#18BBC2
Closest named color: Topaz (#13BBAF). oklch(72.1% 0.119 199.7), rgb(24, 187, 194).
Aa
Black text reads best on this color (8.92:1).
About this color
#18BBC2 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.119 and its hue 200°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.029 away. Black text reads best on it, at 8.92:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 8.92:1 |
| White text | 2.35:1 |
Values
| HEX | #18BBC2 |
| RGB | rgb(24, 187, 194) |
| HSL | hsl(182, 78%, 43%) |
| OKLCH | oklch(72.1% 0.119 199.7) |
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 #18BBC2 | 2.35:1 | Fails | Lc -50.7 | Large or bold text, headings |
| Black text on #18BBC2 | 8.92:1 | AAA | Lc 58.1 | Large or bold text, headings |
| #18BBC2 text on white | 2.35:1 | Fails | Lc 45.8 | Large or bold text, headings |
| #18BBC2 text on black | 8.92:1 | AAA | Lc -56.2 | 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
#BAE2E4
oklch(88.5% 0.042 200.2)
-
Step 300
300
#85D0D3
oklch(81% 0.075 199)
-
Step 400
400 (this color)
#18BBC2
oklch(72.1% 0.119 199.7)
-
Step 500
500
#009DA3
oklch(63.2% 0.108 199.6)
-
Step 600
600
#008489
oklch(55.7% 0.095 199.5)
-
Step 700
700
#006F73
oklch(49.2% 0.084 199.2)
-
Step 800
800
#005B5E
oklch(42.8% 0.073 198.7)
-
Step 900
900
#004C4F
oklch(37.8% 0.064 199.4)
-
Step 950
950
#002D2F
oklch(27% 0.046 199.4)
#18BBC2 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) | #ACB2C3 | 0.121 |
| Deuteranopia (no green cones) | #97A2C3 | 0.114 |
| Tritanopia (no blue cones) | #00C2BD | 0.024 |
| Achromatopsia (no color) | #A9A9A9 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18BBC2
#18BBC2
oklch(72.1% 0.119 199.7)
- #E68586
#E68586
oklch(72.1% 0.119 19.8)
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 #18BBC2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.029
- Turquoise Blue #06B1C4 ΔE 0.031
- Light Sea Green #20B2AA ΔE 0.038
- Dark Turquoise #00CED1 ΔE 0.053
- Greeny Blue #42B395 ΔE 0.062
- Medium Turquoise #48D1CC ΔE 0.068
- Vivid Sky Blue #4CC9F0 ΔE 0.077
- Medium Aquamarine #66CDAA ΔE 0.083
Use #18BBC2 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.