#3684FD
Closest named color: Clear Blue (#247AFD). oklch(63% 0.196 259.2), rgb(54, 132, 253).
Aa
Black text reads best on this color (5.87:1).
About this color
#3684FD is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.196 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.029 away. Black text reads best on it, at 5.87:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.196) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.87:1 |
| White text | 3.57:1 |
Values
| HEX | #3684FD |
| RGB | rgb(54, 132, 253) |
| HSL | hsl(216, 98%, 60%) |
| OKLCH | oklch(63% 0.196 259.2) |
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 #3684FD | 3.57:1 | AA large text | Lc -68.3 | Content text, not long reading |
| Black text on #3684FD | 5.87:1 | AA | Lc 41.3 | Non-text elements, placeholder text |
| #3684FD text on white | 3.57:1 | AA large text | Lc 62.8 | Content text, not long reading |
| #3684FD text on black | 5.87:1 | AA | Lc -38.9 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C5DBFD
oklch(88.6% 0.053 259)
-
Step 300
300
#9CC2FF
oklch(80.9% 0.096 259.7)
-
Step 400
400
#64A0FF
oklch(70.8% 0.153 259.2)
-
Step 500
500 (this color)
#3684FD
oklch(63% 0.196 259.2)
-
Step 600
600
#086AEC
oklch(55.6% 0.212 259.1)
-
Step 700
700
#0058CB
oklch(49.1% 0.193 259.2)
-
Step 800
800
#0348A6
oklch(42.7% 0.164 259.2)
-
Step 900
900
#0F3E84
oklch(37.8% 0.128 259)
-
Step 950
950
#0B254D
oklch(27% 0.081 259)
#3684FD 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) | #3D91FF | 0.035 |
| Deuteranopia (no green cones) | #007FFB | 0.026 |
| Tritanopia (no blue cones) | #00A1B4 | 0.151 |
| Achromatopsia (no color) | #878787 | 0.196 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3684FD
#3684FD
oklch(63% 0.196 259.2)
- #B37E00
#B37E00
oklch(63% 0.131 79.1)
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 #3684FD, closest first.
No curated palette has a color within ΔE 0.04 of #3684FD.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.029
- Dodger Blue #1E90FF ΔE 0.030
- Dark Sky Blue #448EE4 ΔE 0.050
- Soft Blue #6488EA ΔE 0.052
- Cornflower #6A79F7 ΔE 0.052
- Chefchaouen Blue #4895EF ΔE 0.055
- Cerulean Blue #056EEE ΔE 0.067
- Cornflower Blue #6495ED ΔE 0.071
Use #3684FD 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.