#4ECF99
Closest named color: Emerald (#06D6A0). oklch(76.9% 0.139 162.3), rgb(78, 207, 153).
Aa
Black text reads best on this color (10.70:1).
About this color
#4ECF99 is a medium-light, moderately saturated green. In OKLCH its lightness is 77%, its chroma 0.139 and its hue 162°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Emerald (#06D6A0), ΔE 0.025 away. Black text reads best on it, at 10.70:1.
| Hue family | Greens |
| Lightness | medium-light (77%) |
| Chroma | moderately saturated (0.139) |
| Temperature | in between |
| Nearest name | Emerald (#06D6A0) |
| Black text | 10.70:1 |
| White text | 1.96:1 |
Values
| HEX | #4ECF99 |
| RGB | rgb(78, 207, 153) |
| HSL | hsl(155, 57%, 56%) |
| OKLCH | oklch(76.9% 0.139 162.3) |
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 #4ECF99 | 1.96:1 | Fails | Lc -41.8 | Non-text elements, placeholder text |
| Black text on #4ECF99 | 10.70:1 | AAA | Lc 66.5 | Content text, not long reading |
| #4ECF99 text on white | 1.96:1 | Fails | Lc 37.4 | Non-text elements, placeholder text |
| #4ECF99 text on black | 10.70:1 | AAA | Lc -65.0 | 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
#EBFAF2
oklch(97.2% 0.019 162.9)
-
Step 100
100
#D3F3E2
oklch(93.6% 0.04 162.4)
-
Step 200
200
#ABEACA
oklch(88.6% 0.078 162.2)
-
Step 300
300 (this color)
#4ECF99
oklch(76.9% 0.139 162.3)
-
Step 400
400
#00BD83
oklch(70.6% 0.154 162.4)
-
Step 500
500
#00A270
oklch(63% 0.137 162.6)
-
Step 600
600
#00895D
oklch(55.7% 0.122 162)
-
Step 700
700
#00734E
oklch(49.1% 0.107 162.4)
-
Step 800
800
#005E3F
oklch(42.6% 0.093 162.3)
-
Step 900
900
#004F34
oklch(37.8% 0.083 162.1)
-
Step 950
950
#002F1D
oklch(27% 0.059 161.7)
#4ECF99 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) | #CCC196 | 0.134 |
| Deuteranopia (no green cones) | #BAB49C | 0.129 |
| Tritanopia (no blue cones) | #00CFC0 | 0.056 |
| Achromatopsia (no color) | #B9B9B9 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4ECF99
#4ECF99
oklch(76.9% 0.139 162.3)
- #F08FCC
#F08FCC
oklch(77% 0.138 342.5)
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 #4ECF99, closest first.
No curated palette has a color within ΔE 0.04 of #4ECF99.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Emerald #06D6A0 ΔE 0.025
- Medium Aquamarine #66CDAA ΔE 0.033
- Greenblue #23C48B ΔE 0.042
- Soft Green #6FC276 ΔE 0.047
- Seaweed #18D17B ΔE 0.050
- Green Blue #01C08D ΔE 0.055
- Seafoam Blue #78D1B6 ΔE 0.055
- Aqua Green #12E193 ΔE 0.056
Use #4ECF99 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.