What color is #5BB9FC?

#5BB9FC is a light, vivid cyan-blue. In RGB it is rgb(91, 185, 252), and in HSL hsl(205, 96%, 67%).

Is #5BB9FC accessible as text?

On white, #5BB9FC has a contrast ratio of 2.15:1 (fails WCAG AA for body text); on black it is 9.79:1 (passes). For text placed on #5BB9FC, use black for the best readability.

What is the closest Tailwind color to #5BB9FC?

The nearest Tailwind CSS token is sky-400 (#00BCFF).

What colors go well with #5BB9FC?

#5BB9FC pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #FC9D5A. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #5BB9FC below.

Is #5BB9FC good for buttons?

#5BB9FC works well for buttons and highlights, but use black text on #5BB9FC — white text only reaches 2.15:1, below the 4.5:1 needed for normal-size labels.

Is #5BB9FC the same as CSS deepskyblue?

No — #5BB9FC is not the CSS named color deepskyblue, but deepskyblue (#00BFFF) is the closest CSS named color.

#5BB9FC Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #5BB9FC

Not just a swatch — here's how #5BB9FC works with other colors. Named schemes with #5BB9FC in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #5BB9FC Accent #A5C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Deep Sky 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 #5BB9FC Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

Deep Sky 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 #5BB9FC Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #8DE0FF

Deep Sky 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 Deep Sky Blue.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #5BB9FC Secondary #C3E1F9 Support #969386 Ink #16140F

Deep Sky 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 Deep Sky Blue carrying the quiet middle.

Modern Café Dominant · 5 colors

Dominant #5BB9FC Anchor #3B2924 Surface #EAE5D0 Accent #7A9E77 Secondary #393933

Deep Sky 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 #5BB9FC 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 57/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 25/100

Low

Airy and open — recedes, leaves the composition light.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 32/100

Low

A faint retro warmth without tipping into sepia.

Luxury 31/100

Low

Understated — leans refined without going austere.

Brand distinctiveness 51/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 41/100

Moderate

Workable accent with care around contrast.

Surface fit 37/100

Low

Usable as a tinted surface in measured doses.

Print safety 69/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #5BB9FC

For UI

For branding

For interior

For fashion

People also use #5BB9FC with

Electric Blue Iris Buff Gainsboro Charcoal

UI roles & guardrails

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

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

Large display Only on dark surfaces. Avoid

Background Pair with #141310 text at 8.7:1. Use

Subtle surface Use #E3F0FA for cards and hover fills. Tint 80

Avoid beside #5A82FC — 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 #5BB9FC at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

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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: #5BB9FC;
  --color-base-rgb: 91 185 252;
  --color-base-oklch: oklch(75.6% 0.132 242.3);
  --color-50: #F0F9FE;
  --color-100: #D8EEFD;
  --color-200: #B1DCFC;
  --color-300: #7AC2F6;
  --color-400: #4AA6E8;
  --color-500: #2688CF;
  --color-600: #256B9D;
  --color-700: #214E6E;
  --color-800: #193448;
  --color-900: #12212C;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  deep-sky-blue: {
    50: '#F0F9FE',
    100: '#D8EEFD',
    200: '#B1DCFC',
    300: '#7AC2F6',
    400: '#4AA6E8',
    500: '#2688CF',
    600: '#256B9D',
    700: '#214E6E',
    800: '#193448',
    900: '#12212C',
  },
}

$base: #5BB9FC;
$base-ink: #141310;
$base-50: #F0F9FE;
$base-100: #D8EEFD;
$base-200: #B1DCFC;
$base-300: #7AC2F6;
$base-400: #4AA6E8;
$base-500: #2688CF;
$base-600: #256B9D;
$base-700: #214E6E;
$base-800: #193448;
$base-900: #12212C;
$base-hover: #179CFA;
$base-subtle: #D3E9F8;

{
    "color": {
        "base": {
            "value": "#5BB9FC",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F9FE",
                "type": "color"
            },
            "100": {
                "value": "#D8EEFD",
                "type": "color"
            },
            "200": {
                "value": "#B1DCFC",
                "type": "color"
            },
            "300": {
                "value": "#7AC2F6",
                "type": "color"
            },
            "400": {
                "value": "#4AA6E8",
                "type": "color"
            },
            "500": {
                "value": "#2688CF",
                "type": "color"
            },
            "600": {
                "value": "#256B9D",
                "type": "color"
            },
            "700": {
                "value": "#214E6E",
                "type": "color"
            },
            "800": {
                "value": "#193448",
                "type": "color"
            },
            "900": {
                "value": "#12212C",
                "type": "color"
            }
        }
    }
}

Palettes built on #5BB9FC

Color Lab

Pairs with #5BB9FC

UI roles & guardrails

In real applications

Scales

Every model

Export