HEX atlas value

#10B21D

#10B21D is a cool green HEX color close to Forest Green. According to Colors Encyclopedia, it converts to RGB 16, 178, 29, HSL 125, 84%, 38%, has luminance 0.3204, and belongs to the vibrant and jewel tone groups.

green cool vibrant jewel-tone

#10B21D Sample readable text

HEX #10B21D

RGB rgb(16, 178, 29)

HSL hsl(125 84% 38%)

CMYK cmyk(91, 0, 84, 30)

Luminance 0.3204

Contrast Black 7.41:1White 2.83:1

CSS

--color-10b21d: #10B21D;
.background-10b21d { background-color: #10B21D; }
.text-10b21d { color: #10B21D; }

Luminance0.3204

Black text7.41:1AA Pass

White text2.83:1AA 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

Structured sections

Color systems

{"hex":"#10B21D","rgb":[16,178,29],"hsl":[125,84,38],"cmyk":[91,0,84,30],"luminance":0.3204,"contrast":{"black":7.41,"white":2.83}}

WCAG

{"AA":["#000000","#1A1A1A"],"AAA":["#000000"]}

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":7.41,"wcagAA":true,"wcagAAA":true},{"name":"White text","hex":"#FFFFFF","contrast":2.83,"wcagAA":false,"wcagAAA":false}]

Accessible alternatives

[{"name":"#31ED40","hex":"#31ED40","family":"green","bestTextColor":"#000000","contrastBlack":13.32,"contrastWhite":1.58,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"Lime Green","hex":"#32CD32","family":"green","bestTextColor":"#000000","contrastBlack":9.91,"contrastWhite":2.12,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#00C210","hex":"#00C210","family":"green","bestTextColor":"#000000","contrastBlack":8.72,"contrastWhite":2.41,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"Kelly Green","hex":"#4CBB17","family":"green","bestTextColor":"#000000","contrastBlack":8.43,"contrastWhite":2.49,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000"]},{"name":"#085E0F","hex":"#085E0F","family":"green","bestTextColor":"#FFFFFF","contrastBlack":2.62,"contrastWhite":8.02,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]}]

AI context

{"semanticGroups":["cool green","vibrant","jewel tone","vibrant green","jewel tone green","Forest Green adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","rich accent palettes","high-energy accents","botanical and wellness palettes"],"contrastSafeWith":["#000000","#1A1A1A"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/10b21d.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/forest-green.json","https://www.colorsencyclopedia.com/api/colors/lime-green.json","https://www.colorsencyclopedia.com/api/colors/green.json"]}

Harmonies

{"complementary":"#B210A5","analogous":["#53B210","#10B26E"],"triadic":["#1D10B2","#B21D10"],"tetradic":["#1053B2","#B210A5","#B26E10"],"splitComplementary":["#6E10B2","#B21053"],"monochromatic":["#31ED40","#10B21D","#085E0F"]}

Variants

{"light":"#31ED40","dark":"#085E0F","saturated":"#00C210","desaturated":"#259D2F","pastel":"#60E26A","neon":"#00EB14"}

Nearest named colors

[{"slug":"forest-green","name":"Forest Green","hex":"#228B22","distance":43.243496620879306},{"slug":"lime-green","name":"Lime Green","hex":"#32CD32","distance":48.228622207149975},{"slug":"green","name":"Green","hex":"#008000","distance":59.9749947894954},{"slug":"kelly-green","name":"Kelly Green","hex":"#4CBB17","distance":60.96720429870473},{"slug":"traffic-green","name":"Traffic Green","hex":"#008450","distance":70.51950084905593}]

HEX meaning and use

About #10B21D

#10B21D is classified as a cool green value with vibrant and jewel tone visual character. #10B21D is visually closest to Forest Green, a named green color with HEX #228B22.

The RGB channels are 16, 178, and 29, with green carrying the strongest channel weight. In HSL, the hue is 125deg with 84% saturation and 38% lightness, so this page treats it as a high-saturation, mid-lightness 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 rich accent palettes. Its luminance is 0.3204, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 43.24, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text7.41:1AA Pass

White text2.83:1AA Fail

AA text options: #000000, #1A1A1A.

AAA text options: #000000.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #10B21D needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000007.41:1 · AAA

White text#FFFFFF2.83:1 · Fail

Accessible Alternatives

#31ED40#000000 text · best 13.32:1#31ED40

Lime Green#000000 text · best 9.91:1#32CD32

#00C210#000000 text · best 8.72:1#00C210

Kelly Green#000000 text · best 8.43:1#4CBB17

#085E0F#FFFFFF text · best 8.02:1#085E0F

Generated Palette

#10B21D#10B21D

#B210A5#B210A5

#53B210#53B210

#10B26E#10B26E

#31ED40#31ED40

#085E0F#085E0F

Color Harmonies

#B210A5#B210A5

#53B210#53B210

#10B26E#10B26E

#1D10B2#1D10B2

#B21D10#B21D10

Variants

#31ED40#31ED40

#085E0F#085E0F

#00C210#00C210

#259D2F#259D2F

#60E26A#60E26A

#00EB14#00EB14

Nearest Named Colors

Forest Green#228B22

Lime Green#32CD32

Green#008000

Kelly Green#4CBB17

Traffic Green#008450

#10B21D

CSS

Machine-Readable HEX Data (JSON)

About #10B21D

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides