#66B671
Closest named color: Boring Green (#63B365). oklch(70.7% 0.127 147.2), rgb(102, 182, 113).
Aa
Black text reads best on this color (8.49:1).
About this color
#66B671 is a medium-light, moderately saturated green. In OKLCH its lightness is 71%, its chroma 0.127 and its hue 147°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Boring Green (#63B365), ΔE 0.016 away. Black text reads best on it, at 8.49:1.
| Hue family | Greens |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.127) |
| Temperature | in between |
| Nearest name | Boring Green (#63B365) |
| Black text | 8.49:1 |
| White text | 2.47:1 |
Values
| HEX | #66B671 |
| RGB | rgb(102, 182, 113) |
| HSL | hsl(128, 35%, 56%) |
| OKLCH | oklch(70.7% 0.127 147.2) |
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 #66B671 | 2.47:1 | Fails | Lc -53.5 | Large or bold text, headings |
| Black text on #66B671 | 8.49:1 | AAA | Lc 55.6 | Large or bold text, headings |
| #66B671 text on white | 2.47:1 | Fails | Lc 48.4 | Large or bold text, headings |
| #66B671 text on black | 8.49:1 | AAA | Lc -53.6 | 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
#F1F7F1
oklch(97% 0.01 145.5)
-
Step 100
100
#E0EEE1
oklch(93.5% 0.023 147.4)
-
Step 200
200
#C7E2C9
oklch(88.6% 0.044 147.3)
-
Step 300
300
#9FCFA3
oklch(80.9% 0.079 147)
-
Step 400
400 (this color)
#66B671
oklch(70.7% 0.127 147.2)
-
Step 500
500
#31A34A
oklch(63.2% 0.163 147.2)
-
Step 600
600
#008B32
oklch(55.5% 0.164 147.3)
-
Step 700
700
#007529
oklch(49% 0.144 147.3)
-
Step 800
800
#006020
oklch(42.6% 0.126 147.3)
-
Step 900
900
#08501C
oklch(37.8% 0.106 147.2)
-
Step 950
950
#0A2F11
oklch(27% 0.068 146.8)
#66B671 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) | #B8AA6C | 0.102 |
| Deuteranopia (no green cones) | #ACA275 | 0.100 |
| Tritanopia (no blue cones) | #5AB3A5 | 0.075 |
| Achromatopsia (no color) | #A5A5A5 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66B671
#66B671
oklch(70.7% 0.127 147.2)
- #CA83CA
#CA83CA
oklch(70.7% 0.127 326.8)
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 #66B671, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Boring Green #63B365 ΔE 0.016
- Faded Green #7BB274 ΔE 0.025
- Dark Mint #48C072 ΔE 0.034
- Medium Sea Green #3CB371 ΔE 0.034
- Algae #54AC68 ΔE 0.035
- Soft Green #6FC276 ΔE 0.036
- Asparagus #77AB56 ΔE 0.036
- Tea #65AB7C ΔE 0.039
Use #66B671 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.