#18BEEF
Closest named color: Deep Sky Blue (#00BFFF). oklch(74.7% 0.139 225.5), rgb(24, 190, 239).
Aa
Black text reads best on this color (9.65:1).
About this color
#18BEEF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 75%, its chroma 0.139 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.023 away. Black text reads best on it, at 9.65:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.65:1 |
| White text | 2.17:1 |
Values
| HEX | #18BEEF |
| RGB | rgb(24, 190, 239) |
| HSL | hsl(194, 87%, 52%) |
| OKLCH | oklch(74.7% 0.139 225.5) |
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 #18BEEF | 2.17:1 | Fails | Lc -46.9 | Large or bold text, headings |
| Black text on #18BEEF | 9.65:1 | AAA | Lc 61.7 | Content text, not long reading |
| #18BEEF text on white | 2.17:1 | Fails | Lc 42.2 | Non-text elements, placeholder text |
| #18BEEF text on black | 9.65:1 | AAA | Lc -60.0 | 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
#D9EEF7
oklch(93.6% 0.025 225.3)
-
Step 200
200
#B8E0F2
oklch(88.4% 0.049 227)
-
Step 300
300
#81CDEB
oklch(81% 0.086 225.1)
-
Step 400
400 (this color)
#18BEEF
oklch(74.7% 0.139 225.5)
-
Step 500
500
#0097C0
oklch(63% 0.12 225.7)
-
Step 600
600
#007FA2
oklch(55.5% 0.106 225.7)
-
Step 700
700
#006B89
oklch(49.1% 0.094 225.7)
-
Step 800
800
#005871
oklch(42.8% 0.081 225.4)
-
Step 900
900
#00495E
oklch(37.7% 0.071 225)
-
Step 950
950
#002B39
oklch(26.9% 0.051 225.5)
#18BEEF 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) | #A3BAF1 | 0.104 |
| Deuteranopia (no green cones) | #89A8EE | 0.090 |
| Tritanopia (no blue cones) | #00CCCE | 0.072 |
| Achromatopsia (no color) | #B0B0B0 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18BEEF
#18BEEF
oklch(74.7% 0.139 225.5)
- #F48F5E
#F48F5E
oklch(74.8% 0.138 45.8)
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 #18BEEF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.023
- Bright Sky Blue #02CCFE ΔE 0.039
- Vivid Sky Blue #4CC9F0 ΔE 0.040
- Turquoise Blue #06B1C4 ΔE 0.067
- Lightblue #7BC8F6 ΔE 0.069
- Dark Turquoise #00CED1 ΔE 0.072
- Aqua Blue #02D8E9 ΔE 0.076
- Sky #82CAFC ΔE 0.079
Use #18BEEF 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.