#4ECC9A
Closest named color: Medium Aquamarine (#66CDAA). oklch(76.2% 0.134 163.6), rgb(78, 204, 154).
Aa
Black text reads best on this color (10.42:1).
About this color
#4ECC9A is a medium-light, moderately saturated green. In OKLCH its lightness is 76%, its chroma 0.134 and its hue 164°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Medium Aquamarine (#66CDAA), ΔE 0.030 away. Black text reads best on it, at 10.42:1.
| Hue family | Greens |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.134) |
| Temperature | in between |
| Nearest name | Medium Aquamarine (#66CDAA) |
| Black text | 10.42:1 |
| White text | 2.01:1 |
Values
| HEX | #4ECC9A |
| RGB | rgb(78, 204, 154) |
| HSL | hsl(156, 55%, 55%) |
| OKLCH | oklch(76.2% 0.134 163.6) |
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 #4ECC9A | 2.01:1 | Fails | Lc -43.2 | Non-text elements, placeholder text |
| Black text on #4ECC9A | 10.42:1 | AAA | Lc 65.2 | Content text, not long reading |
| #4ECC9A text on white | 2.01:1 | Fails | Lc 38.8 | Non-text elements, placeholder text |
| #4ECC9A text on black | 10.42:1 | AAA | Lc -63.6 | 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
#EBF9F2
oklch(97% 0.017 164.7)
-
Step 100
100
#D4F3E3
oklch(93.7% 0.039 163.2)
-
Step 200
200
#ACE9CC
oklch(88.5% 0.074 163.9)
-
Step 300
300 (this color)
#4ECC9A
oklch(76.2% 0.134 163.6)
-
Step 400
400
#00BD86
oklch(70.7% 0.151 163.7)
-
Step 500
500
#00A272
oklch(63% 0.135 163.5)
-
Step 600
600
#008860
oklch(55.5% 0.118 164)
-
Step 700
700
#007350
oklch(49.2% 0.105 163.6)
-
Step 800
800
#005E41
oklch(42.7% 0.091 163.9)
-
Step 900
900
#004F35
oklch(37.8% 0.082 162.9)
-
Step 950
950
#002F1E
oklch(27% 0.058 163)
#4ECC9A 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) | #C9BE97 | 0.131 |
| Deuteranopia (no green cones) | #B7B29D | 0.126 |
| Tritanopia (no blue cones) | #00CCBE | 0.052 |
| Achromatopsia (no color) | #B7B7B7 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4ECC9A
#4ECC9A
oklch(76.2% 0.134 163.6)
- #EC8EC7
#EC8EC7
oklch(76.2% 0.133 343.6)
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 #4ECC9A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Aquamarine #66CDAA ΔE 0.030
- Emerald #06D6A0 ΔE 0.031
- Greenblue #23C48B ΔE 0.037
- Soft Green #6FC276 ΔE 0.046
- Green Blue #01C08D ΔE 0.048
- Seaweed #18D17B ΔE 0.054
- Dark Mint #48C072 ΔE 0.055
- Seafoam Blue #78D1B6 ΔE 0.055
Use #4ECC9A 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.