#66B975
Closest named color: Boring Green (#63B365). oklch(71.6% 0.128 148.3), rgb(102, 185, 117).
Aa
Black text reads best on this color (8.76:1).
About this color
#66B975 is a medium-light, moderately saturated green. In OKLCH its lightness is 72%, its chroma 0.128 and its hue 148°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Boring Green (#63B365), ΔE 0.023 away. Black text reads best on it, at 8.76:1.
| Hue family | Greens |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.128) |
| Temperature | in between |
| Nearest name | Boring Green (#63B365) |
| Black text | 8.76:1 |
| White text | 2.39:1 |
Values
| HEX | #66B975 |
| RGB | rgb(102, 185, 117) |
| HSL | hsl(131, 37%, 56%) |
| OKLCH | oklch(71.6% 0.128 148.3) |
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 #66B975 | 2.39:1 | Fails | Lc -52.0 | Large or bold text, headings |
| Black text on #66B975 | 8.76:1 | AAA | Lc 56.9 | Large or bold text, headings |
| #66B975 text on white | 2.39:1 | Fails | Lc 47.0 | Large or bold text, headings |
| #66B975 text on black | 8.76:1 | AAA | Lc -55.0 | 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
#E0EEE1
oklch(93.5% 0.023 147.4)
-
Step 200
200
#C6E2C9
oklch(88.5% 0.045 148.2)
-
Step 300
300
#9ECFA4
oklch(80.8% 0.079 148.1)
-
Step 400
400 (this color)
#66B975
oklch(71.6% 0.128 148.3)
-
Step 500
500
#2AA34C
oklch(63.1% 0.163 148.3)
-
Step 600
600
#008B37
oklch(55.5% 0.16 148.3)
-
Step 700
700
#00752D
oklch(49.1% 0.141 148.2)
-
Step 800
800
#006024
oklch(42.7% 0.122 148.4)
-
Step 900
900
#03501D
oklch(37.7% 0.107 148.1)
-
Step 950
950
#082F12
oklch(27% 0.068 148.2)
#66B975 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) | #BBAC70 | 0.105 |
| Deuteranopia (no green cones) | #AEA479 | 0.102 |
| Tritanopia (no blue cones) | #58B6A8 | 0.073 |
| Achromatopsia (no color) | #A7A7A7 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66B975
#66B975
oklch(71.6% 0.128 148.3)
- #CE85CB
#CE85CB
oklch(71.5% 0.128 328.2)
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 #66B975, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Boring Green #63B365 ΔE 0.023
- Faded Green #7BB274 ΔE 0.027
- Soft Green #6FC276 ΔE 0.028
- Dark Mint #48C072 ΔE 0.030
- Medium Sea Green #3CB371 ΔE 0.039
- Sage Green #88B378 ΔE 0.039
- Turtle Green #75B84F ΔE 0.041
- Algae #54AC68 ΔE 0.043
Use #66B975 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.