#66BC73
Closest named color: Soft Green (#6FC276). oklch(72.3% 0.134 147.4), rgb(102, 188, 115).
Aa
Black text reads best on this color (9.00:1).
About this color
#66BC73 is a medium-light, moderately saturated green. In OKLCH its lightness is 72%, its chroma 0.134 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 0.020 away. Black text reads best on it, at 9.00:1.
| Hue family | Greens |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.134) |
| Temperature | in between |
| Nearest name | Soft Green (#6FC276) |
| Black text | 9.00:1 |
| White text | 2.33:1 |
Values
| HEX | #66BC73 |
| RGB | rgb(102, 188, 115) |
| HSL | hsl(129, 39%, 57%) |
| OKLCH | oklch(72.3% 0.134 147.4) |
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 #66BC73 | 2.33:1 | Fails | Lc -50.7 | Large or bold text, headings |
| Black text on #66BC73 | 9.00:1 | AAA | Lc 58.2 | Large or bold text, headings |
| #66BC73 text on white | 2.33:1 | Fails | Lc 45.8 | Large or bold text, headings |
| #66BC73 text on black | 9.00:1 | AAA | Lc -56.3 | 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
#9CD0A2
oklch(80.9% 0.084 147.8)
-
Step 400
400 (this color)
#66BC73
oklch(72.3% 0.134 147.4)
-
Step 500
500
#24A446
oklch(63.1% 0.172 147.4)
-
Step 600
600
#008B33
oklch(55.5% 0.163 147.4)
-
Step 700
700
#00752A
oklch(49% 0.144 147.5)
-
Step 800
800
#006021
oklch(42.6% 0.125 147.5)
-
Step 900
900
#00501A
oklch(37.6% 0.11 147.5)
-
Step 950
950
#072F10
oklch(26.9% 0.07 147.3)
#66BC73 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) | #BEAF6E | 0.108 |
| Deuteranopia (no green cones) | #B2A677 | 0.107 |
| Tritanopia (no blue cones) | #58B9AA | 0.078 |
| Achromatopsia (no color) | #AAAAAA | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BC73
#66BC73
oklch(72.3% 0.134 147.4)
- #D286D1
#D286D1
oklch(72.3% 0.134 327.3)
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 #66BC73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Green #6FC276 ΔE 0.020
- Dark Mint #48C072 ΔE 0.024
- Boring Green #63B365 ΔE 0.027
- Faded Green #7BB274 ΔE 0.034
- Turtle Green #75B84F ΔE 0.037
- Dark Mint Green #20C073 ΔE 0.040
- Greenblue #23C48B ΔE 0.042
- Medium Sea Green #3CB371 ΔE 0.044
Use #66BC73 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.