#01A3ED
Closest named color: Chefchaouen Blue (#4895EF). oklch(68.1% 0.155 239.5), rgb(1, 163, 237).
Aa
Black text reads best on this color (7.46:1).
About this color
#01A3ED is a medium-light, vivid blue. In OKLCH its lightness is 68%, its chroma 0.155 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.043 away. Black text reads best on it, at 7.46:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.46:1 |
| White text | 2.81:1 |
Values
| HEX | #01A3ED |
| RGB | rgb(1, 163, 237) |
| HSL | hsl(199, 99%, 47%) |
| OKLCH | oklch(68.1% 0.155 239.5) |
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 #01A3ED | 2.81:1 | Fails | Lc -58.6 | Large or bold text, headings |
| Black text on #01A3ED | 7.46:1 | AAA | Lc 50.7 | Large or bold text, headings |
| #01A3ED text on white | 2.81:1 | Fails | Lc 53.4 | Large or bold text, headings |
| #01A3ED text on black | 7.46:1 | AAA | Lc -48.5 | 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
#DAEDFB
oklch(93.6% 0.028 239.7)
-
Step 200
200
#BADFF9
oklch(88.6% 0.053 238.8)
-
Step 300
300
#85C9F9
oklch(80.8% 0.097 240.3)
-
Step 400
400 (this color)
#01A3ED
oklch(68.1% 0.155 239.5)
-
Step 500
500
#0093D6
oklch(63.1% 0.143 239.3)
-
Step 600
600
#007BB5
oklch(55.6% 0.127 239.8)
-
Step 700
700
#006899
oklch(49.2% 0.111 239.3)
-
Step 800
800
#00557E
oklch(42.8% 0.097 239.2)
-
Step 900
900
#00466A
oklch(37.6% 0.086 240.1)
-
Step 950
950
#002A41
oklch(27.1% 0.061 239)
#01A3ED 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) | #7FA4F0 | 0.079 |
| Deuteranopia (no green cones) | #6292EC | 0.061 |
| Tritanopia (no blue cones) | #00B6BD | 0.102 |
| Achromatopsia (no color) | #9A9A9A | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01A3ED
#01A3ED
oklch(68.1% 0.155 239.5)
- #DC7D17
#DC7D17
oklch(68% 0.154 59.4)
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 #01A3ED, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.043
- Dark Sky Blue #448EE4 ΔE 0.056
- Cornflower Blue #6495ED ΔE 0.058
- Dodger Blue #1E90FF ΔE 0.062
- Deep Sky Blue #00BFFF ΔE 0.077
- Soft Blue #6488EA ΔE 0.081
- Turquoise Blue #06B1C4 ΔE 0.082
- Water Blue #0E87CC ΔE 0.084
Use #01A3ED 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.