#4ECDB9
Closest named color: Medium Aquamarine (#66CDAA). oklch(77.3% 0.115 180.9), rgb(78, 205, 185).
Aa
Black text reads best on this color (10.75:1).
About this color
#4ECDB9 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 77%, its chroma 0.115 and its hue 181°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Aquamarine (#66CDAA), ΔE 0.025 away. Black text reads best on it, at 10.75:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (77%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Medium Aquamarine (#66CDAA) |
| Black text | 10.75:1 |
| White text | 1.95:1 |
Values
| HEX | #4ECDB9 |
| RGB | rgb(78, 205, 185) |
| HSL | hsl(171, 56%, 55%) |
| OKLCH | oklch(77.3% 0.115 180.9) |
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 #4ECDB9 | 1.95:1 | Fails | Lc -41.6 | Non-text elements, placeholder text |
| Black text on #4ECDB9 | 10.75:1 | AAA | Lc 66.7 | Content text, not long reading |
| #4ECDB9 text on white | 1.95:1 | Fails | Lc 37.2 | Non-text elements, placeholder text |
| #4ECDB9 text on black | 10.75:1 | AAA | Lc -65.2 | 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
#EBF9F6
oklch(97.1% 0.015 181.8)
-
Step 100
100
#D3F2EB
oklch(93.7% 0.034 180.4)
-
Step 200
200
#ABE8DB
oklch(88.6% 0.064 180.1)
-
Step 300
300 (this color)
#4ECDB9
oklch(77.3% 0.115 180.9)
-
Step 400
400
#00BAA5
oklch(70.7% 0.128 180.9)
-
Step 500
500
#009F8D
oklch(63% 0.114 181)
-
Step 600
600
#008676
oklch(55.6% 0.1 180.5)
-
Step 700
700
#007163
oklch(49.2% 0.089 180.3)
-
Step 800
800
#005C51
oklch(42.6% 0.077 181.1)
-
Step 900
900
#004D43
oklch(37.7% 0.068 180.3)
-
Step 950
950
#002E28
oklch(27% 0.049 181.5)
#4ECDB9 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) | #C4C2B8 | 0.121 |
| Deuteranopia (no green cones) | #B2B4BB | 0.116 |
| Tritanopia (no blue cones) | #00D0C7 | 0.026 |
| Achromatopsia (no color) | #B9B9B9 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4ECDB9
#4ECDB9
oklch(77.3% 0.115 180.9)
- #F295B1
#F295B1
oklch(77.3% 0.116 0.7)
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 #4ECDB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Aquamarine #66CDAA ΔE 0.025
- Medium Turquoise #48D1CC ΔE 0.026
- Seafoam Blue #78D1B6 ΔE 0.035
- Dark Turquoise #00CED1 ΔE 0.037
- Pale Teal #82CBB2 ΔE 0.040
- Turquoise #40E0D0 ΔE 0.053
- Emerald #06D6A0 ΔE 0.056
- Topaz #13BBAF ΔE 0.060
Use #4ECDB9 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.