#18BEC1
Closest named color: Topaz (#13BBAF). oklch(72.8% 0.121 196.9), rgb(24, 190, 193).
Aa
Black text reads best on this color (9.17:1).
About this color
#18BEC1 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 73%, its chroma 0.121 and its hue 197°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.026 away. Black text reads best on it, at 9.17:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.17:1 |
| White text | 2.28:1 |
Values
| HEX | #18BEC1 |
| RGB | rgb(24, 190, 193) |
| HSL | hsl(181, 78%, 43%) |
| OKLCH | oklch(72.8% 0.121 196.9) |
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 #18BEC1 | 2.28:1 | Fails | Lc -49.4 | Large or bold text, headings |
| Black text on #18BEC1 | 9.17:1 | AAA | Lc 59.4 | Large or bold text, headings |
| #18BEC1 text on white | 2.28:1 | Fails | Lc 44.6 | Non-text elements, placeholder text |
| #18BEC1 text on black | 9.17:1 | AAA | Lc -57.5 | 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
#DAEFEF
oklch(93.7% 0.022 196.8)
-
Step 200
200
#BAE2E2
oklch(88.4% 0.042 196.4)
-
Step 300
300
#84D0D1
oklch(80.9% 0.075 196.8)
-
Step 400
400 (this color)
#18BEC1
oklch(72.8% 0.121 196.9)
-
Step 500
500
#009DA0
oklch(63.1% 0.107 197.2)
-
Step 600
600
#008486
oklch(55.6% 0.095 196.7)
-
Step 700
700
#006F71
oklch(49.1% 0.084 197)
-
Step 800
800
#005B5D
oklch(42.7% 0.073 197.4)
-
Step 900
900
#004C4D
oklch(37.8% 0.064 196.3)
-
Step 950
950
#002D2E
oklch(27% 0.046 197.1)
#18BEC1 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) | #B0B4C1 | 0.125 |
| Deuteranopia (no green cones) | #9AA5C2 | 0.115 |
| Tritanopia (no blue cones) | #00C5BF | 0.021 |
| Achromatopsia (no color) | #ABABAB | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18BEC1
#18BEC1
oklch(72.8% 0.121 196.9)
- #E9868C
#E9868C
oklch(72.8% 0.121 16.6)
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 #18BEC1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.026
- Turquoise Blue #06B1C4 ΔE 0.040
- Light Sea Green #20B2AA ΔE 0.041
- Dark Turquoise #00CED1 ΔE 0.045
- Medium Turquoise #48D1CC ΔE 0.060
- Greeny Blue #42B395 ΔE 0.061
- Medium Aquamarine #66CDAA ΔE 0.075
- Vivid Sky Blue #4CC9F0 ΔE 0.076
Use #18BEC1 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.