What color is #308FBB?

#308FBB is a medium cyan-blue. In RGB it is rgb(48, 143, 187), and in HSL hsl(199, 59%, 46%).

Is #308FBB accessible as text?

On white, #308FBB has a contrast ratio of 3.64:1 (fails WCAG AA for body text); on black it is 5.77:1 (passes). For text placed on #308FBB, use black for the best readability.

What is the closest Tailwind color to #308FBB?

The nearest Tailwind CSS token is cyan-600 (#0092B8).

What colors go well with #308FBB?

#308FBB pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #BB5C30. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #308FBB below.

Is #308FBB good for buttons?

#308FBB works well for buttons and highlights, but use black text on #308FBB — white text only reaches 3.64:1, below the 4.5:1 needed for normal-size labels.

Is #308FBB the same as CSS steelblue?

No — #308FBB is not the CSS named color steelblue, but steelblue (#4682B4) is the closest CSS named color.

#308FBB Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #308FBB

Not just a swatch — here's how #308FBB works with other colors. Named schemes with #308FBB in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #308FBB Accent #A6C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Ocean Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Tech Product Signal · 5 colors

Signal #308FBB Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #65B4DD

Ocean 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 Ocean Blue.

Vintage Leather Lead · 5 colors

Lead #308FBB Secondary #6F5216 Surface #E2DCC0 Accent #385244 Anchor #56233D

Ocean 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.

Berry & Cream Lead · 5 colors

Lead #308FBB Surface #EEE9D6 Anchor #592247 Accent #E4C2CC Secondary #322B30

Ocean Blue sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #308FBB Secondary #98B4C4 Support #969386 Ink #16140F

Ocean 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 Ocean Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #308FBB 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 18/100

Cool

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

Softness 50/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 39/100

Low

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

Naturalness 1/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 48/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 47/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 29/100

Low

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

UI accent fit 85/100

Very high

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

Surface fit 30/100

Low

Usable as a tinted surface in measured doses.

Print safety 72/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #308FBB

For UI

For branding

For interior

For fashion

People also use #308FBB with

Medium Aquamarine Cerulean Burnt Orange Platinum Charcoal

UI roles & guardrails

Primary action Safe as a filled button with near-black label. AA

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 5.1:1. Use

Subtle surface Use #D8E8EF for cards and hover fills. Tint 80

Avoid beside #3061BB — 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 #308FBB 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: #308FBB;
  --color-base-rgb: 48 143 187;
  --color-base-oklch: oklch(61.5% 0.109 232.9);
  --color-50: #F2F9FC;
  --color-100: #DEEFF7;
  --color-200: #BEDFEE;
  --color-300: #92C6DE;
  --color-400: #68ABCA;
  --color-500: #468DAE;
  --color-600: #3C6E86;
  --color-700: #30505F;
  --color-800: #22363F;
  --color-900: #172227;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  ocean-blue: {
    50: '#F2F9FC',
    100: '#DEEFF7',
    200: '#BEDFEE',
    300: '#92C6DE',
    400: '#68ABCA',
    500: '#468DAE',
    600: '#3C6E86',
    700: '#30505F',
    800: '#22363F',
    900: '#172227',
  },
}

$base: #308FBB;
$base-ink: #141310;
$base-50: #F2F9FC;
$base-100: #DEEFF7;
$base-200: #BEDFEE;
$base-300: #92C6DE;
$base-400: #68ABCA;
$base-500: #468DAE;
$base-600: #3C6E86;
$base-700: #30505F;
$base-800: #22363F;
$base-900: #172227;
$base-hover: #267295;
$base-subtle: #C3DCE8;

{
    "color": {
        "base": {
            "value": "#308FBB",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F9FC",
                "type": "color"
            },
            "100": {
                "value": "#DEEFF7",
                "type": "color"
            },
            "200": {
                "value": "#BEDFEE",
                "type": "color"
            },
            "300": {
                "value": "#92C6DE",
                "type": "color"
            },
            "400": {
                "value": "#68ABCA",
                "type": "color"
            },
            "500": {
                "value": "#468DAE",
                "type": "color"
            },
            "600": {
                "value": "#3C6E86",
                "type": "color"
            },
            "700": {
                "value": "#30505F",
                "type": "color"
            },
            "800": {
                "value": "#22363F",
                "type": "color"
            },
            "900": {
                "value": "#172227",
                "type": "color"
            }
        }
    }
}

Palettes built on #308FBB

Color Lab

Pairs with #308FBB

UI roles & guardrails

In real applications

Scales

Every model

Export