#18A9BA
Closest named color: Turquoise Blue (#06B1C4). oklch(67.4% 0.112 207.9), rgb(24, 169, 186).
Aa
Black text reads best on this color (7.42:1).
About this color
#18A9BA is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 67%, its chroma 0.112 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.024 away. Black text reads best on it, at 7.42:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 7.42:1 |
| White text | 2.82:1 |
Values
| HEX | #18A9BA |
| RGB | rgb(24, 169, 186) |
| HSL | hsl(186, 77%, 41%) |
| OKLCH | oklch(67.4% 0.112 207.9) |
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 #18A9BA | 2.82:1 | Fails | Lc -59.1 | Large or bold text, headings |
| Black text on #18A9BA | 7.42:1 | AAA | Lc 50.2 | Large or bold text, headings |
| #18A9BA text on white | 2.82:1 | Fails | Lc 53.8 | Large or bold text, headings |
| #18A9BA text on black | 7.42:1 | AAA | Lc -48.0 | 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
#EFF7F9
oklch(97.1% 0.009 214.3)
-
Step 100
100
#DBEEF1
oklch(93.6% 0.021 208.1)
-
Step 200
200
#BCE1E6
oklch(88.5% 0.039 206.5)
-
Step 300
300
#8ACED8
oklch(81% 0.07 207.5)
-
Step 400
400 (this color)
#18A9BA
oklch(67.4% 0.112 207.9)
-
Step 500
500
#009BAB
oklch(63% 0.108 207.7)
-
Step 600
600
#008290
oklch(55.5% 0.095 208)
-
Step 700
700
#006E79
oklch(49.2% 0.084 206.9)
-
Step 800
800
#005A64
oklch(42.8% 0.073 207.9)
-
Step 900
900
#004B53
oklch(37.7% 0.065 207)
-
Step 950
950
#002D32
oklch(27.1% 0.046 206.3)
#18A9BA 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) | #99A2BB | 0.108 |
| Deuteranopia (no green cones) | #8593BA | 0.099 |
| Tritanopia (no blue cones) | #00B1AE | 0.034 |
| Achromatopsia (no color) | #9A9A9A | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18A9BA
#18A9BA
oklch(67.4% 0.112 207.9)
- #D27A6F
#D27A6F
oklch(67.3% 0.112 28)
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 #18A9BA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.024
- Light Sea Green #20B2AA ΔE 0.041
- Cadet Blue #5F9EA0 ΔE 0.052
- Topaz #13BBAF ΔE 0.060
- Sea #3C9992 ΔE 0.063
- Persian Green #2A9D8F ΔE 0.064
- Greyblue #77A1B5 ΔE 0.066
- Dull Teal #5F9E8F ΔE 0.067
Use #18A9BA 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.