What color is #2358EF?

#2358EF is a medium, vivid blue. In RGB it is rgb(35, 88, 239), and in HSL hsl(224, 86%, 54%).

Is #2358EF accessible as text?

On white, #2358EF has a contrast ratio of 5.65:1 (passes WCAG AA for body text); on black it is 3.71:1 (fails). For text placed on #2358EF, use white for the best readability.

What is the closest Tailwind color to #2358EF?

The nearest Tailwind CSS token is blue-600 (#155DFC).

What colors go well with #2358EF?

#2358EF pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #EFB925. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #2358EF below.

Is #2358EF good for buttons?

#2358EF works well for buttons and highlights, but use white text on #2358EF — black text only reaches 3.71:1, below the 4.5:1 needed for normal-size labels.

Is #2358EF the same as CSS royalblue?

No — #2358EF is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#2358EF Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #2358EF

Not just a swatch — here's how #2358EF works with other colors. Named schemes with #2358EF in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #2358EF Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #4C84FF

Neon 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 Neon Blue.

Coastal Morning Lead · 5 colors

Lead #2358EF Accent #A5C4C2 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

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

Berry & Cream Lead · 5 colors

Lead #2358EF Surface #F6E5D8 Anchor #5B2144 Accent #E5C2CA Secondary #322B2F

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

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #2358EF Secondary #7C94C8 Support #9D8F88 Ink #18140F

Neon 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 Neon Blue carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Glow #2358EF Secondary #E76A75 Accent #F79251 Anchor #573B58 Surface #F7E7D7

Neon Blue glows at the center of this sunset palette, joined by coral and gold, deepened by a plum anchor and cooled with cream.

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Color Lab

How #2358EF 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 9/100

Cool

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

Softness 30/100

Low

Firm and assertive — carries weight and contrast.

Depth 52/100

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 14/100

Very low

Clean and current — no dusty, aged cast.

Luxury 47/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 90/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 71/100

High

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

Surface fit 10/100

Very low

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

Print safety 57/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #2358EF

For UI

For branding

For interior

For fashion

People also use #2358EF with

Bright Sky Han Purple Mustard Yellow 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 5.7:1. Use

Subtle surface Use #D9E1F6 for cards and hover fills. Tint 80

Avoid beside #3225EF — 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 #2358EF 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: #2358EF;
  --color-base-rgb: 35 88 239;
  --color-base-oklch: oklch(52.9% 0.233 264.5);
  --color-50: #F0F4FE;
  --color-100: #D8E2FD;
  --color-200: #B3C6F9;
  --color-300: #809EEF;
  --color-400: #5278E0;
  --color-500: #2F57C6;
  --color-600: #2B4896;
  --color-700: #25376A;
  --color-800: #1C2745;
  --color-900: #13192A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  neon-blue: {
    50: '#F0F4FE',
    100: '#D8E2FD',
    200: '#B3C6F9',
    300: '#809EEF',
    400: '#5278E0',
    500: '#2F57C6',
    600: '#2B4896',
    700: '#25376A',
    800: '#1C2745',
    900: '#13192A',
  },
}

$base: #2358EF;
$base-ink: #FFFFFF;
$base-50: #F0F4FE;
$base-100: #D8E2FD;
$base-200: #B3C6F9;
$base-300: #809EEF;
$base-400: #5278E0;
$base-500: #2F57C6;
$base-600: #2B4896;
$base-700: #25376A;
$base-800: #1C2745;
$base-900: #13192A;
$base-hover: #0F42CD;
$base-subtle: #C5D1F3;

{
    "color": {
        "base": {
            "value": "#2358EF",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F4FE",
                "type": "color"
            },
            "100": {
                "value": "#D8E2FD",
                "type": "color"
            },
            "200": {
                "value": "#B3C6F9",
                "type": "color"
            },
            "300": {
                "value": "#809EEF",
                "type": "color"
            },
            "400": {
                "value": "#5278E0",
                "type": "color"
            },
            "500": {
                "value": "#2F57C6",
                "type": "color"
            },
            "600": {
                "value": "#2B4896",
                "type": "color"
            },
            "700": {
                "value": "#25376A",
                "type": "color"
            },
            "800": {
                "value": "#1C2745",
                "type": "color"
            },
            "900": {
                "value": "#13192A",
                "type": "color"
            }
        }
    }
}

Palettes built on #2358EF

Color Lab

Pairs with #2358EF

UI roles & guardrails

In real applications

Scales

Every model

Export