#18E5D8
Closest named color: Turquoise (#40E0D0). oklch(83.2% 0.142 187.5), rgb(24, 229, 216).
Aa
Black text reads best on this color (13.23:1).
About this color
#18E5D8 is a light, vivid teal or cyan. In OKLCH its lightness is 83%, its chroma 0.142 and its hue 187°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.016 away. Black text reads best on it, at 13.23:1.
| Hue family | Teals and cyans |
| Lightness | light (83%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 13.23:1 |
| White text | 1.58:1 |
Values
| HEX | #18E5D8 |
| RGB | rgb(24, 229, 216) |
| HSL | hsl(176, 81%, 50%) |
| OKLCH | oklch(83.2% 0.142 187.5) |
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 #18E5D8 | 1.58:1 | Fails | Lc -29.4 | Dividers and decoration only |
| Black text on #18E5D8 | 13.23:1 | AAA | Lc 77.8 | Fine for body text |
| #18E5D8 text on white | 1.58:1 | Fails | Lc 26.0 | Dividers and decoration only |
| #18E5D8 text on black | 13.23:1 | AAA | Lc -77.1 | Fine for body text |
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
#CCF3EF
oklch(93.5% 0.041 188.9)
-
Step 200
200
#9BEBE2
oklch(88.6% 0.079 186.9)
-
Step 300
300 (this color)
#18E5D8
oklch(83.2% 0.142 187.5)
-
Step 400
400
#00B9AE
oklch(70.8% 0.123 187.3)
-
Step 500
500
#009E95
oklch(63% 0.11 187.7)
-
Step 600
600
#00857D
oklch(55.5% 0.097 187.4)
-
Step 700
700
#007069
oklch(49.1% 0.086 187.3)
-
Step 800
800
#005C56
oklch(42.8% 0.075 187.1)
-
Step 900
900
#004D48
oklch(37.8% 0.066 187.3)
-
Step 950
950
#002E2A
oklch(27.1% 0.048 185.8)
#18E5D8 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) | #D8D8D8 | 0.151 |
| Deuteranopia (no green cones) | #BFC6DA | 0.142 |
| Tritanopia (no blue cones) | #00EBE1 | 0.017 |
| Achromatopsia (no color) | #CDCDCD | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18E5D8
#18E5D8
oklch(83.2% 0.142 187.5)
- #FFAEBC
#FFAEBC
oklch(83.2% 0.096 8)
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 #18E5D8, closest first.
No curated palette has a color within ΔE 0.04 of #18E5D8.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.016
- Aqua Marine #2EE8BB ΔE 0.044
- Aqua Blue #02D8E9 ΔE 0.050
- Medium Turquoise #48D1CC ΔE 0.053
- Bright Aqua #0BF9EA ΔE 0.054
- Bright Light Blue #26F7FD ΔE 0.063
- Dark Turquoise #00CED1 ΔE 0.064
- Seafoam Blue #78D1B6 ΔE 0.066
Use #18E5D8 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.