#00A3DB
Closest named color: Chefchaouen Blue (#4895EF). oklch(67.2% 0.137 232), rgb(0, 163, 219).
Aa
Black text reads best on this color (7.26:1).
About this color
#00A3DB is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.137 and its hue 232°. 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 7.26:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.26:1 |
| White text | 2.89:1 |
Values
| HEX | #00A3DB |
| RGB | rgb(0, 163, 219) |
| HSL | hsl(195, 100%, 43%) |
| OKLCH | oklch(67.2% 0.137 232) |
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 #00A3DB | 2.89:1 | Fails | Lc -59.8 | Large or bold text, headings |
| Black text on #00A3DB | 7.26:1 | AAA | Lc 49.5 | Large or bold text, headings |
| #00A3DB text on white | 2.89:1 | Fails | Lc 54.5 | Large or bold text, headings |
| #00A3DB text on black | 7.26:1 | AAA | Lc -47.3 | 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
#EEF7FC
oklch(97.1% 0.012 231.7)
-
Step 100
100
#DAEDF8
oklch(93.5% 0.025 233)
-
Step 200
200
#BBDFF4
oklch(88.4% 0.048 233.7)
-
Step 300
300
#86CBEF
oklch(80.9% 0.086 232)
-
Step 400
400 (this color)
#00A3DB
oklch(67.2% 0.137 232)
-
Step 500
500
#0096C9
oklch(63.2% 0.128 231.5)
-
Step 600
600
#007EAA
oklch(55.7% 0.113 231.8)
-
Step 700
700
#006A8F
oklch(49.2% 0.1 231.3)
-
Step 800
800
#005676
oklch(42.6% 0.087 232.3)
-
Step 900
900
#004863
oklch(37.7% 0.077 231.8)
-
Step 950
950
#002B3D
oklch(27.1% 0.055 231.9)
#00A3DB 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) | #87A1DE | 0.089 |
| Deuteranopia (no green cones) | #6D90DA | 0.074 |
| Tritanopia (no blue cones) | #00B2B6 | 0.080 |
| Achromatopsia (no color) | #989898 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00A3DB
#00A3DB
oklch(67.2% 0.137 232)
- #D77B3D
#D77B3D
oklch(67.3% 0.137 52.1)
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 #00A3DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.059
- Turquoise Blue #06B1C4 ΔE 0.060
- Dark Sky Blue #448EE4 ΔE 0.064
- Cornflower Blue #6495ED ΔE 0.071
- Water Blue #0E87CC ΔE 0.078
- Faded Blue #658CBB ΔE 0.079
- Dodger Blue #1E90FF ΔE 0.082
- Blue NCS #118AB2 ΔE 0.084
Use #00A3DB 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.