Nearest named color: Neon Yellow
#FFFF39
#FFFF39
Nearest named
Neon Yellow
Family
Yellow
Lightness
96.9%
Chroma
0.198
Hue angle
109.6°
Temperature
Warm
Contrast on white
1.07:1 · Fail
Contrast on black
17.35:1 · AAA
Web-safe
#FFFF33
CSS oklch()
97% 0.20 110

#FFFF39 is a mid-toned, warm green. On the Color Lab it reads bold and ownable. It is too pale to lead as a primary accent and sits well as a supporting tone.

Palettes built on #FFFF39

Not just a swatch — here's how #FFFF39 works with other colors. Named schemes with #FFFF39 in its natural role, and a note on why the supporting colors balance it.

Sunset Warmth Glow · 5 colors

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

Japanese Sand Base · 5 colors

Neon Yellow sets a calm, sun-bleached base here, wrapped in bone and paper off-whites and a soft greige, with a single ink accent for wabi-sabi restraint.

Warm Autumn Interior Dominant · 5 colors

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

Minimal Editorial Surface · 5 colors

Neon Yellow 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 Yellow carrying the quiet middle.

Luxury Packaging Feature · 5 colors

Neon Yellow 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.

Build a working theme in the generator →

Color Lab

How #FFFF39 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 75/100
Warm
Reads warm and advancing — inviting, energetic, draws the eye forward.
Softness 58/100
Moderate
Middle-weight — neither delicate nor heavy.
Depth 3/100
Very low
Airy and open — recedes, leaves the composition light.
Naturalness 28/100
Low
Loosely natural — an earthy edge without being rustic.
Vintage feel 14/100
Very low
Clean and current — no dusty, aged cast.
Luxury 5/100
Very low
Playful and accessible rather than exclusive.
Brand distinctiveness 76/100
High
Bold and ownable — memorable as a primary brand color.
UI accent fit 3/100
Very low
Weak as an action color — too pale, too dark or too muted to signal.
Surface fit 52/100
Moderate
Usable as a tinted surface in measured doses.
Print safety 64/100
High
Prints close, with a slight loss of vibrancy.

Pairs with #FFFF39

For UI
For branding
For interior
For fashion
People also use #FFFF39 with

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 17.4:1. Use
Subtle surface Use #F9F9DD for cards and hover fills. Tint 80
Avoid beside #BDFF38 — 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 #FFFF39 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

Scales

ShadesBase darkened in 10% steps
TintsBase lifted toward white
TonesSaturation removed, lightness held
Monochromatic scaleDesign-system ready, 50–900

Every model

Export

:root {
  --color-base: #FFFF39;
  --color-base-rgb: 255 255 57;
  --color-base-oklch: oklch(96.9% 0.198 109.6);
  --color-50: #FEFEF0;
  --color-100: #FDFDD8;
  --color-200: #FCFCB1;
  --color-300: #F8F877;
  --color-400: #ECEC46;
  --color-500: #D2D222;
  --color-600: #9F9F23;
  --color-700: #70701F;
  --color-800: #484818;
  --color-900: #2C2C11;
  --color-on-base: #141310;
}