#00A9F0
Closest named color: Chefchaouen Blue (#4895EF). oklch(69.7% 0.153 237.5), rgb(0, 169, 240).
Aa
Black text reads best on this color (7.93:1).
About this color
#00A9F0 is a medium-light, vivid blue. In OKLCH its lightness is 70%, its chroma 0.153 and its hue 237°. 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 7.93:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.153) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.93:1 |
| White text | 2.64:1 |
Values
| HEX | #00A9F0 |
| RGB | rgb(0, 169, 240) |
| HSL | hsl(198, 100%, 47%) |
| OKLCH | oklch(69.7% 0.153 237.5) |
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 #00A9F0 | 2.64:1 | Fails | Lc -56.0 | Large or bold text, headings |
| Black text on #00A9F0 | 7.93:1 | AAA | Lc 53.2 | Large or bold text, headings |
| #00A9F0 text on white | 2.64:1 | Fails | Lc 50.8 | Large or bold text, headings |
| #00A9F0 text on black | 7.93:1 | AAA | Lc -51.1 | 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
#EEF7FD
oklch(97.1% 0.013 236.6)
-
Step 100
100
#D9EDFB
oklch(93.6% 0.028 238.2)
-
Step 200
200
#B9DFF9
oklch(88.5% 0.054 238.1)
-
Step 300
300
#83CAF7
oklch(80.9% 0.096 237.4)
-
Step 400
400 (this color)
#00A9F0
oklch(69.7% 0.153 237.5)
-
Step 500
500
#0094D2
oklch(63.2% 0.138 237.1)
-
Step 600
600
#007CB2
oklch(55.6% 0.123 237.7)
-
Step 700
700
#006896
oklch(49.1% 0.108 237.6)
-
Step 800
800
#00557C
oklch(42.7% 0.094 237.9)
-
Step 900
900
#004768
oklch(37.7% 0.083 237.5)
-
Step 950
950
#002A40
oklch(27% 0.06 237.8)
#00A9F0 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) | #86A9F3 | 0.084 |
| Deuteranopia (no green cones) | #6A97EF | 0.067 |
| Tritanopia (no blue cones) | #00BBC2 | 0.097 |
| Achromatopsia (no color) | #9F9F9F | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00A9F0
#00A9F0
oklch(69.7% 0.153 237.5)
- #E38128
#E38128
oklch(69.7% 0.154 57.1)
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 #00A9F0, 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 0.061
- Cornflower Blue #6495ED ΔE 0.066
- Dark Sky Blue #448EE4 ΔE 0.071
- Dodger Blue #1E90FF ΔE 0.075
- Turquoise Blue #06B1C4 ΔE 0.076
- Soft Blue #6488EA ΔE 0.093
- Bright Sky Blue #02CCFE ΔE 0.095
Use #00A9F0 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.