#4FAAF9
Closest named color: Cornflower Blue (#6495ED). oklch(71.7% 0.145 247.6), rgb(79, 170, 249).
Aa
Black text reads best on this color (8.45:1).
About this color
#4FAAF9 is a medium-light, vivid blue. In OKLCH its lightness is 72%, its chroma 0.145 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.055 away. Black text reads best on it, at 8.45:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 8.45:1 |
| White text | 2.48:1 |
Values
| HEX | #4FAAF9 |
| RGB | rgb(79, 170, 249) |
| HSL | hsl(208, 93%, 64%) |
| OKLCH | oklch(71.7% 0.145 247.6) |
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 #4FAAF9 | 2.48:1 | Fails | Lc -53.6 | Large or bold text, headings |
| Black text on #4FAAF9 | 8.45:1 | AAA | Lc 55.5 | Large or bold text, headings |
| #4FAAF9 text on white | 2.48:1 | Fails | Lc 48.5 | Large or bold text, headings |
| #4FAAF9 text on black | 8.45:1 | AAA | Lc -53.5 | 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
#EFF6FD
oklch(97% 0.012 248)
-
Step 100
100
#DDECFB
oklch(93.6% 0.026 248.1)
-
Step 200
200
#C0DDF9
oklch(88.5% 0.05 247.5)
-
Step 300
300
#91C6F8
oklch(80.8% 0.09 247.5)
-
Step 400
400 (this color)
#4FAAF9
oklch(71.7% 0.145 247.6)
-
Step 500
500
#008EE9
oklch(63.1% 0.169 247.8)
-
Step 600
600
#0077C5
oklch(55.6% 0.149 247.9)
-
Step 700
700
#0064A6
oklch(49.1% 0.131 247.6)
-
Step 800
800
#005289
oklch(42.7% 0.113 247.3)
-
Step 900
900
#004474
oklch(37.7% 0.101 247.8)
-
Step 950
950
#002847
oklch(27% 0.072 247.4)
#4FAAF9 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) | #87ADFC | 0.056 |
| Deuteranopia (no green cones) | #6F9DF7 | 0.041 |
| Tritanopia (no blue cones) | #00BDC6 | 0.108 |
| Achromatopsia (no color) | #A4A4A4 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4FAAF9
#4FAAF9
oklch(71.7% 0.145 247.6)
- #DE9029
#DE9029
oklch(71.7% 0.144 67.9)
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 #4FAAF9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.055
- Deep Sky Blue #00BFFF ΔE 0.057
- Chefchaouen Blue #4895EF ΔE 0.057
- Carolina Blue #8AB8FE ΔE 0.072
- Periwinkle Blue #8F99FB ΔE 0.075
- Dark Sky Blue #448EE4 ΔE 0.079
- Dodger Blue #1E90FF ΔE 0.081
- Soft Blue #6488EA ΔE 0.087
Use #4FAAF9 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.