#3FA5ED
Closest named color: Chefchaouen Blue (#4895EF). oklch(69.5% 0.141 243.5), rgb(63, 165, 237).
Aa
Black text reads best on this color (7.81:1).
About this color
#3FA5ED is a medium-light, vivid blue. In OKLCH its lightness is 70%, its chroma 0.141 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.044 away. Black text reads best on it, at 7.81:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.81:1 |
| White text | 2.68:1 |
Values
| HEX | #3FA5ED |
| RGB | rgb(63, 165, 237) |
| HSL | hsl(205, 83%, 59%) |
| OKLCH | oklch(69.5% 0.141 243.5) |
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 #3FA5ED | 2.68:1 | Fails | Lc -57.0 | Large or bold text, headings |
| Black text on #3FA5ED | 7.81:1 | AAA | Lc 52.2 | Large or bold text, headings |
| #3FA5ED text on white | 2.68:1 | Fails | Lc 51.8 | Large or bold text, headings |
| #3FA5ED text on black | 7.81:1 | AAA | Lc -50.1 | 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
#8FC8F6
oklch(81% 0.088 243.5)
-
Step 400
400 (this color)
#3FA5ED
oklch(69.5% 0.141 243.5)
-
Step 500
500
#0091DE
oklch(63.1% 0.153 243.2)
-
Step 600
600
#007ABC
oklch(55.7% 0.136 243.3)
-
Step 700
700
#00669F
oklch(49.1% 0.12 243.6)
-
Step 800
800
#005383
oklch(42.6% 0.105 243.8)
-
Step 900
900
#00456E
oklch(37.6% 0.092 243.7)
-
Step 950
950
#002944
oklch(27% 0.066 243.6)
#3FA5ED 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) | #84A7F0 | 0.064 |
| Deuteranopia (no green cones) | #6C96EC | 0.050 |
| Tritanopia (no blue cones) | #00B7BE | 0.100 |
| Achromatopsia (no color) | #9E9E9E | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FA5ED
#3FA5ED
oklch(69.5% 0.141 243.5)
- #D9872D
#D9872D
oklch(69.5% 0.141 63.3)
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 #3FA5ED, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.044
- Cornflower Blue #6495ED ΔE 0.048
- Dark Sky Blue #448EE4 ΔE 0.061
- Deep Sky Blue #00BFFF ΔE 0.069
- Dodger Blue #1E90FF ΔE 0.071
- Soft Blue #6488EA ΔE 0.078
- Turquoise Blue #06B1C4 ΔE 0.081
- Periwinkle Blue #8F99FB ΔE 0.086
Use #3FA5ED 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.