#686CE6
Closest named color: Medium Slate Blue (#7B68EE). oklch(59.2% 0.181 277.9), rgb(104, 108, 230).
Aa
Black text reads best on this color (4.87:1).
About this color
#686CE6 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.181 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Slate Blue (#7B68EE), ΔE 0.031 away. Black text reads best on it, at 4.87:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.181) |
| Temperature | cool |
| Nearest name | Medium Slate Blue (#7B68EE) |
| Black text | 4.87:1 |
| White text | 4.30:1 |
Values
| HEX | #686CE6 |
| RGB | rgb(104, 108, 230) |
| HSL | hsl(238, 72%, 65%) |
| OKLCH | oklch(59.2% 0.181 277.9) |
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 #686CE6 | 4.30:1 | AA large text | Lc -75.0 | Content text, not long reading |
| Black text on #686CE6 | 4.87:1 | AA | Lc 34.6 | Non-text elements, placeholder text |
| #686CE6 text on white | 4.30:1 | AA large text | Lc 69.5 | Content text, not long reading |
| #686CE6 text on black | 4.87:1 | AA | Lc -32.2 | 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 600.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E6E9FA
oklch(93.7% 0.023 277.9)
-
Step 200
200
#D1D7F8
oklch(88.5% 0.046 277.3)
-
Step 300
300
#B4BCF5
oklch(80.9% 0.081 278.2)
-
Step 400
400
#8E97F1
oklch(70.7% 0.131 278.1)
-
Step 500
500
#747BEB
oklch(63.1% 0.166 277.8)
-
Step 600
600 (this color)
#686CE6
oklch(59.2% 0.181 277.9)
-
Step 700
700
#4E4FBD
oklch(49% 0.169 277.8)
-
Step 800
800
#404299
oklch(42.8% 0.139 277.8)
-
Step 900
900
#36397A
oklch(37.9% 0.108 277.9)
-
Step 950
950
#1F2247
oklch(27.1% 0.068 277.3)
#686CE6 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) | #237FEA | 0.071 |
| Deuteranopia (no green cones) | #0075E3 | 0.076 |
| Tritanopia (no blue cones) | #28889F | 0.157 |
| Achromatopsia (no color) | #7A7A7A | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #686CE6
#686CE6
oklch(59.2% 0.181 277.9)
- #917D00
#917D00
oklch(59% 0.122 97.9)
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 #686CE6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Slate Blue #7B68EE ΔE 0.031
- Cornflower #6A79F7 ΔE 0.039
- Dark Periwinkle #665FD1 ΔE 0.043
- Royal Blue #4169E1 ΔE 0.049
- Light Indigo #6D5ACF ΔE 0.052
- Slate Blue #6A5ACD ΔE 0.054
- Neon Blue #4361EE ΔE 0.057
- Purpley #8756E4 ΔE 0.064
Use #686CE6 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.