#01A9EF
Closest named color: Chefchaouen Blue (#4895EF). oklch(69.6% 0.152 237.1), rgb(1, 169, 239).
Aa
Black text reads best on this color (7.92:1).
About this color
#01A9EF is a medium-light, vivid blue. In OKLCH its lightness is 70%, its chroma 0.152 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 7.92:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.92:1 |
| White text | 2.65:1 |
Values
| HEX | #01A9EF |
| RGB | rgb(1, 169, 239) |
| HSL | hsl(198, 99%, 47%) |
| OKLCH | oklch(69.6% 0.152 237.1) |
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 #01A9EF | 2.65:1 | Fails | Lc -56.0 | Large or bold text, headings |
| Black text on #01A9EF | 7.92:1 | AAA | Lc 53.1 | Large or bold text, headings |
| #01A9EF text on white | 2.65:1 | Fails | Lc 50.9 | Large or bold text, headings |
| #01A9EF text on black | 7.92:1 | AAA | Lc -51.0 | 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
#DAEDFA
oklch(93.6% 0.027 237.6)
-
Step 200
200
#B9DFF8
oklch(88.5% 0.053 237)
-
Step 300
300
#83CAF7
oklch(80.9% 0.096 237.4)
-
Step 400
400 (this color)
#01A9EF
oklch(69.6% 0.152 237.1)
-
Step 500
500
#0094D2
oklch(63.2% 0.138 237.1)
-
Step 600
600
#007CB1
oklch(55.6% 0.122 237.2)
-
Step 700
700
#006896
oklch(49.1% 0.108 237.6)
-
Step 800
800
#00557B
oklch(42.6% 0.093 237.2)
-
Step 900
900
#004768
oklch(37.7% 0.083 237.5)
-
Step 950
950
#002A3F
oklch(27% 0.059 236.5)
#01A9EF 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) | #87A9F2 | 0.085 |
| Deuteranopia (no green cones) | #6A97EE | 0.067 |
| Tritanopia (no blue cones) | #00BBC2 | 0.096 |
| Achromatopsia (no color) | #9F9F9F | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01A9EF
#01A9EF
oklch(69.6% 0.152 237.1)
- #E2812A
#E2812A
oklch(69.6% 0.152 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 #01A9EF, 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
- Turquoise Blue #06B1C4 ΔE 0.074
- Dodger Blue #1E90FF ΔE 0.075
- Soft Blue #6488EA ΔE 0.093
- Bright Sky Blue #02CCFE ΔE 0.095
Use #01A9EF 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.