#81CC99
Closest named color: Medium Aquamarine (#66CDAA). oklch(78.2% 0.105 153.6), rgb(129, 204, 153).
Aa
Black text reads best on this color (11.03:1).
About this color
#81CC99 is a light, moderately saturated green. In OKLCH its lightness is 78%, its chroma 0.105 and its hue 154°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Medium Aquamarine (#66CDAA), ΔE 0.029 away. Black text reads best on it, at 11.03:1.
| Hue family | Greens |
| Lightness | light (78%) |
| Chroma | moderately saturated (0.105) |
| Temperature | in between |
| Nearest name | Medium Aquamarine (#66CDAA) |
| Black text | 11.03:1 |
| White text | 1.90:1 |
Values
| HEX | #81CC99 |
| RGB | rgb(129, 204, 153) |
| HSL | hsl(139, 42%, 65%) |
| OKLCH | oklch(78.2% 0.105 153.6) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #81CC99 | 1.90:1 | Fails | Lc -40.4 | Non-text elements, placeholder text |
| Black text on #81CC99 | 11.03:1 | AAA | Lc 67.7 | Content text, not long reading |
| #81CC99 text on white | 1.90:1 | Fails | Lc 36.2 | Non-text elements, placeholder text |
| #81CC99 text on black | 11.03:1 | AAA | Lc -66.3 | Content text, not long reading |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 300.
-
Step 50
50
#EFF8F1
oklch(97% 0.013 152.6)
-
Step 100
100
#DBF0E1
oklch(93.6% 0.03 154.7)
-
Step 200
200
#BDE5C8
oklch(88.5% 0.058 153.6)
-
Step 300
300 (this color)
#81CC99
oklch(78.2% 0.105 153.6)
-
Step 400
400
#29BE6D
oklch(70.8% 0.168 153.5)
-
Step 500
500
#00A459
oklch(63% 0.16 153.6)
-
Step 600
600
#008A4A
oklch(55.6% 0.141 153.6)
-
Step 700
700
#00743D
oklch(49% 0.125 153.5)
-
Step 800
800
#005F31
oklch(42.6% 0.108 153.6)
-
Step 900
900
#005028
oklch(37.8% 0.097 153.4)
-
Step 950
950
#003016
oklch(27.1% 0.069 153.7)
#81CC99 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #CCC196 | 0.093 |
| Deuteranopia (no green cones) | #C0B99C | 0.090 |
| Tritanopia (no blue cones) | #73CABE | 0.053 |
| Achromatopsia (no color) | #BCBCBC | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #81CC99
#81CC99
oklch(78.2% 0.105 153.6)
- #E19FD4
#E19FD4
oklch(78.2% 0.104 333.7)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #81CC99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Aquamarine #66CDAA ΔE 0.029
- Pale Teal #82CBB2 ΔE 0.036
- Seafoam Blue #78D1B6 ΔE 0.037
- Dark Sea Green #8FBC8F ΔE 0.043
- Light Moss Green #A6C875 ΔE 0.052
- Soft Green #6FC276 ΔE 0.053
- Tiffany Blue #94D2BD ΔE 0.055
- Lichen #8FB67B ΔE 0.060
Use #81CC99 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.