#18D6FF
Closest named color: Bright Sky Blue (#02CCFE). oklch(81% 0.143 218.7), rgb(24, 214, 255).
Aa
Black text reads best on this color (12.10:1).
About this color
#18D6FF is a light, vivid teal or cyan. In OKLCH its lightness is 81%, its chroma 0.143 and its hue 219°. Its hue sits on the cool side of the wheel. The nearest named color is Bright Sky Blue (#02CCFE), ΔE 0.028 away. Black text reads best on it, at 12.10:1.
| Hue family | Teals and cyans |
| Lightness | light (81%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Bright Sky Blue (#02CCFE) |
| Black text | 12.10:1 |
| White text | 1.73:1 |
Values
| HEX | #18D6FF |
| RGB | rgb(24, 214, 255) |
| HSL | hsl(191, 100%, 55%) |
| OKLCH | oklch(81% 0.143 218.7) |
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 #18D6FF | 1.73:1 | Fails | Lc -34.7 | Non-text elements, placeholder text |
| Black text on #18D6FF | 12.10:1 | AAA | Lc 73.0 | Content text, not long reading |
| #18D6FF text on white | 1.73:1 | Fails | Lc 30.9 | Non-text elements, placeholder text |
| #18D6FF text on black | 12.10:1 | AAA | Lc -71.9 | 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 300.
-
Step 50
50
#E8F9FE
oklch(97.1% 0.019 217.2)
-
Step 100
100
#CCF1FD
oklch(93.6% 0.042 219.4)
-
Step 200
200
#9CE6FD
oklch(88.4% 0.08 219.4)
-
Step 300
300 (this color)
#18D6FF
oklch(81% 0.143 218.7)
-
Step 400
400
#00B3D6
oklch(70.8% 0.128 218.5)
-
Step 500
500
#0099B8
oklch(63.1% 0.114 219)
-
Step 600
600
#00819B
oklch(55.7% 0.1 218.5)
-
Step 700
700
#006C82
oklch(49.1% 0.088 218.4)
-
Step 800
800
#00596B
oklch(42.8% 0.077 217.7)
-
Step 900
900
#004A5A
oklch(37.8% 0.068 218.5)
-
Step 950
950
#002C36
oklch(27% 0.048 217.4)
#18D6FF 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) | #BCD0FF | 0.120 |
| Deuteranopia (no green cones) | #A1BCFF | 0.108 |
| Tritanopia (no blue cones) | #00E4E3 | 0.064 |
| Achromatopsia (no color) | #C4C4C4 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18D6FF
#18D6FF
oklch(81% 0.143 218.7)
- #FFA88B
#FFA88B
oklch(81.1% 0.111 39.2)
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 #18D6FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Sky Blue #02CCFE ΔE 0.028
- Aqua Blue #02D8E9 ΔE 0.035
- Vivid Sky Blue #4CC9F0 ΔE 0.037
- Lightblue #7BC8F6 ΔE 0.057
- Sky #82CAFC ΔE 0.061
- Light Sky Blue #87CEFA ΔE 0.062
- Sky Blue #87CEEB ΔE 0.063
- Deep Sky Blue #00BFFF ΔE 0.065
Use #18D6FF 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.