#18DAD4
Closest named color: Turquoise (#40E0D0). oklch(80.4% 0.136 191.2), rgb(24, 218, 212).
Aa
Black text reads best on this color (12.01:1).
About this color
#18DAD4 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 80%, its chroma 0.136 and its hue 191°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.024 away. Black text reads best on it, at 12.01:1.
| Hue family | Teals and cyans |
| Lightness | light (80%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 12.01:1 |
| White text | 1.74:1 |
Values
| HEX | #18DAD4 |
| RGB | rgb(24, 218, 212) |
| HSL | hsl(178, 80%, 47%) |
| OKLCH | oklch(80.4% 0.136 191.2) |
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 #18DAD4 | 1.74:1 | Fails | Lc -35.1 | Non-text elements, placeholder text |
| Black text on #18DAD4 | 12.01:1 | AAA | Lc 72.6 | Content text, not long reading |
| #18DAD4 text on white | 1.74:1 | Fails | Lc 31.2 | Non-text elements, placeholder text |
| #18DAD4 text on black | 12.01:1 | AAA | Lc -71.5 | 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
#E8FAF8
oklch(97.1% 0.019 188.8)
-
Step 100
100
#CDF3F0
oklch(93.6% 0.039 190.6)
-
Step 200
200
#9DEAE5
oklch(88.6% 0.076 190.7)
-
Step 300
300 (this color)
#18DAD4
oklch(80.4% 0.136 191.2)
-
Step 400
400
#00B8B3
oklch(70.7% 0.122 191.3)
-
Step 500
500
#009E99
oklch(63.1% 0.109 190.8)
-
Step 600
600
#008581
oklch(55.7% 0.096 191.1)
-
Step 700
700
#00706C
oklch(49.2% 0.085 190.4)
-
Step 800
800
#005B59
oklch(42.6% 0.073 192.2)
-
Step 900
900
#004C4A
oklch(37.6% 0.065 191.7)
-
Step 950
950
#002D2C
oklch(26.9% 0.046 192.5)
#18DAD4 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) | #CCCED4 | 0.143 |
| Deuteranopia (no green cones) | #B4BCD5 | 0.135 |
| Tritanopia (no blue cones) | #00E0D8 | 0.016 |
| Achromatopsia (no color) | #C4C4C4 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18DAD4
#18DAD4
oklch(80.4% 0.136 191.2)
- #FF9FAC
#FF9FAC
oklch(80.3% 0.115 11.2)
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 #18DAD4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.024
- Medium Turquoise #48D1CC ΔE 0.026
- Aqua Blue #02D8E9 ΔE 0.033
- Dark Turquoise #00CED1 ΔE 0.034
- Seafoam Blue #78D1B6 ΔE 0.056
- Medium Aquamarine #66CDAA ΔE 0.060
- Aqua Marine #2EE8BB ΔE 0.061
- Pale Teal #82CBB2 ΔE 0.068
Use #18DAD4 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.