HEX atlas value

#300303

#300303 is a warm red HEX color close to Oxblood. According to Colors Encyclopedia, it converts to RGB 48, 3, 3, HSL 0, 88%, 10%, has luminance 0.007, and belongs to the dark group.

red warm dark

#300303 Sample readable text

HEX #300303

RGB rgb(48, 3, 3)

HSL hsl(0 88% 10%)

CMYK cmyk(0, 94, 94, 81)

Luminance 0.007

Contrast Black 1.14:1White 18.42:1

CSS

--color-300303: #300303;
.background-300303 { background-color: #300303; }
.text-300303 { color: #300303; }

Luminance0.007

Black text1.14:1AA Fail

White text18.42:1AA Pass

hexCanonical HEX value

rgbRed, green, blue channels

hslHue, saturation, lightness

cmykApproximate print conversion

wcagAA and AAA contrast options

harmoniesMathematical harmony sets

variantsGenerated tone variants

nearestColorsKnowledge graph neighbors

Structured sections

Color systems

{"hex":"#300303","rgb":[48,3,3],"hsl":[0,88,10],"cmyk":[0,94,94,81],"luminance":0.007,"contrast":{"black":1.14,"white":18.42}}

WCAG

{"AA":["#FFFFFF","#F5F5F5"],"AAA":["#FFFFFF","#F5F5F5"]}

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":1.14,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":18.42,"wcagAA":true,"wcagAAA":true}]

Accessible alternatives

[{"name":"Black","hex":"#000000","family":"gray","bestTextColor":"#FFFFFF","contrastBlack":1,"contrastWhite":21,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Carbon Black","hex":"#0C0C0C","family":"gray","bestTextColor":"#FFFFFF","contrastBlack":1.07,"contrastWhite":19.55,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#330000","hex":"#330000","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.14,"contrastWhite":18.42,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#2A0909","hex":"#2A0909","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.14,"contrastWhite":18.39,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#30031A","hex":"#30031A","family":"pink","bestTextColor":"#FFFFFF","contrastBlack":1.15,"contrastWhite":18.2,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]}]

AI context

{"semanticGroups":["warm red","dark","dark red","Oxblood adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","dark theme accents","high-attention visual states"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/300303.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/oxblood.json","https://www.colorsencyclopedia.com/api/colors/carbon-black.json","https://www.colorsencyclopedia.com/api/colors/matte-black.json"]}

Harmonies

{"complementary":"#033030","analogous":["#30031A","#301A03"],"triadic":["#033003","#030330"],"tetradic":["#1A3003","#033030","#190330"],"splitComplementary":["#03301A","#031930"],"monochromatic":["#860909","#300303","#000000"]}

Variants

{"light":"#860909","dark":"#000000","saturated":"#330000","desaturated":"#2A0909","pastel":"#9A1818","neon":"#5C0000"}

Nearest named colors

[{"slug":"oxblood","name":"Oxblood","hex":"#4A0000","distance":26.343879744638983},{"slug":"carbon-black","name":"Carbon Black","hex":"#0C0C0C","distance":38.18376618407357},{"slug":"matte-black","name":"Matte Black","hex":"#1A1A1A","distance":39.26830783214372},{"slug":"carbon-fiber","name":"Carbon Fiber","hex":"#1C1C1C","distance":40.620192023179804},{"slug":"raisin","name":"Raisin","hex":"#242124","distance":46.184412955021955}]

HEX meaning and use

About #300303

#300303 is classified as a warm red value with dark visual character. #300303 is visually closest to Oxblood, a named red color with HEX #4A0000.

The RGB channels are 48, 3, and 3, with red carrying the strongest channel weight. In HSL, the hue is 0deg with 88% saturation and 10% lightness, so this page treats it as a high-saturation, dark atlas color rather than a generic swatch.

According to Colors Encyclopedia, this HEX value works best for color conversion, WCAG contrast checks, CSS color tokens, and dark theme accents. Its luminance is 0.007, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 26.34, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text1.14:1AA Fail

White text18.42:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: #FFFFFF, #F5F5F5.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #300303 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000001.14:1 · Fail

White text#FFFFFF18.42:1 · AAA

Accessible Alternatives

Black#FFFFFF text · best 21:1#000000

Carbon Black#FFFFFF text · best 19.55:1#0C0C0C

#330000#FFFFFF text · best 18.42:1#330000

#2A0909#FFFFFF text · best 18.39:1#2A0909

#30031A#FFFFFF text · best 18.2:1#30031A

Generated Palette

#300303#300303

#033030#033030

#30031A#30031A

#301A03#301A03

#860909#860909

Black#000000

Color Harmonies

#033030#033030

#30031A#30031A

#301A03#301A03

#033003#033003

#030330#030330

Variants

#860909#860909

Black#000000

#330000#330000

#2A0909#2A0909

#9A1818#9A1818

#5C0000#5C0000

Nearest Named Colors

Oxblood#4A0000

Carbon Black#0C0C0C

Matte Black#1A1A1A

Carbon Fiber#1C1C1C

Raisin#242124

#300303

CSS

Machine-Readable HEX Data (JSON)

About #300303

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides