#18D4AE
Closest named color: Emerald (#06D6A0). oklch(77.7% 0.146 173.2), rgb(24, 212, 174).
Aa
Black text reads best on this color (11.06:1).
About this color
#18D4AE is a medium-light, vivid teal or cyan. In OKLCH its lightness is 78%, its chroma 0.146 and its hue 173°. Its hue sits on the cool side of the wheel. The nearest named color is Emerald (#06D6A0), ΔE 0.022 away. Black text reads best on it, at 11.06:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (78%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Emerald (#06D6A0) |
| Black text | 11.06:1 |
| White text | 1.89:1 |
Values
| HEX | #18D4AE |
| RGB | rgb(24, 212, 174) |
| HSL | hsl(168, 80%, 46%) |
| OKLCH | oklch(77.7% 0.146 173.2) |
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 #18D4AE | 1.89:1 | Fails | Lc -39.7 | Non-text elements, placeholder text |
| Black text on #18D4AE | 11.06:1 | AAA | Lc 68.4 | Content text, not long reading |
| #18D4AE text on white | 1.89:1 | Fails | Lc 35.5 | Non-text elements, placeholder text |
| #18D4AE text on black | 11.06:1 | AAA | Lc -67.0 | 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
#E9FAF4
oklch(97.1% 0.02 172.8)
-
Step 100
100
#CEF4E7
oklch(93.7% 0.043 172.6)
-
Step 200
200
#A0EBD4
oklch(88.5% 0.081 173.2)
-
Step 300
300 (this color)
#18D4AE
oklch(77.7% 0.146 173.2)
-
Step 400
400
#00BB99
oklch(70.6% 0.135 173.4)
-
Step 500
500
#00A183
oklch(63.2% 0.121 173.2)
-
Step 600
600
#00876E
oklch(55.6% 0.106 173.6)
-
Step 700
700
#00725C
oklch(49.2% 0.094 173.1)
-
Step 800
800
#005D4B
oklch(42.7% 0.081 173.5)
-
Step 900
900
#004E3E
oklch(37.8% 0.073 172.9)
-
Step 950
950
#002E24
oklch(26.9% 0.051 173.7)
#18D4AE 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) | #CDC5AC | 0.152 |
| Deuteranopia (no green cones) | #B7B6B1 | 0.144 |
| Tritanopia (no blue cones) | #00D6C9 | 0.037 |
| Achromatopsia (no color) | #BCBCBC | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18D4AE
#18D4AE
oklch(77.7% 0.146 173.2)
- #FD8DBE
#FD8DBE
oklch(77.8% 0.146 353.4)
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 #18D4AE, closest first.
No curated palette has a color within ΔE 0.04 of #18D4AE.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Emerald #06D6A0 ΔE 0.022
- Medium Aquamarine #66CDAA ΔE 0.037
- Medium Turquoise #48D1CC ΔE 0.052
- Seafoam Blue #78D1B6 ΔE 0.055
- Turquoise #40E0D0 ΔE 0.055
- Greenblue #23C48B ΔE 0.056
- Aqua Marine #2EE8BB ΔE 0.057
- Dark Turquoise #00CED1 ΔE 0.058
Use #18D4AE 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.