#66CD8F
Closest named color: Soft Green (#6FC276). oklch(77% 0.132 155.2), rgb(102, 205, 143).
Aa
Black text reads best on this color (10.69:1).
About this color
#66CD8F is a medium-light, moderately saturated green. In OKLCH its lightness is 77%, its chroma 0.132 and its hue 155°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Soft Green (#6FC276), ΔE 0.036 away. Black text reads best on it, at 10.69:1.
| Hue family | Greens |
| Lightness | medium-light (77%) |
| Chroma | moderately saturated (0.132) |
| Temperature | in between |
| Nearest name | Soft Green (#6FC276) |
| Black text | 10.69:1 |
| White text | 1.96:1 |
Values
| HEX | #66CD8F |
| RGB | rgb(102, 205, 143) |
| HSL | hsl(144, 51%, 60%) |
| OKLCH | oklch(77% 0.132 155.2) |
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 #66CD8F | 1.96:1 | Fails | Lc -42.0 | Non-text elements, placeholder text |
| Black text on #66CD8F | 10.69:1 | AAA | Lc 66.3 | Content text, not long reading |
| #66CD8F text on white | 1.96:1 | Fails | Lc 37.6 | Non-text elements, placeholder text |
| #66CD8F text on black | 10.69:1 | AAA | Lc -64.8 | 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
#D7F2DF
oklch(93.6% 0.038 154.9)
-
Step 200
200
#B3E8C4
oklch(88.5% 0.074 155)
-
Step 300
300 (this color)
#66CD8F
oklch(77% 0.132 155.2)
-
Step 400
400
#00BF6F
oklch(70.7% 0.174 155.3)
-
Step 500
500
#00A45E
oklch(63.1% 0.156 155.1)
-
Step 600
600
#008A4E
oklch(55.6% 0.137 155)
-
Step 700
700
#007441
oklch(49.1% 0.121 155.2)
-
Step 800
800
#005F34
oklch(42.6% 0.105 155.1)
-
Step 900
900
#004F2B
oklch(37.6% 0.092 155.5)
-
Step 950
950
#003017
oklch(27.1% 0.068 154.6)
#66CD8F 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) | #CCBF8B | 0.118 |
| Deuteranopia (no green cones) | #BDB593 | 0.115 |
| Tritanopia (no blue cones) | #4BCBBD | 0.066 |
| Achromatopsia (no color) | #B9B9B9 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66CD8F
#66CD8F
oklch(77% 0.132 155.2)
- #E893D5
#E893D5
oklch(77% 0.132 335.4)
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 #66CD8F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Green #6FC276 ΔE 0.036
- Medium Aquamarine #66CDAA ΔE 0.037
- Emerald #06D6A0 ΔE 0.040
- Greenblue #23C48B ΔE 0.049
- Seaweed #18D17B ΔE 0.052
- Dark Mint #48C072 ΔE 0.055
- Seafoam Blue #78D1B6 ΔE 0.057
- Dark Sea Green #8FBC8F ΔE 0.059
Use #66CD8F 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.