#73B9DF
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(75.4% 0.089 233.4), rgb(115, 185, 223).
Aa
Black text reads best on this color (9.73:1).
About this color
#73B9DF is a medium-light, moderately saturated blue. In OKLCH its lightness is 75%, its chroma 0.089 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.047 away. Black text reads best on it, at 9.73:1.
| Hue family | Blues |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 9.73:1 |
| White text | 2.15:1 |
Values
| HEX | #73B9DF |
| RGB | rgb(115, 185, 223) |
| HSL | hsl(201, 63%, 66%) |
| OKLCH | oklch(75.4% 0.089 233.4) |
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 #73B9DF | 2.15:1 | Fails | Lc -47.0 | Large or bold text, headings |
| Black text on #73B9DF | 9.73:1 | AAA | Lc 61.7 | Content text, not long reading |
| #73B9DF text on white | 2.15:1 | Fails | Lc 42.3 | Non-text elements, placeholder text |
| #73B9DF text on black | 9.73:1 | AAA | Lc -60.0 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C6DDEB
oklch(88.5% 0.031 234.5)
-
Step 300
300
#9EC7DF
oklch(80.8% 0.055 234)
-
Step 400
400 (this color)
#73B9DF
oklch(75.4% 0.089 233.4)
-
Step 500
500
#3094C3
oklch(63% 0.114 233.5)
-
Step 600
600
#007DAC
oklch(55.5% 0.116 233.8)
-
Step 700
700
#006991
oklch(49% 0.102 233.6)
-
Step 800
800
#005678
oklch(42.7% 0.089 233.9)
-
Step 900
900
#084763
oklch(37.6% 0.075 234.5)
-
Step 950
950
#092A3A
oklch(27% 0.048 233.8)
#73B9DF 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) | #A7B7E1 | 0.059 |
| Deuteranopia (no green cones) | #98ABDE | 0.052 |
| Tritanopia (no blue cones) | #3DC3C5 | 0.068 |
| Achromatopsia (no color) | #B0B0B0 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #73B9DF
#73B9DF
oklch(75.4% 0.089 233.4)
- #DCA079
#DCA079
oklch(75.4% 0.089 54)
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 #73B9DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.047
- Lightblue #7BC8F6 ΔE 0.048
- Light Cornflower Blue #98C1D9 ΔE 0.049
- Light Grey Blue #9DBCD4 ΔE 0.050
- Carolina Blue #8AB8FE ΔE 0.055
- Sky #82CAFC ΔE 0.059
- Sky Blue #87CEEB ΔE 0.063
- Deep Sky Blue #00BFFF ΔE 0.064
Use #73B9DF 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.