#00AAF9
Closest named color: Chefchaouen Blue (#4895EF). oklch(70.4% 0.162 240.1), rgb(0, 170, 249).
Aa
Black text reads best on this color (8.11:1).
About this color
#00AAF9 is a medium-light, vivid blue. In OKLCH its lightness is 70%, its chroma 0.162 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.056 away. Black text reads best on it, at 8.11:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 8.11:1 |
| White text | 2.58:1 |
Values
| HEX | #00AAF9 |
| RGB | rgb(0, 170, 249) |
| HSL | hsl(199, 100%, 49%) |
| OKLCH | oklch(70.4% 0.162 240.1) |
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 #00AAF9 | 2.58:1 | Fails | Lc -54.9 | Large or bold text, headings |
| Black text on #00AAF9 | 8.11:1 | AAA | Lc 54.2 | Large or bold text, headings |
| #00AAF9 text on white | 2.58:1 | Fails | Lc 49.8 | Large or bold text, headings |
| #00AAF9 text on black | 8.11:1 | AAA | Lc -52.1 | 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
#EEF7FE
oklch(97.1% 0.013 241)
-
Step 100
100
#D9EDFC
oklch(93.6% 0.029 240.2)
-
Step 200
200
#B8DFFB
oklch(88.5% 0.056 239.5)
-
Step 300
300
#82CAFB
oklch(81% 0.1 239.4)
-
Step 400
400 (this color)
#00AAF9
oklch(70.4% 0.162 240.1)
-
Step 500
500
#0092D7
oklch(63% 0.145 240.3)
-
Step 600
600
#007BB6
oklch(55.6% 0.128 240.2)
-
Step 700
700
#00679A
oklch(49.1% 0.113 240.5)
-
Step 800
800
#00547F
oklch(42.6% 0.099 240.7)
-
Step 900
900
#00466A
oklch(37.6% 0.086 240.1)
-
Step 950
950
#002A41
oklch(27.1% 0.061 239)
#00AAF9 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) | #84ACFC | 0.081 |
| Deuteranopia (no green cones) | #6598F8 | 0.062 |
| Tritanopia (no blue cones) | #00BEC6 | 0.107 |
| Achromatopsia (no color) | #A1A1A1 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00AAF9
#00AAF9
oklch(70.4% 0.162 240.1)
- #E6830F
#E6830F
oklch(70.3% 0.161 60.2)
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 #00AAF9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.056
- Deep Sky Blue #00BFFF ΔE 0.057
- Cornflower Blue #6495ED ΔE 0.066
- Dodger Blue #1E90FF ΔE 0.071
- Dark Sky Blue #448EE4 ΔE 0.075
- Turquoise Blue #06B1C4 ΔE 0.087
- Bright Sky Blue #02CCFE ΔE 0.093
- Soft Blue #6488EA ΔE 0.093
Use #00AAF9 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.