#686FC6
Closest named color: Dark Periwinkle (#665FD1). oklch(57.7% 0.133 277.9), rgb(104, 111, 198).
Aa
Black text reads best on this color (4.67:1).
About this color
#686FC6 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.133 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.046 away. Black text reads best on it, at 4.67:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.67:1 |
| White text | 4.48:1 |
Values
| HEX | #686FC6 |
| RGB | rgb(104, 111, 198) |
| HSL | hsl(236, 45%, 59%) |
| OKLCH | oklch(57.7% 0.133 277.9) |
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 #686FC6 | 4.48:1 | AA large text | Lc -76.5 | Fine for body text |
| Black text on #686FC6 | 4.67:1 | AA | Lc 33.1 | Non-text elements, placeholder text |
| #686FC6 text on white | 4.48:1 | AA large text | Lc 71.0 | Content text, not long reading |
| #686FC6 text on black | 4.67:1 | AA | Lc -30.7 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E7E9F6
oklch(93.6% 0.018 279.1)
-
Step 200
200
#D3D8EF
oklch(88.5% 0.032 276)
-
Step 300
300
#B7BEE8
oklch(81% 0.06 277.6)
-
Step 400
400
#929BDC
oklch(70.7% 0.096 277.6)
-
Step 500
500
#7981D2
oklch(63.2% 0.122 278)
-
Step 600
600 (this color)
#686FC6
oklch(57.7% 0.133 277.9)
-
Step 700
700
#5257A5
oklch(49.2% 0.123 278.1)
-
Step 800
800
#434786
oklch(42.7% 0.103 278.3)
-
Step 900
900
#383C6B
oklch(37.6% 0.08 278.1)
-
Step 950
950
#21243F
oklch(27.2% 0.05 277.7)
#686FC6 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) | #4C7BC9 | 0.042 |
| Deuteranopia (no green cones) | #4573C4 | 0.042 |
| Tritanopia (no blue cones) | #468191 | 0.116 |
| Achromatopsia (no color) | #777777 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #686FC6
#686FC6
oklch(57.7% 0.133 277.9)
- #8C7900
#8C7900
oklch(57.6% 0.119 98.2)
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 #686FC6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.046
- Slate Blue #6A5ACD ΔE 0.055
- Light Indigo #6D5ACF ΔE 0.055
- Windows Blue #3778BF ΔE 0.058
- Iris #6258C4 ΔE 0.060
- French Blue #436BAD ΔE 0.063
- Royal Blue #4169E1 ΔE 0.066
- Deep Lavender #8D5EB7 ΔE 0.069
Use #686FC6 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.