrails

In real applications

Scales

Every model

Export