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#F03300 · #FFE400 · #FFFF00 · #669900

A 4-color palette palette · Complete color analysis and application guide

Scene Recommendations Scene Recommendations

Emotion EMOTION

PassionateDynamicWarm

Industry INDUSTRY

EntertainmentFMCG

UI Context UI CONTEXT

Sale PromoSocial App

Color Details Color Details

#F03300

Vermilion · OrangeRed · Passion Red

HEX
#F03300
RGB
rgb(240, 51, 0)
HSL
hsl(13, 100%, 47%)
HSB
hsb(13, 100%, 94%)
CMYK
cmyk(0%, 79%, 100%, 6%)
Oklch
oklch(62.0% 0.228 33.1)

Traditional「Vermilion」· Paint「Passion Red」· Creative Blush Sunrise

#FFE400

Autumn Sage · Gold · Honey Gold

HEX
#FFE400
RGB
rgb(255, 228, 0)
HSL
hsl(54, 100%, 50%)
HSB
hsb(54, 100%, 100%)
CMYK
cmyk(0%, 11%, 100%, 0%)
Oklch
oklch(91.3% 0.190 100.6)

Traditional「Autumn Sage」· Paint「Honey Gold」· Creative Blush Sunrise

#FFFF00

Autumn Sage · Yellow · Honey Gold

HEX
#FFFF00
RGB
rgb(255, 255, 0)
HSL
hsl(60, 100%, 50%)
HSB
hsb(60, 100%, 100%)
CMYK
cmyk(0%, 0%, 100%, 0%)
Oklch
oklch(96.8% 0.211 109.8)

Traditional「Autumn Sage」· Paint「Honey Gold」· Creative Blush Sunrise

#669900

Grass Green · Olive · Forest Green

HEX
#669900
RGB
rgb(102, 153, 0)
HSL
hsl(80, 100%, 30%)
HSB
hsb(80, 100%, 60%)
CMYK
cmyk(33%, 0%, 100%, 40%)
Oklch
oklch(62.3% 0.166 129.4)

Traditional「Grass Green」· Paint「Forest Green」· Creative Blush Sunrise

Color Harmonies Color Harmonies

Based on color wheel theory, calculated from primary color

Complementary

F03300
00BCF0

Analogous

F00044
F03300
F0AC00

Triadic

F03300
00F034
3400F0

Split-Comp.

F03300
00F0AC
0044F0

Tetradic

F03300
44F000
00BCF0
AC00F0

Contrast Matrix WCAG 2.1 Contrast

F03300
FFE400
FFFF00
669900
—
3.2
AA Large
3.8
AA Large
1.2
Fail
3.2
AA Large
—
1.2
Fail
2.7
Fail
3.8
AA Large
1.2
Fail
—
3.2
AA Large
1.2
Fail
2.7
Fail
3.2
AA Large
—
White BG
4.1AA Large
1.3Fail
1.1Fail
3.4AA Large
Black BG
5.2AA
16.3AAA
19.6AAA
6.1AA

Color Blindness Simulation Color Blindness Simulation

Protanopia

9E9C0C
F3F337
FFFF3E
7C7D25

Deuteranopia

A9B70F
F5F744
FFFF4D
79752E

Tritanopia

E71618
FE636C
FF6E79
694249

Achromatopsia

666666
D2D2D2
E2E2E2
787878

Shades & Tints Shades & Tints

#F03300

Dark
Light

#FFE400

Dark
Light

#FFFF00

Dark
Light

Code Snippets Code Snippets

CSS Custom Properties

:root {
  --color-1: #f03300;
  --color-2: #ffe400;
  --color-3: #ffff00;
  --color-4: #669900;
}

SCSS

$color-1: #f03300;
$color-2: #ffe400;
$color-3: #ffff00;
$color-4: #669900;

TAILWIND

colors: {
  'brand-1': '#f03300',
  'brand-2': '#ffe400',
  'brand-3': '#ffff00',
  'brand-4': '#669900',
}

RGB Array

[240, 51, 0], [255, 228, 0], [255, 255, 0], [102, 153, 0]

FAQ FAQ

What scenarios is this 4-color palette suitable for?

This general-style palette of #F03300, #FFE400, #FFFF00, #669900 is ideal for: social media posters, mobile apps, e-commerce promos. Vivid colors effectively attract user attention. It is a vibrant and energetic choice among 4-color palettes.

How to use this palette in CSS or frontend projects?

Copy the CSS variables directly: --color-1: #f03300; --color-2: #ffe400; --color-3: #ffff00; --color-4: #669900. LangColor editor supports one-click export to CSS, SCSS, Tailwind, JSON and more. Click the "Export" button to choose your format.

What UI/UX design tips apply to this palette?

Medium-brightness colors suit brand primary and accent colors. Use the darkest for text, lightest for backgrounds, and mid-tones for emphasis. Use the "Contrast Matrix" tool in LangColor editor to check WCAG accessibility levels for every color pair.

Which industries or brands suit this palette?

This general-style 4-color scheme is especially suited for food & dining, entertainment, kids education, social industries. Bold colors convey vitality and innovation. Click "AI Analysis" in the editor for more detailed brand color suggestions.

🎨 Open this palette in Editor →

Generated by LangColor online color tool · Breaking the barrier between language and color