#66BF6B
Closest named color: Soft Green (#6FC276). oklch(72.9% 0.147 145), rgb(102, 191, 107).
Aa
Black text reads best on this color (9.22:1).
About this color
#66BF6B is a medium-light, vivid green. In OKLCH its lightness is 73%, its chroma 0.147 and its hue 145°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Soft Green (#6FC276), ΔE 0.018 away. Black text reads best on it, at 9.22:1.
| Hue family | Greens |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.147) |
| Temperature | in between |
| Nearest name | Soft Green (#6FC276) |
| Black text | 9.22:1 |
| White text | 2.27:1 |
Values
| HEX | #66BF6B |
| RGB | rgb(102, 191, 107) |
| HSL | hsl(123, 41%, 57%) |
| OKLCH | oklch(72.9% 0.147 145) |
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 #66BF6B | 2.27:1 | Fails | Lc -49.5 | Large or bold text, headings |
| Black text on #66BF6B | 9.22:1 | AAA | Lc 59.3 | Large or bold text, headings |
| #66BF6B text on white | 2.27:1 | Fails | Lc 44.6 | Non-text elements, placeholder text |
| #66BF6B text on black | 9.22:1 | AAA | Lc -57.5 | 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
#F1F8F0
oklch(97.2% 0.013 141.8)
-
Step 100
100
#DFEFDF
oklch(93.6% 0.027 145.4)
-
Step 200
200
#C5E3C5
oklch(88.6% 0.052 145.1)
-
Step 300
300
#9BD19C
oklch(80.9% 0.093 145.1)
-
Step 400
400 (this color)
#66BF6B
oklch(72.9% 0.147 145)
-
Step 500
500
#1EA535
oklch(63.1% 0.187 145)
-
Step 600
600
#008C24
oklch(55.6% 0.175 145)
-
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
#05300B
oklch(27.1% 0.078 145.2)
#66BF6B 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) | #C2B165 | 0.113 |
| Deuteranopia (no green cones) | #B5A970 | 0.110 |
| Tritanopia (no blue cones) | #59BBAB | 0.090 |
| Achromatopsia (no color) | #ACACAC | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BF6B
#66BF6B
oklch(72.9% 0.147 145)
- #D585DA
#D585DA
oklch(72.9% 0.147 324.9)
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 #66BF6B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Green #6FC276 ΔE 0.018
- Dark Mint #48C072 ΔE 0.022
- Turtle Green #75B84F ΔE 0.029
- Boring Green #63B365 ΔE 0.034
- Algae Green #21C36F ΔE 0.038
- Dark Mint Green #20C073 ΔE 0.039
- Cool Green #33B864 ΔE 0.044
- Greenblue #23C48B ΔE 0.046
Use #66BF6B 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.