#66CA6B
Closest named color: Soft Green (#6FC276). oklch(75.6% 0.162 144.7), rgb(102, 202, 107).
Aa
Black text reads best on this color (10.22:1).
About this color
#66CA6B is a medium-light, vivid green. In OKLCH its lightness is 76%, its chroma 0.162 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 0.031 away. Black text reads best on it, at 10.22:1.
| Hue family | Greens |
| Lightness | medium-light (76%) |
| Chroma | vivid (0.162) |
| Temperature | in between |
| Nearest name | Soft Green (#6FC276) |
| Black text | 10.22:1 |
| White text | 2.05:1 |
Values
| HEX | #66CA6B |
| RGB | rgb(102, 202, 107) |
| HSL | hsl(123, 49%, 60%) |
| OKLCH | oklch(75.6% 0.162 144.7) |
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 #66CA6B | 2.05:1 | Fails | Lc -44.3 | Non-text elements, placeholder text |
| Black text on #66CA6B | 10.22:1 | AAA | Lc 64.2 | Content text, not long reading |
| #66CA6B text on white | 2.05:1 | Fails | Lc 39.8 | Non-text elements, placeholder text |
| #66CA6B text on black | 10.22:1 | AAA | Lc -62.5 | Content text, not long reading |
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
#F0F8F0
oklch(97.1% 0.014 145.5)
-
Step 100
100
#DEEFDE
oklch(93.5% 0.029 145.3)
-
Step 200
200
#C3E4C3
oklch(88.6% 0.057 145.1)
-
Step 300
300
#97D298
oklch(80.8% 0.101 145)
-
Step 400
400 (this color)
#66CA6B
oklch(75.6% 0.162 144.7)
-
Step 500
500
#00A62A
oklch(63% 0.2 144.8)
-
Step 600
600
#008C22
oklch(55.6% 0.176 144.8)
-
Step 700
700
#00761B
oklch(49.2% 0.156 144.8)
-
Step 800
800
#006114
oklch(42.8% 0.136 144.7)
-
Step 900
900
#00510F
oklch(37.8% 0.12 144.7)
-
Step 950
950
#003006
oklch(26.9% 0.085 144.8)
#66CA6B 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) | #CDBB63 | 0.123 |
| Deuteranopia (no green cones) | #BFB171 | 0.122 |
| Tritanopia (no blue cones) | #57C5B4 | 0.101 |
| Achromatopsia (no color) | #B5B5B5 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66CA6B
#66CA6B
oklch(75.6% 0.162 144.7)
- #E289E8
#E289E8
oklch(75.6% 0.162 324.7)
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 #66CA6B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Green #6FC276 ΔE 0.031
- Seaweed #18D17B ΔE 0.037
- Dark Mint #48C072 ΔE 0.040
- Apple #6ECB3C ΔE 0.043
- Algae Green #21C36F ΔE 0.046
- Turtle Green #75B84F ΔE 0.049
- Dark Mint Green #20C073 ΔE 0.053
- Fresh Green #69D84F ΔE 0.054
Use #66CA6B 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.