#18BBE2
Closest named color: Deep Sky Blue (#00BFFF). oklch(73.4% 0.131 220.5), rgb(24, 187, 226).
Aa
Black text reads best on this color (9.24:1).
About this color
#18BBE2 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 73%, its chroma 0.131 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.041 away. Black text reads best on it, at 9.24:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.24:1 |
| White text | 2.27:1 |
Values
| HEX | #18BBE2 |
| RGB | rgb(24, 187, 226) |
| HSL | hsl(192, 81%, 49%) |
| OKLCH | oklch(73.4% 0.131 220.5) |
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 #18BBE2 | 2.27:1 | Fails | Lc -49.0 | Large or bold text, headings |
| Black text on #18BBE2 | 9.24:1 | AAA | Lc 59.8 | Large or bold text, headings |
| #18BBE2 text on white | 2.27:1 | Fails | Lc 44.2 | Non-text elements, placeholder text |
| #18BBE2 text on black | 9.24:1 | AAA | Lc -57.9 | 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
#EEF7FB
oklch(97.1% 0.011 226)
-
Step 100
100
#DAEEF5
oklch(93.6% 0.023 220.7)
-
Step 200
200
#B9E1EE
oklch(88.5% 0.045 219.5)
-
Step 300
300
#82CDE6
oklch(80.8% 0.082 221.2)
-
Step 400
400 (this color)
#18BBE2
oklch(73.4% 0.131 220.5)
-
Step 500
500
#0099BA
oklch(63.2% 0.115 220.3)
-
Step 600
600
#00809D
oklch(55.6% 0.102 221.1)
-
Step 700
700
#006C84
oklch(49.2% 0.09 220.2)
-
Step 800
800
#00586D
oklch(42.6% 0.078 221.3)
-
Step 900
900
#004A5B
oklch(37.8% 0.069 219.8)
-
Step 950
950
#002C37
oklch(27.1% 0.049 219.4)
#18BBE2 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) | #A3B6E4 | 0.107 |
| Deuteranopia (no green cones) | #8BA4E2 | 0.096 |
| Tritanopia (no blue cones) | #00C7C8 | 0.059 |
| Achromatopsia (no color) | #ACACAC | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18BBE2
#18BBE2
oklch(73.4% 0.131 220.5)
- #EE8B67
#EE8B67
oklch(73.5% 0.131 40.6)
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 #18BBE2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.041
- Turquoise Blue #06B1C4 ΔE 0.048
- Vivid Sky Blue #4CC9F0 ΔE 0.049
- Bright Sky Blue #02CCFE ΔE 0.054
- Dark Turquoise #00CED1 ΔE 0.066
- Topaz #13BBAF ΔE 0.077
- Lightblue #7BC8F6 ΔE 0.079
- Aqua Blue #02D8E9 ΔE 0.080
Use #18BBE2 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.