#3683EF
Closest named color: Clear Blue (#247AFD). oklch(61.9% 0.179 257.7), rgb(54, 131, 239).
Aa
Black text reads best on this color (5.64:1).
About this color
#3683EF is a medium-dark, vivid blue. In OKLCH its lightness is 62%, its chroma 0.179 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.035 away. Black text reads best on it, at 5.64:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.179) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.64:1 |
| White text | 3.71:1 |
Values
| HEX | #3683EF |
| RGB | rgb(54, 131, 239) |
| HSL | hsl(215, 85%, 57%) |
| OKLCH | oklch(61.9% 0.179 257.7) |
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 #3683EF | 3.71:1 | AA large text | Lc -69.8 | Content text, not long reading |
| Black text on #3683EF | 5.64:1 | AA | Lc 39.8 | Non-text elements, placeholder text |
| #3683EF text on white | 3.71:1 | AA large text | Lc 64.3 | Content text, not long reading |
| #3683EF text on black | 5.64:1 | AA | Lc -37.4 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C6DBFA
oklch(88.6% 0.048 258)
-
Step 300
300
#9DC3F9
oklch(80.9% 0.087 257.2)
-
Step 400
400
#66A1F7
oklch(70.6% 0.141 257.8)
-
Step 500
500 (this color)
#3683EF
oklch(61.9% 0.179 257.7)
-
Step 600
600
#0F6DE2
oklch(55.5% 0.195 257.8)
-
Step 700
700
#005BC3
oklch(49.1% 0.179 257.6)
-
Step 800
800
#074B9F
oklch(42.8% 0.15 257.7)
-
Step 900
900
#123F7E
oklch(37.6% 0.117 258)
-
Step 950
950
#0C264A
oklch(27.1% 0.074 257.4)
#3683EF 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) | #4A8DF3 | 0.033 |
| Deuteranopia (no green cones) | #1D7DED | 0.023 |
| Tritanopia (no blue cones) | #009DAD | 0.139 |
| Achromatopsia (no color) | #848484 | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3683EF
#3683EF
oklch(61.9% 0.179 257.7)
- #B07A00
#B07A00
oklch(61.9% 0.129 77.7)
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 #3683EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.035
- Dodger Blue #1E90FF ΔE 0.038
- Dark Sky Blue #448EE4 ΔE 0.039
- Soft Blue #6488EA ΔE 0.047
- Chefchaouen Blue #4895EF ΔE 0.052
- Cornflower #6A79F7 ΔE 0.055
- Water Blue #0E87CC ΔE 0.060
- Cerulean Blue #056EEE ΔE 0.062
Use #3683EF 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.