What color is #101EB7?

#101EB7 is a dark, vivid blue. In RGB it is rgb(16, 30, 183), and in HSL hsl(235, 84%, 39%).

Is #101EB7 accessible as text?

On white, #101EB7 has a contrast ratio of 11.10:1 (passes WCAG AA for body text); on black it is 1.89:1 (fails). For text placed on #101EB7, use white for the best readability.

What is the closest Tailwind color to #101EB7?

The nearest Tailwind CSS token is blue-800 (#193CB8).

What colors go well with #101EB7?

#101EB7 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #B7A910. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #101EB7 below.

Is #101EB7 good for buttons?

#101EB7 works well for buttons and highlights, but use white text on #101EB7 — black text only reaches 1.89:1, below the 4.5:1 needed for normal-size labels.

Is #101EB7 the same as CSS mediumblue?

No — #101EB7 is not the CSS named color mediumblue, but mediumblue (#0000CD) is the closest CSS named color.

#101EB7 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #101EB7

Not just a swatch — here's how #101EB7 works with other colors. Named schemes with #101EB7 in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #101EB7 Anchor #141210 Accent #DD965A Secondary #242933 Surface #F4ECE3

Klein Blue carries the depth in this luxury scheme, offset by a brass accent and near-black and held together by a deep neutral and an off-white surface.

Tech Product Signal · 5 colors

Signal #101EB7 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #2C52D4

Klein 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 Klein Blue.

Moody Editorial Color · 5 colors

Color #101EB7 Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #24006B

Klein Blue adds the colour to this moody editorial scheme — charcoal and a mid-grey around it, a bone highlight, and a muted jewel accent drawn from Klein Blue.

Coastal Morning Lead · 5 colors

Lead #101EB7 Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

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

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #101EB7 Secondary #536796 Support #9D8F88 Ink #18140F

Klein 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 Klein Blue carrying the quiet middle.

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Color Lab

How #101EB7 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 10/100

Cool

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

Softness 22/100

Low

Firm and assertive — carries weight and contrast.

Depth 68/100

High

Deep and grounding — anchors a layout, strong dark-mode base.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 12/100

Very low

Clean and current — no dusty, aged cast.

Luxury 59/100

Moderate

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

Brand distinctiveness 88/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 49/100

Moderate

Workable accent with care around contrast.

Surface fit 15/100

Very low

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

Print safety 59/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #101EB7

For UI

For branding

For interior

For fashion

People also use #101EB7 with

Carolina Blue Grape Citron Gainsboro Prussian Blue

UI roles & guardrails

Primary action Safe as a filled button with white label. AAA

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 11.1:1. Use

Subtle surface Use #CDD0F3 for cards and hover fills. Tint 80

Avoid beside #3A10B7 — 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 #101EB7 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: #101EB7;
  --color-base-rgb: 16 30 183;
  --color-base-oklch: oklch(37.7% 0.227 266.2);
  --color-50: #F0F1FE;
  --color-100: #D8DBFD;
  --color-200: #B4BAF8;
  --color-300: #818AEE;
  --color-400: #535FDF;
  --color-500: #303DC4;
  --color-600: #2D3595;
  --color-700: #252B69;
  --color-800: #1C2045;
  --color-900: #13152A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  klein-blue: {
    50: '#F0F1FE',
    100: '#D8DBFD',
    200: '#B4BAF8',
    300: '#818AEE',
    400: '#535FDF',
    500: '#303DC4',
    600: '#2D3595',
    700: '#252B69',
    800: '#1C2045',
    900: '#13152A',
  },
}

$base: #101EB7;
$base-ink: #FFFFFF;
$base-50: #F0F1FE;
$base-100: #D8DBFD;
$base-200: #B4BAF8;
$base-300: #818AEE;
$base-400: #535FDF;
$base-500: #303DC4;
$base-600: #2D3595;
$base-700: #252B69;
$base-800: #1C2045;
$base-900: #13152A;
$base-hover: #0D1892;
$base-subtle: #B3B8EE;

{
    "color": {
        "base": {
            "value": "#101EB7",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F1FE",
                "type": "color"
            },
            "100": {
                "value": "#D8DBFD",
                "type": "color"
            },
            "200": {
                "value": "#B4BAF8",
                "type": "color"
            },
            "300": {
                "value": "#818AEE",
                "type": "color"
            },
            "400": {
                "value": "#535FDF",
                "type": "color"
            },
            "500": {
                "value": "#303DC4",
                "type": "color"
            },
            "600": {
                "value": "#2D3595",
                "type": "color"
            },
            "700": {
                "value": "#252B69",
                "type": "color"
            },
            "800": {
                "value": "#1C2045",
                "type": "color"
            },
            "900": {
                "value": "#13152A",
                "type": "color"
            }
        }
    }
}

Palettes built on #101EB7

Color Lab

Pairs with #101EB7

UI roles & guardrails

In real applications

Scales

Every model

Export