#66B970
Closest named color: Boring Green (#63B365). oklch(71.5% 0.133 146.7), rgb(102, 185, 112).
Aa
Black text reads best on this color (8.73:1).
About this color
#66B970 is a medium-light, moderately saturated green. In OKLCH its lightness is 71%, its chroma 0.133 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 0.019 away. Black text reads best on it, at 8.73:1.
| Hue family | Greens |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.133) |
| Temperature | in between |
| Nearest name | Boring Green (#63B365) |
| Black text | 8.73:1 |
| White text | 2.40:1 |
Values
| HEX | #66B970 |
| RGB | rgb(102, 185, 112) |
| HSL | hsl(127, 37%, 56%) |
| OKLCH | oklch(71.5% 0.133 146.7) |
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 #66B970 | 2.40:1 | Fails | Lc -52.1 | Large or bold text, headings |
| Black text on #66B970 | 8.73:1 | AAA | Lc 56.8 | Large or bold text, headings |
| #66B970 text on white | 2.40:1 | Fails | Lc 47.2 | Large or bold text, headings |
| #66B970 text on black | 8.73:1 | AAA | Lc -54.9 | 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
#9ED0A1
oklch(81% 0.084 146.3)
-
Step 400
400 (this color)
#66B970
oklch(71.5% 0.133 146.7)
-
Step 500
500
#2BA345
oklch(63% 0.169 146.7)
-
Step 600
600
#008C2F
oklch(55.7% 0.167 146.6)
-
Step 700
700
#007526
oklch(49% 0.147 146.7)
-
Step 800
800
#00601E
oklch(42.6% 0.127 146.7)
-
Step 900
900
#035019
oklch(37.6% 0.11 146.8)
-
Step 950
950
#082F10
oklch(27% 0.07 146.9)
#66B970 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) | #BBAC6B | 0.105 |
| Deuteranopia (no green cones) | #AFA474 | 0.103 |
| Tritanopia (no blue cones) | #59B6A7 | 0.078 |
| Achromatopsia (no color) | #A7A7A7 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66B970
#66B970
oklch(71.5% 0.133 146.7)
- #CE84CE
#CE84CE
oklch(71.5% 0.132 326.8)
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 #66B970, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Boring Green #63B365 ΔE 0.019
- Dark Mint #48C072 ΔE 0.027
- Soft Green #6FC276 ΔE 0.028
- Faded Green #7BB274 ΔE 0.030
- Turtle Green #75B84F ΔE 0.035
- Medium Sea Green #3CB371 ΔE 0.038
- Asparagus #77AB56 ΔE 0.041
- Dark Mint Green #20C073 ΔE 0.042
Use #66B970 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.