#18DFF5
Closest named color: Aqua Blue (#02D8E9). oklch(82.7% 0.14 207.7), rgb(24, 223, 245).
Aa
Black text reads best on this color (12.91:1).
About this color
#18DFF5 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 83%, its chroma 0.140 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Blue (#02D8E9), ΔE 0.023 away. Black text reads best on it, at 12.91:1.
| Hue family | Teals and cyans |
| Lightness | light (83%) |
| Chroma | moderately saturated (0.140) |
| Temperature | cool |
| Nearest name | Aqua Blue (#02D8E9) |
| Black text | 12.91:1 |
| White text | 1.62:1 |
Values
| HEX | #18DFF5 |
| RGB | rgb(24, 223, 245) |
| HSL | hsl(186, 92%, 53%) |
| OKLCH | oklch(82.7% 0.14 207.7) |
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 #18DFF5 | 1.62:1 | Fails | Lc -30.9 | Non-text elements, placeholder text |
| Black text on #18DFF5 | 12.91:1 | AAA | Lc 76.4 | Fine for body text |
| #18DFF5 text on white | 1.62:1 | Fails | Lc 27.3 | Dividers and decoration only |
| #18DFF5 text on black | 12.91:1 | AAA | Lc -75.6 | Fine for body text |
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
#E8F9FC
oklch(97% 0.018 209.4)
-
Step 100
100
#CCF2F8
oklch(93.6% 0.04 208.1)
-
Step 200
200
#9BE8F4
oklch(88.5% 0.077 208.2)
-
Step 300
300 (this color)
#18DFF5
oklch(82.7% 0.14 207.7)
-
Step 400
400
#00B5C7
oklch(70.7% 0.121 207.4)
-
Step 500
500
#009BAB
oklch(63% 0.108 207.7)
-
Step 600
600
#008290
oklch(55.5% 0.095 208)
-
Step 700
700
#006E79
oklch(49.2% 0.084 206.9)
-
Step 800
800
#005A64
oklch(42.8% 0.073 207.9)
-
Step 900
900
#004B53
oklch(37.7% 0.065 207)
-
Step 950
950
#002D32
oklch(27.1% 0.046 206.3)
#18DFF5 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) | #CAD6F6 | 0.134 |
| Deuteranopia (no green cones) | #AFC2F5 | 0.123 |
| Tritanopia (no blue cones) | #00EAE6 | 0.043 |
| Achromatopsia (no color) | #CBCBCB | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18DFF5
#18DFF5
oklch(82.7% 0.14 207.7)
- #FFAFA4
#FFAFA4
oklch(82.8% 0.096 28)
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 #18DFF5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Blue #02D8E9 ΔE 0.023
- Turquoise #40E0D0 ΔE 0.054
- Robin's Egg #6DEDFD ΔE 0.058
- Bright Sky Blue #02CCFE ΔE 0.059
- Medium Turquoise #48D1CC ΔE 0.059
- Vivid Sky Blue #4CC9F0 ΔE 0.059
- Dark Turquoise #00CED1 ΔE 0.062
- Bright Light Blue #26F7FD ΔE 0.066
Use #18DFF5 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.