#18B6BF
Closest named color: Turquoise Blue (#06B1C4). oklch(70.8% 0.117 201.3), rgb(24, 182, 191).
Aa
Black text reads best on this color (8.48:1).
About this color
#18B6BF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 71%, its chroma 0.117 and its hue 201°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.019 away. Black text reads best on it, at 8.48:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.48:1 |
| White text | 2.47:1 |
Values
| HEX | #18B6BF |
| RGB | rgb(24, 182, 191) |
| HSL | hsl(183, 78%, 42%) |
| OKLCH | oklch(70.8% 0.117 201.3) |
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 #18B6BF | 2.47:1 | Fails | Lc -53.1 | Large or bold text, headings |
| Black text on #18B6BF | 8.48:1 | AAA | Lc 55.9 | Large or bold text, headings |
| #18B6BF text on white | 2.47:1 | Fails | Lc 48.1 | Large or bold text, headings |
| #18B6BF text on black | 8.48:1 | AAA | Lc -53.9 | Large or bold text, headings |
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 400.
-
Step 50
50
#EEF8F8
oklch(97.2% 0.011 197)
-
Step 100
100
#DAEEF0
oklch(93.5% 0.021 204)
-
Step 200
200
#BBE2E4
oklch(88.6% 0.041 200.3)
-
Step 300
300
#86CFD4
oklch(80.8% 0.073 201.3)
-
Step 400
400 (this color)
#18B6BF
oklch(70.8% 0.117 201.3)
-
Step 500
500
#009CA4
oklch(63% 0.107 201.2)
-
Step 600
600
#00838A
oklch(55.5% 0.094 201.4)
-
Step 700
700
#006E74
oklch(49% 0.083 201.4)
-
Step 800
800
#005A5F
oklch(42.5% 0.072 201.4)
-
Step 900
900
#004B50
oklch(37.6% 0.064 202.5)
-
Step 950
950
#002D30
oklch(27% 0.046 201.8)
#18B6BF 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) | #A7ADC0 | 0.118 |
| Deuteranopia (no green cones) | #929EC0 | 0.109 |
| Tritanopia (no blue cones) | #00BDB8 | 0.026 |
| Achromatopsia (no color) | #A5A5A5 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18B6BF
#18B6BF
oklch(70.8% 0.117 201.3)
- #E08280
#E08280
oklch(70.7% 0.116 21.7)
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 #18B6BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.019
- Light Sea Green #20B2AA ΔE 0.030
- Topaz #13BBAF ΔE 0.032
- Greeny Blue #42B395 ΔE 0.059
- Dark Turquoise #00CED1 ΔE 0.067
- Cadet Blue #5F9EA0 ΔE 0.072
- Greyblue #77A1B5 ΔE 0.077
- Medium Turquoise #48D1CC ΔE 0.082
Use #18B6BF 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.