#66CD88
Closest named color: Soft Green (#6FC276). oklch(76.9% 0.139 152.6), rgb(102, 205, 136).
Aa
Black text reads best on this color (10.65:1).
About this color
#66CD88 is a medium-light, moderately saturated green. In OKLCH its lightness is 77%, its chroma 0.139 and its hue 153°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Soft Green (#6FC276), ΔE 0.031 away. Black text reads best on it, at 10.65:1.
| Hue family | Greens |
| Lightness | medium-light (77%) |
| Chroma | moderately saturated (0.139) |
| Temperature | in between |
| Nearest name | Soft Green (#6FC276) |
| Black text | 10.65:1 |
| White text | 1.97:1 |
Values
| HEX | #66CD88 |
| RGB | rgb(102, 205, 136) |
| HSL | hsl(140, 51%, 60%) |
| OKLCH | oklch(76.9% 0.139 152.6) |
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 #66CD88 | 1.97:1 | Fails | Lc -42.2 | Non-text elements, placeholder text |
| Black text on #66CD88 | 10.65:1 | AAA | Lc 66.1 | Content text, not long reading |
| #66CD88 text on white | 1.97:1 | Fails | Lc 37.8 | Non-text elements, placeholder text |
| #66CD88 text on black | 10.65:1 | AAA | Lc -64.6 | 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
#EDF9F0
oklch(97.1% 0.017 153.6)
-
Step 100
100
#D7F2DD
oklch(93.6% 0.04 152.1)
-
Step 200
200
#B3E9C1
oklch(88.6% 0.078 152.6)
-
Step 300
300 (this color)
#66CD88
oklch(76.9% 0.139 152.6)
-
Step 400
400
#00C065
oklch(70.8% 0.184 152.6)
-
Step 500
500
#00A456
oklch(63% 0.163 152.8)
-
Step 600
600
#008A47
oklch(55.5% 0.144 152.6)
-
Step 700
700
#00743B
oklch(49% 0.127 152.7)
-
Step 800
800
#005F2F
oklch(42.5% 0.11 152.7)
-
Step 900
900
#005026
oklch(37.8% 0.099 152.3)
-
Step 950
950
#003014
oklch(27.1% 0.071 152.1)
#66CD88 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) | #CDBF84 | 0.120 |
| Deuteranopia (no green cones) | #BFB58C | 0.118 |
| Tritanopia (no blue cones) | #4ECBBB | 0.072 |
| Achromatopsia (no color) | #B9B9B9 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66CD88
#66CD88
oklch(76.9% 0.139 152.6)
- #E791DA
#E791DA
oklch(76.8% 0.138 332.4)
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 #66CD88, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Green #6FC276 ΔE 0.031
- Emerald #06D6A0 ΔE 0.043
- Seaweed #18D17B ΔE 0.046
- Medium Aquamarine #66CDAA ΔE 0.046
- Greenblue #23C48B ΔE 0.049
- Dark Mint #48C072 ΔE 0.050
- Aqua Green #12E193 ΔE 0.058
- Algae Green #21C36F ΔE 0.060
Use #66CD88 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.