#00A1E9
Closest named color: Chefchaouen Blue (#4895EF). oklch(67.5% 0.152 239), rgb(0, 161, 233).
Aa
Black text reads best on this color (7.27:1).
About this color
#00A1E9 is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.152 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.042 away. Black text reads best on it, at 7.27:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.27:1 |
| White text | 2.88:1 |
Values
| HEX | #00A1E9 |
| RGB | rgb(0, 161, 233) |
| HSL | hsl(199, 100%, 46%) |
| OKLCH | oklch(67.5% 0.152 239) |
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 #00A1E9 | 2.88:1 | Fails | Lc -59.7 | Large or bold text, headings |
| Black text on #00A1E9 | 7.27:1 | AAA | Lc 49.6 | Large or bold text, headings |
| #00A1E9 text on white | 2.88:1 | Fails | Lc 54.4 | Large or bold text, headings |
| #00A1E9 text on black | 7.27:1 | AAA | Lc -47.4 | 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
#85CAF8
oklch(81% 0.095 238.7)
-
Step 400
400 (this color)
#00A1E9
oklch(67.5% 0.152 239)
-
Step 500
500
#0093D5
oklch(63.1% 0.142 238.9)
-
Step 600
600
#007BB4
oklch(55.5% 0.126 239.3)
-
Step 700
700
#006898
oklch(49.2% 0.11 238.7)
-
Step 800
800
#00557D
oklch(42.7% 0.096 238.5)
-
Step 900
900
#004769
oklch(37.8% 0.084 238.3)
-
Step 950
950
#002A41
oklch(27.1% 0.061 239)
#00A1E9 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) | #7EA2EC | 0.079 |
| Deuteranopia (no green cones) | #6290E8 | 0.062 |
| Tritanopia (no blue cones) | #00B3BB | 0.097 |
| Achromatopsia (no color) | #989898 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00A1E9
#00A1E9
oklch(67.5% 0.152 239)
- #D97C1A
#D97C1A
oklch(67.5% 0.152 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 #00A1E9, closest first.
No curated palette has a color within ΔE 0.04 of #00A1E9.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.042
- Dark Sky Blue #448EE4 ΔE 0.052
- Cornflower Blue #6495ED ΔE 0.058
- Dodger Blue #1E90FF ΔE 0.061
- Water Blue #0E87CC ΔE 0.077
- Soft Blue #6488EA ΔE 0.079
- Turquoise Blue #06B1C4 ΔE 0.081
- Deep Sky Blue #00BFFF ΔE 0.083
Use #00A1E9 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.