What color is #308FCF?

#308FCF is a medium cyan-blue. In RGB it is rgb(48, 143, 207), and in HSL hsl(204, 62%, 50%).

Is #308FCF accessible as text?

On white, #308FCF has a contrast ratio of 3.53:1 (fails WCAG AA for body text); on black it is 5.96:1 (passes). For text placed on #308FCF, use black for the best readability.

What is the closest Tailwind color to #308FCF?

The nearest Tailwind CSS token is sky-600 (#0084D1).

What colors go well with #308FCF?

#308FCF pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #CF7030. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #308FCF below.

Is #308FCF good for buttons?

#308FCF works well for buttons and highlights, but use black text on #308FCF — white text only reaches 3.53:1, below the 4.5:1 needed for normal-size labels.

Is #308FCF the same as CSS steelblue?

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

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

Palettes built on #308FCF

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

Coastal Morning Lead · 5 colors

Lead #308FCF Accent #A5C4C0 Surface #DEDBBF 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.

Nordic Calm Accent · 5 colors

Accent #308FCF Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

Ocean 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 #308FCF Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #65B5F0

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.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #308FCF Secondary #9AB7CE 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.

Modern Café Dominant · 5 colors

Dominant #308FCF Anchor #3B2924 Surface #EAE5D0 Accent #7A9E77 Secondary #393933

Ocean Blue 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.

Build a working theme in the generator →

Color Lab

How #308FCF 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 12/100

Cool

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

Softness 48/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 38/100

Low

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 42/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 45/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 50/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 85/100

Very high

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

Surface fit 25/100

Low

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

Print safety 69/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #308FCF

For UI

For branding

For interior

For fashion

People also use #308FCF with

Medium Turquoise Cerulean Chocolate 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 5.3:1. Use

Subtle surface Use #DAE8F1 for cards and hover fills. Tint 80

Avoid beside #305BCF — 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 #308FCF at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

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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: #308FCF;
  --color-base-rgb: 48 143 207;
  --color-base-oklch: oklch(62.5% 0.130 242.9);
  --color-50: #F2F8FD;
  --color-100: #DDEDF8;
  --color-200: #BDDBEF;
  --color-300: #90C0E0;
  --color-400: #66A3CC;
  --color-500: #4485B1;
  --color-600: #3A6987;
  --color-700: #2E4C60;
  --color-800: #22333F;
  --color-900: #162027;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  ocean-blue: {
    50: '#F2F8FD',
    100: '#DDEDF8',
    200: '#BDDBEF',
    300: '#90C0E0',
    400: '#66A3CC',
    500: '#4485B1',
    600: '#3A6987',
    700: '#2E4C60',
    800: '#22333F',
    900: '#162027',
  },
}

$base: #308FCF;
$base-ink: #141310;
$base-50: #F2F8FD;
$base-100: #DDEDF8;
$base-200: #BDDBEF;
$base-300: #90C0E0;
$base-400: #66A3CC;
$base-500: #4485B1;
$base-600: #3A6987;
$base-700: #2E4C60;
$base-800: #22333F;
$base-900: #162027;
$base-hover: #2773A5;
$base-subtle: #C7DCEB;

{
    "color": {
        "base": {
            "value": "#308FCF",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F8FD",
                "type": "color"
            },
            "100": {
                "value": "#DDEDF8",
                "type": "color"
            },
            "200": {
                "value": "#BDDBEF",
                "type": "color"
            },
            "300": {
                "value": "#90C0E0",
                "type": "color"
            },
            "400": {
                "value": "#66A3CC",
                "type": "color"
            },
            "500": {
                "value": "#4485B1",
                "type": "color"
            },
            "600": {
                "value": "#3A6987",
                "type": "color"
            },
            "700": {
                "value": "#2E4C60",
                "type": "color"
            },
            "800": {
                "value": "#22333F",
                "type": "color"
            },
            "900": {
                "value": "#162027",
                "type": "color"
            }
        }
    }
}

Palettes built on #308FCF

Color Lab

Pairs with #308FCF

UI roles & guardrails

In real applications

Scales

Every model

Export