What color is #306288?

#306288 is a dark cyan-blue. In RGB it is rgb(48, 98, 136), and in HSL hsl(206, 48%, 36%).

Is #306288 accessible as text?

On white, #306288 has a contrast ratio of 6.51:1 (passes WCAG AA for body text); on black it is 3.23:1 (fails). For text placed on #306288, use white for the best readability.

What is the closest Tailwind color to #306288?

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

What colors go well with #306288?

#306288 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #885630. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #306288 below.

Is #306288 good for buttons?

#306288 works well for buttons and highlights, but use white text on #306288 — black text only reaches 3.23:1, below the 4.5:1 needed for normal-size labels.

Is #306288 the same as CSS dimgray?

No — #306288 is not the CSS named color dimgray, but dimgray (#696969) is the closest CSS named color by perceptual color distance — it sits in a different color family, so treat it as a rough reference, not a match.

#306288 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #306288

Not just a swatch — here's how #306288 works with other colors. Named schemes with #306288 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #306288 Accent #A5C4C0 Surface #DEDBBF Secondary #9AA0A0 Anchor #20344A

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 #306288 Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 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 #306288 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #5885A9

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 #306288 Secondary #7F4438 Surface #E1DDC0 Accent #375245 Anchor #57233C

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 #306288 Secondary #788896 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 #306288 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 26/100

Cool

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

Softness 43/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 51/100

Moderate

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 52/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 57/100

Moderate

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

Brand distinctiveness 22/100

Low

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

UI accent fit 83/100

Very high

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

Surface fit 29/100

Low

Too saturated or mid-toned for big areas — keep it to accents.

Print safety 81/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #306288

For UI

For branding

For interior

For fashion

People also use #306288 with

Persian Green Dark Slate Blue Brown Gainsboro Charcoal

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 6.5:1. Use

Subtle surface Use #D3E0EA for cards and hover fills. Tint 80

Avoid beside #304488 — 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 #306288 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: #306288;
  --color-base-rgb: 48 98 136;
  --color-base-oklch: oklch(47.9% 0.082 243.7);
  --color-50: #F3F8FB;
  --color-100: #E0ECF5;
  --color-200: #C3D9EA;
  --color-300: #99BCD7;
  --color-400: #719EC1;
  --color-500: #5080A5;
  --color-600: #43657F;
  --color-700: #344A5B;
  --color-800: #25323C;
  --color-900: #181F25;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  lapis-lazuli: {
    50: '#F3F8FB',
    100: '#E0ECF5',
    200: '#C3D9EA',
    300: '#99BCD7',
    400: '#719EC1',
    500: '#5080A5',
    600: '#43657F',
    700: '#344A5B',
    800: '#25323C',
    900: '#181F25',
  },
}

$base: #306288;
$base-ink: #FFFFFF;
$base-50: #F3F8FB;
$base-100: #E0ECF5;
$base-200: #C3D9EA;
$base-300: #99BCD7;
$base-400: #719EC1;
$base-500: #5080A5;
$base-600: #43657F;
$base-700: #344A5B;
$base-800: #25323C;
$base-900: #181F25;
$base-hover: #264E6D;
$base-subtle: #BCD0E0;

{
    "color": {
        "base": {
            "value": "#306288",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F8FB",
                "type": "color"
            },
            "100": {
                "value": "#E0ECF5",
                "type": "color"
            },
            "200": {
                "value": "#C3D9EA",
                "type": "color"
            },
            "300": {
                "value": "#99BCD7",
                "type": "color"
            },
            "400": {
                "value": "#719EC1",
                "type": "color"
            },
            "500": {
                "value": "#5080A5",
                "type": "color"
            },
            "600": {
                "value": "#43657F",
                "type": "color"
            },
            "700": {
                "value": "#344A5B",
                "type": "color"
            },
            "800": {
                "value": "#25323C",
                "type": "color"
            },
            "900": {
                "value": "#181F25",
                "type": "color"
            }
        }
    }
}

Palettes built on #306288

Color Lab

Pairs with #306288

UI roles & guardrails

In real applications

Scales

Every model

Export