What color is #666138?

#666138 is a dark, muted yellow. In RGB it is rgb(102, 97, 56), and in HSL hsl(53, 29%, 31%).

Is #666138 accessible as text?

On white, #666138 has a contrast ratio of 6.30:1 (passes WCAG AA for body text); on black it is 3.33:1 (fails). For text placed on #666138, use white for the best readability.

What is the closest Tailwind color to #666138?

The nearest Tailwind CSS token is olive-600 (#5B5B4B).

What colors go well with #666138?

#666138 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #383D66. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #666138 below.

Is #666138 good for buttons?

#666138 works well for buttons and highlights, but use white text on #666138 — black text only reaches 3.33:1, below the 4.5:1 needed for normal-size labels.

Is #666138 the same as CSS darkolivegreen?

No — #666138 is not the CSS named color darkolivegreen, but darkolivegreen (#556B2F) is the closest CSS named color by perceptual color distance — it sits in a different color family, so treat it as a rough reference, not a match.

#666138 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #666138

Not just a swatch — here's how #666138 works with other colors. Named schemes with #666138 in its natural role, and a note on why the supporting colors balance it.

Warm Autumn Interior Dominant · 5 colors

Dominant #666138 Secondary #B1680C Accent #6E7A48 Surface #F3ECDD Anchor #3A2B1F

This palette keeps Dark Olive Green as the dominant warm neutral, balanced by muted terracotta and olive earth tones and grounded by a deep espresso anchor.

Modern Café Dominant · 5 colors

Dominant #666138 Anchor #392A1F Surface #EEE3D0 Accent #8D9969 Secondary #3B3833

Dark Olive Green 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.

Vintage Leather Lead · 5 colors

Lead #666138 Secondary #784C1F Surface #E7DAC0 Accent #3F513E Anchor #5B2226

Dark Olive Green plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Botanical Studio Lead · 5 colors

Lead #666138 Secondary #536A36 Accent #B1680C Surface #F0E9D6 Anchor #3D2E21

Dark Olive Green leads this botanical set among foliage greens and a terracotta accent, softened by cream and grounded in bark brown.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #666138 Secondary #8A897B Support #999186 Ink #17140F

Dark Olive Green 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 Dark Olive Green carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #666138 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 61/100

Neutral

Balanced temperature — flexible, sits between warm and cool schemes.

Softness 46/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 50/100

Moderate

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

Naturalness 62/100

High

Organic, earthy character — at home in wellness, food and craft brands.

Vintage feel 70/100

High

Faded, nostalgic quality — editorial, heritage and retro work.

Luxury 55/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 23/100

Low

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

UI accent fit 74/100

High

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

Surface fit 35/100

Low

Usable as a tinted surface in measured doses.

Print safety 90/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #666138

For UI

For branding

For interior

For fashion

People also use #666138 with

Raw Umber Dark Olive Green Charcoal Greige Army Green

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 6.3:1. Use

Subtle surface Use #E3E1D4 for cards and hover fills. Tint 80

Avoid beside #5C6638 — 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 #666138 at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

A working theme, generated in seconds.

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: #666138;
  --color-base-rgb: 102 97 56;
  --color-base-oklch: oklch(48.7% 0.060 102.3);
  --color-50: #FAF9F5;
  --color-100: #F1EFE4;
  --color-200: #E2DFCA;
  --color-300: #CAC6A5;
  --color-400: #B1AB81;
  --color-500: #948E61;
  --color-600: #736F4F;
  --color-700: #53503C;
  --color-800: #373629;
  --color-900: #23221B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-olive-green: {
    50: '#FAF9F5',
    100: '#F1EFE4',
    200: '#E2DFCA',
    300: '#CAC6A5',
    400: '#B1AB81',
    500: '#948E61',
    600: '#736F4F',
    700: '#53503C',
    800: '#373629',
    900: '#23221B',
  },
}

$base: #666138;
$base-ink: #FFFFFF;
$base-50: #FAF9F5;
$base-100: #F1EFE4;
$base-200: #E2DFCA;
$base-300: #CAC6A5;
$base-400: #B1AB81;
$base-500: #948E61;
$base-600: #736F4F;
$base-700: #53503C;
$base-800: #373629;
$base-900: #23221B;
$base-hover: #524D2D;
$base-subtle: #D6D3BF;

{
    "color": {
        "base": {
            "value": "#666138",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#FAF9F5",
                "type": "color"
            },
            "100": {
                "value": "#F1EFE4",
                "type": "color"
            },
            "200": {
                "value": "#E2DFCA",
                "type": "color"
            },
            "300": {
                "value": "#CAC6A5",
                "type": "color"
            },
            "400": {
                "value": "#B1AB81",
                "type": "color"
            },
            "500": {
                "value": "#948E61",
                "type": "color"
            },
            "600": {
                "value": "#736F4F",
                "type": "color"
            },
            "700": {
                "value": "#53503C",
                "type": "color"
            },
            "800": {
                "value": "#373629",
                "type": "color"
            },
            "900": {
                "value": "#23221B",
                "type": "color"
            }
        }
    }
}

Palettes built on #666138

Color Lab

Pairs with #666138

UI roles & guardrails

In real applications

Scales

Every model

Export