#66BB71
Closest named color: Soft Green (#6FC276). oklch(72% 0.135 146.9), rgb(102, 187, 113).
Aa
Black text reads best on this color (8.91:1).
About this color
#66BB71 is a medium-light, moderately saturated green. In OKLCH its lightness is 72%, its chroma 0.135 and its hue 147°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Soft Green (#6FC276), ΔE 0.023 away. Black text reads best on it, at 8.91:1.
| Hue family | Greens |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.135) |
| Temperature | in between |
| Nearest name | Soft Green (#6FC276) |
| Black text | 8.91:1 |
| White text | 2.35:1 |
Values
| HEX | #66BB71 |
| RGB | rgb(102, 187, 113) |
| HSL | hsl(128, 38%, 57%) |
| OKLCH | oklch(72% 0.135 146.9) |
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 #66BB71 | 2.35:1 | Fails | Lc -51.2 | Large or bold text, headings |
| Black text on #66BB71 | 8.91:1 | AAA | Lc 57.7 | Large or bold text, headings |
| #66BB71 text on white | 2.35:1 | Fails | Lc 46.3 | Large or bold text, headings |
| #66BB71 text on black | 8.91:1 | AAA | Lc -55.8 | Large or bold text, headings |
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 400.
-
Step 50
50
#F1F8F1
oklch(97.2% 0.012 145.5)
-
Step 100
100
#E0EFE1
oklch(93.7% 0.024 147.3)
-
Step 200
200
#C6E2C8
oklch(88.5% 0.046 147.2)
-
Step 300
300
#9DD0A1
oklch(80.9% 0.084 146.8)
-
Step 400
400 (this color)
#66BB71
oklch(72% 0.135 146.9)
-
Step 500
500
#27A444
oklch(63.2% 0.172 146.8)
-
Step 600
600
#008B30
oklch(55.5% 0.165 146.9)
-
Step 700
700
#007527
oklch(49% 0.146 146.9)
-
Step 800
800
#00601F
oklch(42.6% 0.127 147)
-
Step 900
900
#005018
oklch(37.6% 0.112 146.9)
-
Step 950
950
#072F10
oklch(26.9% 0.07 147.3)
#66BB71 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) | #BDAE6C | 0.107 |
| Deuteranopia (no green cones) | #B1A676 | 0.105 |
| Tritanopia (no blue cones) | #59B8A9 | 0.079 |
| Achromatopsia (no color) | #A9A9A9 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BB71
#66BB71
oklch(72% 0.135 146.9)
- #D085D0
#D085D0
oklch(71.9% 0.134 326.9)
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 #66BB71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Green #6FC276 ΔE 0.023
- Boring Green #63B365 ΔE 0.024
- Dark Mint #48C072 ΔE 0.025
- Faded Green #7BB274 ΔE 0.033
- Turtle Green #75B84F ΔE 0.035
- Dark Mint Green #20C073 ΔE 0.040
- Medium Sea Green #3CB371 ΔE 0.042
- Cool Green #33B864 ΔE 0.043
Use #66BB71 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.