#18CEFF
Closest named color: Bright Sky Blue (#02CCFE). oklch(79.2% 0.145 223.6), rgb(24, 206, 255).
Aa
Black text reads best on this color (11.31:1).
About this color
#18CEFF is a light, vivid teal or cyan. In OKLCH its lightness is 79%, its chroma 0.145 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Bright Sky Blue (#02CCFE), ΔE 0.007 away. Black text reads best on it, at 11.31:1.
| Hue family | Teals and cyans |
| Lightness | light (79%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Bright Sky Blue (#02CCFE) |
| Black text | 11.31:1 |
| White text | 1.85:1 |
Values
| HEX | #18CEFF |
| RGB | rgb(24, 206, 255) |
| HSL | hsl(193, 100%, 55%) |
| OKLCH | oklch(79.2% 0.145 223.6) |
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 #18CEFF | 1.85:1 | Fails | Lc -38.5 | Non-text elements, placeholder text |
| Black text on #18CEFF | 11.31:1 | AAA | Lc 69.5 | Content text, not long reading |
| #18CEFF text on white | 1.85:1 | Fails | Lc 34.4 | Non-text elements, placeholder text |
| #18CEFF text on black | 11.31:1 | AAA | Lc -68.2 | 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
#E9F9FF
oklch(97.2% 0.019 222.2)
-
Step 100
100
#CDF1FF
oklch(93.7% 0.042 223.3)
-
Step 200
200
#A0E5FF
oklch(88.5% 0.078 223.5)
-
Step 300
300 (this color)
#18CEFF
oklch(79.2% 0.145 223.6)
-
Step 400
400
#00B1DD
oklch(70.6% 0.133 223.9)
-
Step 500
500
#0098BE
oklch(63.1% 0.118 223.7)
-
Step 600
600
#0080A0
oklch(55.7% 0.104 223.4)
-
Step 700
700
#006B87
oklch(49% 0.092 224)
-
Step 800
800
#00586F
oklch(42.7% 0.08 223.4)
-
Step 900
900
#00495D
oklch(37.7% 0.071 223.8)
-
Step 950
950
#002B38
oklch(26.8% 0.05 223.6)
#18CEFF 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) | #B2C9FF | 0.112 |
| Deuteranopia (no green cones) | #96B6FE | 0.098 |
| Tritanopia (no blue cones) | #00DDDE | 0.073 |
| Achromatopsia (no color) | #BEBEBE | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18CEFF
#18CEFF
oklch(79.2% 0.145 223.6)
- #FF9F76
#FF9F76
oklch(79.1% 0.127 43.7)
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 #18CEFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Sky Blue #02CCFE ΔE 0.007
- Vivid Sky Blue #4CC9F0 ΔE 0.026
- Deep Sky Blue #00BFFF ΔE 0.043
- Aqua Blue #02D8E9 ΔE 0.048
- Lightblue #7BC8F6 ΔE 0.053
- Sky #82CAFC ΔE 0.059
- Light Sky Blue #87CEFA ΔE 0.064
- Sky Blue #87CEEB ΔE 0.067
Use #18CEFF 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.