#18C2EC
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(75.5% 0.136 221.4), rgb(24, 194, 236).
Aa
Black text reads best on this color (9.96:1).
About this color
#18C2EC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 76%, its chroma 0.136 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.031 away. Black text reads best on it, at 9.96:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 9.96:1 |
| White text | 2.10:1 |
Values
| HEX | #18C2EC |
| RGB | rgb(24, 194, 236) |
| HSL | hsl(192, 85%, 51%) |
| OKLCH | oklch(75.5% 0.136 221.4) |
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 #18C2EC | 2.10:1 | Fails | Lc -45.3 | Large or bold text, headings |
| Black text on #18C2EC | 9.96:1 | AAA | Lc 63.3 | Content text, not long reading |
| #18C2EC text on white | 2.10:1 | Fails | Lc 40.7 | Non-text elements, placeholder text |
| #18C2EC text on black | 9.96:1 | AAA | Lc -61.6 | Content text, not long reading |
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
#EEF7FB
oklch(97.1% 0.011 226)
-
Step 100
100
#D9EEF6
oklch(93.6% 0.025 222.6)
-
Step 200
200
#B8E1EF
oklch(88.5% 0.047 220.6)
-
Step 300
300
#80CEE7
oklch(81% 0.084 220.4)
-
Step 400
400 (this color)
#18C2EC
oklch(75.5% 0.136 221.4)
-
Step 500
500
#0098BB
oklch(63% 0.116 221.8)
-
Step 600
600
#00809D
oklch(55.6% 0.102 221.1)
-
Step 700
700
#006C85
oklch(49.2% 0.09 221.2)
-
Step 800
800
#00586D
oklch(42.6% 0.078 221.3)
-
Step 900
900
#00495C
oklch(37.6% 0.07 222.6)
-
Step 950
950
#002C38
oklch(27.2% 0.05 221.4)
#18C2EC 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) | #A9BDEE | 0.110 |
| Deuteranopia (no green cones) | #8FABEC | 0.096 |
| Tritanopia (no blue cones) | #00CFD0 | 0.063 |
| Achromatopsia (no color) | #B3B3B3 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18C2EC
#18C2EC
oklch(75.5% 0.136 221.4)
- #F79069
#F79069
oklch(75.5% 0.136 41.3)
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 #18C2EC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.031
- Deep Sky Blue #00BFFF ΔE 0.031
- Bright Sky Blue #02CCFE ΔE 0.033
- Dark Turquoise #00CED1 ΔE 0.060
- Aqua Blue #02D8E9 ΔE 0.063
- Lightblue #7BC8F6 ΔE 0.065
- Turquoise Blue #06B1C4 ΔE 0.068
- Medium Turquoise #48D1CC ΔE 0.075
Use #18C2EC 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.