#66D993
Closest named color: Aqua Green (#12E193). oklch(80% 0.146 154.5), rgb(102, 217, 147).
Aa
Black text reads best on this color (11.91:1).
About this color
#66D993 is a light, vivid green. In OKLCH its lightness is 80%, its chroma 0.146 and its hue 155°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Aqua Green (#12E193), ΔE 0.039 away. Black text reads best on it, at 11.91:1.
| Hue family | Greens |
| Lightness | light (80%) |
| Chroma | vivid (0.146) |
| Temperature | in between |
| Nearest name | Aqua Green (#12E193) |
| Black text | 11.91:1 |
| White text | 1.76:1 |
Values
| HEX | #66D993 |
| RGB | rgb(102, 217, 147) |
| HSL | hsl(143, 60%, 63%) |
| OKLCH | oklch(80% 0.146 154.5) |
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 #66D993 | 1.76:1 | Fails | Lc -36.0 | Non-text elements, placeholder text |
| Black text on #66D993 | 11.91:1 | AAA | Lc 71.8 | Content text, not long reading |
| #66D993 text on white | 1.76:1 | Fails | Lc 32.1 | Non-text elements, placeholder text |
| #66D993 text on black | 11.91:1 | AAA | Lc -70.6 | 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 300.
-
Step 50
50
#ECFAF0
oklch(97.2% 0.02 154.9)
-
Step 100
100
#D5F3DE
oklch(93.7% 0.042 155)
-
Step 200
200
#AFEAC2
oklch(88.6% 0.081 154.8)
-
Step 300
300 (this color)
#66D993
oklch(80% 0.146 154.5)
-
Step 400
400
#00BF6C
oklch(70.6% 0.176 154.5)
-
Step 500
500
#00A45C
oklch(63.1% 0.158 154.5)
-
Step 600
600
#008A4D
oklch(55.6% 0.138 154.7)
-
Step 700
700
#007440
oklch(49.1% 0.122 154.8)
-
Step 800
800
#005F33
oklch(42.6% 0.106 154.6)
-
Step 900
900
#004F2A
oklch(37.6% 0.093 154.9)
-
Step 950
950
#003017
oklch(27.1% 0.068 154.6)
#66D993 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) | #D9CA8F | 0.130 |
| Deuteranopia (no green cones) | #C8BE97 | 0.127 |
| Tritanopia (no blue cones) | #46D7C7 | 0.073 |
| Achromatopsia (no color) | #C3C3C3 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66D993
#66D993
oklch(80% 0.146 154.5)
- #F698E4
#F698E4
oklch(79.9% 0.146 334.2)
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 #66D993, closest first.
No curated palette has a color within ΔE 0.04 of #66D993.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Green #12E193 ΔE 0.039
- Emerald #06D6A0 ΔE 0.042
- Medium Aquamarine #66CDAA ΔE 0.053
- Weird Green #3AE57F ΔE 0.054
- Aqua Marine #2EE8BB ΔE 0.055
- Seaweed #18D17B ΔE 0.056
- Seafoam Blue #78D1B6 ΔE 0.062
- Soft Green #6FC276 ΔE 0.063
Use #66D993 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.