#66C045
Closest named color: Turtle Green (#75B84F). oklch(72.6% 0.181 138.4), rgb(102, 192, 69).
Aa
Black text reads best on this color (9.19:1).
About this color
#66C045 is a medium-light, vivid green. In OKLCH its lightness is 73%, its chroma 0.181 and its hue 138°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Turtle Green (#75B84F), ΔE 0.030 away. Black text reads best on it, at 9.19:1.
| Hue family | Greens |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.181) |
| Temperature | in between |
| Nearest name | Turtle Green (#75B84F) |
| Black text | 9.19:1 |
| White text | 2.28:1 |
Values
| HEX | #66C045 |
| RGB | rgb(102, 192, 69) |
| HSL | hsl(104, 49%, 51%) |
| OKLCH | oklch(72.6% 0.181 138.4) |
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 #66C045 | 2.28:1 | Fails | Lc -49.6 | Large or bold text, headings |
| Black text on #66C045 | 9.19:1 | AAA | Lc 59.2 | Large or bold text, headings |
| #66C045 text on white | 2.28:1 | Fails | Lc 44.8 | Non-text elements, placeholder text |
| #66C045 text on black | 9.19:1 | AAA | Lc -57.3 | 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
#F1F8EE
oklch(97.1% 0.015 136.1)
-
Step 100
100
#DFF0DB
oklch(93.7% 0.033 139.7)
-
Step 200
200
#C5E4BC
oklch(88.6% 0.063 138.7)
-
Step 300
300
#9CD28A
oklch(80.8% 0.113 138.1)
-
Step 400
400 (this color)
#66C045
oklch(72.6% 0.181 138.4)
-
Step 500
500
#3FA300
oklch(63.1% 0.197 138.4)
-
Step 600
600
#348900
oklch(55.6% 0.173 138.4)
-
Step 700
700
#2A7300
oklch(49% 0.153 138.4)
-
Step 800
800
#215F00
oklch(42.8% 0.134 138.5)
-
Step 900
900
#1B4F00
oklch(37.7% 0.117 138.3)
-
Step 950
950
#0D2F00
oklch(26.9% 0.084 138.2)
#66C045 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) | #C6B036 | 0.119 |
| Deuteranopia (no green cones) | #BAA94F | 0.119 |
| Tritanopia (no blue cones) | #60BAA6 | 0.124 |
| Achromatopsia (no color) | #ABABAB | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66C045
#66C045
oklch(72.6% 0.181 138.4)
- #D57DEF
#D57DEF
oklch(72.7% 0.181 318.2)
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 #66C045, closest first.
No curated palette has a color within ΔE 0.04 of #66C045.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turtle Green #75B84F ΔE 0.030
- Dark Lime Green #7EBD01 ΔE 0.032
- Leafy Green #51B73B ΔE 0.034
- Apple #6ECB3C ΔE 0.035
- Frog Green #58BC08 ΔE 0.036
- Dark Lime #84B701 ΔE 0.038
- Shamrock Green #02C14D ΔE 0.044
- Dark Mint #48C072 ΔE 0.047
Use #66C045 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.