#4FB3FD
Closest named color: Deep Sky Blue (#00BFFF). oklch(73.9% 0.142 243.9), rgb(79, 179, 253).
Aa
Black text reads best on this color (9.19:1).
About this color
#4FB3FD is a medium-light, vivid blue. In OKLCH its lightness is 74%, its chroma 0.142 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.037 away. Black text reads best on it, at 9.19:1.
| Hue family | Blues |
| Lightness | medium-light (74%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.19:1 |
| White text | 2.28:1 |
Values
| HEX | #4FB3FD |
| RGB | rgb(79, 179, 253) |
| HSL | hsl(206, 98%, 65%) |
| OKLCH | oklch(73.9% 0.142 243.9) |
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 #4FB3FD | 2.28:1 | Fails | Lc -49.5 | Large or bold text, headings |
| Black text on #4FB3FD | 9.19:1 | AAA | Lc 59.3 | Large or bold text, headings |
| #4FB3FD text on white | 2.28:1 | Fails | Lc 44.7 | Non-text elements, placeholder text |
| #4FB3FD text on black | 9.19:1 | AAA | Lc -57.4 | 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
#EFF7FD
oklch(97.2% 0.012 239.9)
-
Step 100
100
#DCECFA
oklch(93.5% 0.026 244.4)
-
Step 200
200
#BEDEF8
oklch(88.6% 0.049 242.8)
-
Step 300
300
#8FC7F6
oklch(80.8% 0.089 244.5)
-
Step 400
400 (this color)
#4FB3FD
oklch(73.9% 0.142 243.9)
-
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
#0066A0
oklch(49.2% 0.121 244)
-
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)
#4FB3FD 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) | #91B5FF | 0.064 |
| Deuteranopia (no green cones) | #79A4FC | 0.050 |
| Tritanopia (no blue cones) | #00C5CD | 0.102 |
| Achromatopsia (no color) | #ACACAC | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4FB3FD
#4FB3FD
oklch(73.9% 0.142 243.9)
- #E8953C
#E8953C
oklch(73.9% 0.142 63.8)
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 #4FB3FD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.037
- Carolina Blue #8AB8FE ΔE 0.058
- Vivid Sky Blue #4CC9F0 ΔE 0.068
- Bright Sky Blue #02CCFE ΔE 0.068
- Lightblue #7BC8F6 ΔE 0.075
- Cornflower Blue #6495ED ΔE 0.078
- Chefchaouen Blue #4895EF ΔE 0.081
- Sky #82CAFC ΔE 0.082
Use #4FB3FD 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.