#55AFF3
Closest named color: Deep Sky Blue (#00BFFF). oklch(72.8% 0.131 243.9), rgb(85, 175, 243).
Aa
Black text reads best on this color (8.81:1).
About this color
#55AFF3 is a medium-light, moderately saturated blue. In OKLCH its lightness is 73%, its chroma 0.131 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.047 away. Black text reads best on it, at 8.81:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 8.81:1 |
| White text | 2.38:1 |
Values
| HEX | #55AFF3 |
| RGB | rgb(85, 175, 243) |
| HSL | hsl(206, 87%, 64%) |
| OKLCH | oklch(72.8% 0.131 243.9) |
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 #55AFF3 | 2.38:1 | Fails | Lc -51.6 | Large or bold text, headings |
| Black text on #55AFF3 | 8.81:1 | AAA | Lc 57.3 | Large or bold text, headings |
| #55AFF3 text on white | 2.38:1 | Fails | Lc 46.7 | Large or bold text, headings |
| #55AFF3 text on black | 8.81:1 | AAA | Lc -55.4 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DDECF9
oklch(93.6% 0.024 244.1)
-
Step 200
200
#C0DDF6
oklch(88.4% 0.046 244.3)
-
Step 300
300
#93C7F2
oklch(80.9% 0.082 244)
-
Step 400
400 (this color)
#55AFF3
oklch(72.8% 0.131 243.9)
-
Step 500
500
#0091DF
oklch(63.2% 0.154 243.6)
-
Step 600
600
#0079BD
oklch(55.5% 0.138 244.2)
-
Step 700
700
#00669F
oklch(49.1% 0.12 243.6)
-
Step 800
800
#005384
oklch(42.6% 0.106 244.3)
-
Step 900
900
#00456F
oklch(37.6% 0.093 244.3)
-
Step 950
950
#002944
oklch(27% 0.066 243.6)
#55AFF3 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) | #91B0F6 | 0.061 |
| Deuteranopia (no green cones) | #7BA1F2 | 0.048 |
| Tritanopia (no blue cones) | #00C0C7 | 0.097 |
| Achromatopsia (no color) | #A8A8A8 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55AFF3
#55AFF3
oklch(72.8% 0.131 243.9)
- #E09444
#E09444
oklch(72.9% 0.132 64.3)
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 #55AFF3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.047
- Carolina Blue #8AB8FE ΔE 0.061
- Cornflower Blue #6495ED ΔE 0.068
- Chefchaouen Blue #4895EF ΔE 0.073
- Vivid Sky Blue #4CC9F0 ΔE 0.073
- Bright Sky Blue #02CCFE ΔE 0.077
- Lightblue #7BC8F6 ΔE 0.080
- Periwinkle Blue #8F99FB ΔE 0.081
Use #55AFF3 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.