Colors Encyclopedia

HEX atlas value

#EFFBBB

#EFFBBB is a cool green HEX color close to Soft Yellow. According to Colors Encyclopedia, it converts to RGB 239, 251, 187, HSL 71, 89%, 86%, has luminance 0.9093, and belongs to the light and pastel groups.

greencoollightpastel
#EFFBBB Sample readable text
HEX #EFFBBB
RGB rgb(239, 251, 187)
HSL hsl(71 89% 86%)
CMYK cmyk(5, 0, 25, 2)
Luminance 0.9093
Contrast Black 19.19:1White 1.09:1

CSS

--color-effbbb: #EFFBBB;
.background-effbbb { background-color: #EFFBBB; }
.text-effbbb { color: #EFFBBB; }

Machine-readable data

Machine-Readable HEX Data (JSON)

Structured HEX color data for conversion, WCAG checks, CSS generation, automation, and AI ingestion.

AI-Ready Dataset v1.0.0
Luminance0.9093
Black text19.19:1AA Pass
White text1.09:1AA Fail
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
Download JSON Open API
Structured sections
Color systems
{"hex":"#EFFBBB","rgb":[239,251,187],"hsl":[71,89,86],"cmyk":[5,0,25,2],"luminance":0.9093,"contrast":{"black":19.19,"white":1.09}}
WCAG
{"AA":["#000000","#1A1A1A","#36454F"],"AAA":["#000000","#1A1A1A","#36454F"]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":19.19,"wcagAA":true,"wcagAAA":true},{"name":"White text","hex":"#FFFFFF","contrast":1.09,"wcagAA":false,"wcagAAA":false}]
Accessible alternatives
[{"name":"White","hex":"#FFFFFF","family":"gray","bestTextColor":"#000000","contrastBlack":21,"contrastWhite":1,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"Cream","hex":"#FFFDD0","family":"yellow","bestTextColor":"#000000","contrastBlack":20.21,"contrastWhite":1.04,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"Lemon Chiffon","hex":"#FFFACD","family":"yellow","bestTextColor":"#000000","contrastBlack":19.81,"contrastWhite":1.06,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"#F2FFB8","hex":"#F2FFB8","family":"green","bestTextColor":"#000000","contrastBlack":19.77,"contrastWhite":1.06,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"Light Goldenrod Yellow","hex":"#FAFAD2","family":"yellow","bestTextColor":"#000000","contrastBlack":19.67,"contrastWhite":1.07,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]}]
AI context
{"semanticGroups":["cool green","light","pastel","light green","pastel green","Soft Yellow adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","soft UI backgrounds","light surfaces","botanical and wellness palettes"],"contrastSafeWith":["#000000","#1A1A1A","#36454F"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/effbbb.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/soft-yellow.json","https://www.colorsencyclopedia.com/api/colors/lemon-chiffon.json","https://www.colorsencyclopedia.com/api/colors/light-goldenrod-yellow.json"]}
Harmonies
{"complementary":"#C7BCFB","analogous":["#FBE7BC","#D0FBBC"],"triadic":["#BCEFFB","#FBBCEF"],"tetradic":["#BCFBE7","#C7BCFB","#FBBCD0"],"splitComplementary":["#BCD0FB","#E7BCFB"],"monochromatic":["#FFFFFF","#EFFBBB","#DBF665"]}
Variants
{"light":"#FFFFFF","dark":"#DBF665","saturated":"#F2FFB8","desaturated":"#EAF3C3","pastel":"#FFFFFF","neon":"#F9FFE0"}
Nearest named colors
[{"slug":"soft-yellow","name":"Soft Yellow","hex":"#FFF8B8","distance":16.55294535724685},{"slug":"lemon-chiffon","name":"Lemon Chiffon","hex":"#FFFACD","distance":24.1039415863879},{"slug":"light-goldenrod-yellow","name":"Light Goldenrod Yellow","hex":"#FAFAD2","distance":25.514701644346147},{"slug":"pale-goldenrod","name":"Pale Goldenrod","hex":"#EEE8AA","distance":25.514701644346147},{"slug":"cream","name":"Cream","hex":"#FFFDD0","distance":26.476404589747453}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #EFFBBB

#EFFBBB is classified as a cool green value with light and pastel visual character. #EFFBBB is visually closest to Soft Yellow, a named yellow color with HEX #FFF8B8.

The RGB channels are 239, 251, and 187, with green carrying the strongest channel weight. In HSL, the hue is 71deg with 89% saturation and 86% lightness, so this page treats it as a high-saturation, light 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 soft UI backgrounds. Its luminance is 0.9093, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 16.55, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text19.19:1AA Pass
White text1.09:1AA Fail

AA text options: #000000, #1A1A1A, #36454F.

AAA text options: #000000, #1A1A1A, #36454F.

Accessibility-Safe Pairings and Alternatives

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

Black text#00000019.19:1 · AAA
White text#FFFFFF1.09:1 · Fail

Accessible Alternatives

White#000000 text · best 21:1#FFFFFF
Cream#000000 text · best 20.21:1#FFFDD0
Lemon Chiffon#000000 text · best 19.81:1#FFFACD
#F2FFB8#000000 text · best 19.77:1#F2FFB8
Light Goldenrod Yellow#000000 text · best 19.67:1#FAFAD2

Generated Palette

#EFFBBB#EFFBBB
#C7BCFB#C7BCFB
#FBE7BC#FBE7BC
#D0FBBC#D0FBBC
White#FFFFFF
#DBF665#DBF665

Color Harmonies

#C7BCFB#C7BCFB
#FBE7BC#FBE7BC
#D0FBBC#D0FBBC
#BCEFFB#BCEFFB
#FBBCEF#FBBCEF

Variants

White#FFFFFF
#DBF665#DBF665
#F2FFB8#F2FFB8
#EAF3C3#EAF3C3
White#FFFFFF
#F9FFE0#F9FFE0

Nearest Named Colors

Soft Yellow#FFF8B8
Lemon Chiffon#FFFACD
Light Goldenrod Yellow#FAFAD2
Pale Goldenrod#EEE8AA
Cream#FFFDD0

Related HEX Guides

Soft Yellow colorOpen the nearest named color reference for #FFF8B8.Lemon Chiffon colorOpen the nearest named color reference for #FFFACD.Light Goldenrod Yellow colorOpen the nearest named color reference for #FAFAD2.Green color familyBrowse named green colors related to this HEX value.Cool colorsExplore colors with similar temperature behavior.Light colorsFind colors in the light group.Pastel colorsFind colors in the pastel group.Color palettesBrowse palette systems related to generated color combinations.Compare colorsCompare named colors near this HEX value.Accessible colorsBrowse WCAG-friendly named colors and safe text options.#EFFBBB APIOpen the machine-readable JSON record for this HEX value.