#00A9E9
Closest named color: Chefchaouen Blue (#4895EF). oklch(69.3% 0.146 234.7), rgb(0, 169, 233).
Aa
Black text reads best on this color (7.85:1).
About this color
#00A9E9 is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.146 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.059 away. Black text reads best on it, at 7.85:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.85:1 |
| White text | 2.67:1 |
Values
| HEX | #00A9E9 |
| RGB | rgb(0, 169, 233) |
| HSL | hsl(196, 100%, 46%) |
| OKLCH | oklch(69.3% 0.146 234.7) |
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 #00A9E9 | 2.67:1 | Fails | Lc -56.4 | Large or bold text, headings |
| Black text on #00A9E9 | 7.85:1 | AAA | Lc 52.7 | Large or bold text, headings |
| #00A9E9 text on white | 2.67:1 | Fails | Lc 51.3 | Large or bold text, headings |
| #00A9E9 text on black | 7.85:1 | AAA | Lc -50.6 | 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
#EEF7FD
oklch(97.1% 0.013 236.6)
-
Step 100
100
#DAEDF9
oklch(93.6% 0.026 235.4)
-
Step 200
200
#B9DFF6
oklch(88.4% 0.051 234.7)
-
Step 300
300
#84CBF3
oklch(81% 0.091 234.2)
-
Step 400
400 (this color)
#00A9E9
oklch(69.3% 0.146 234.7)
-
Step 500
500
#0095CE
oklch(63.2% 0.133 234.7)
-
Step 600
600
#007DAD
oklch(55.6% 0.117 234.3)
-
Step 700
700
#006992
oklch(49.1% 0.103 234.3)
-
Step 800
800
#005679
oklch(42.8% 0.09 234.7)
-
Step 900
900
#004765
oklch(37.6% 0.08 234.9)
-
Step 950
950
#002A3E
oklch(26.9% 0.057 235.2)
#00A9E9 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) | #89A8EC | 0.088 |
| Deuteranopia (no green cones) | #6E96E8 | 0.072 |
| Tritanopia (no blue cones) | #00BABF | 0.090 |
| Achromatopsia (no color) | #9E9E9E | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00A9E9
#00A9E9
oklch(69.3% 0.146 234.7)
- #E08036
#E08036
oklch(69.3% 0.146 54.5)
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 #00A9E9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.059
- Deep Sky Blue #00BFFF ΔE 0.063
- Turquoise Blue #06B1C4 ΔE 0.066
- Cornflower Blue #6495ED ΔE 0.069
- Dark Sky Blue #448EE4 ΔE 0.072
- Dodger Blue #1E90FF ΔE 0.081
- Greyblue #77A1B5 ΔE 0.093
- Soft Blue #6488EA ΔE 0.096
Use #00A9E9 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.