#66BC6B
Closest named color: Dark Mint (#48C072). oklch(72.1% 0.142 145.1), rgb(102, 188, 107).
Aa
Black text reads best on this color (8.97:1).
About this color
#66BC6B is a medium-light, vivid green. In OKLCH its lightness is 72%, its chroma 0.142 and its hue 145°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Mint (#48C072), ΔE 0.022 away. Black text reads best on it, at 8.97:1.
| Hue family | Greens |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.142) |
| Temperature | in between |
| Nearest name | Dark Mint (#48C072) |
| Black text | 8.97:1 |
| White text | 2.34:1 |
Values
| HEX | #66BC6B |
| RGB | rgb(102, 188, 107) |
| HSL | hsl(123, 39%, 57%) |
| OKLCH | oklch(72.1% 0.142 145.1) |
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 #66BC6B | 2.34:1 | Fails | Lc -50.9 | Large or bold text, headings |
| Black text on #66BC6B | 8.97:1 | AAA | Lc 58.0 | Large or bold text, headings |
| #66BC6B text on white | 2.34:1 | Fails | Lc 46.0 | Large or bold text, headings |
| #66BC6B text on black | 8.97:1 | AAA | Lc -56.1 | 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
#E0EFE0
oklch(93.7% 0.026 145.4)
-
Step 200
200
#C6E2C6
oklch(88.5% 0.048 145.2)
-
Step 300
300
#9DD09D
oklch(80.8% 0.089 144.7)
-
Step 400
400 (this color)
#66BC6B
oklch(72.1% 0.142 145.1)
-
Step 500
500
#26A439
oklch(63% 0.181 145.1)
-
Step 600
600
#008C25
oklch(55.6% 0.174 145.1)
-
Step 700
700
#00761D
oklch(49.2% 0.154 145)
-
Step 800
800
#006116
oklch(42.8% 0.135 145)
-
Step 900
900
#005111
oklch(37.8% 0.119 145.1)
-
Step 950
950
#072F0C
oklch(26.9% 0.074 145.1)
#66BC6B 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) | #BFAE65 | 0.110 |
| Deuteranopia (no green cones) | #B3A670 | 0.109 |
| Tritanopia (no blue cones) | #5AB8A8 | 0.086 |
| Achromatopsia (no color) | #A9A9A9 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BC6B
#66BC6B
oklch(72.1% 0.142 145.1)
- #D184D6
#D184D6
oklch(72.1% 0.142 324.8)
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 #66BC6B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Mint #48C072 ΔE 0.022
- Soft Green #6FC276 ΔE 0.022
- Boring Green #63B365 ΔE 0.026
- Turtle Green #75B84F ΔE 0.028
- Dark Mint Green #20C073 ΔE 0.038
- Faded Green #7BB274 ΔE 0.039
- Algae Green #21C36F ΔE 0.040
- Cool Green #33B864 ΔE 0.041
Use #66BC6B 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.