#686CBC
Closest named color: Dark Periwinkle (#665FD1). oklch(56.5% 0.122 279.5), rgb(104, 108, 188).
Aa
White text reads best on this color (4.70:1).
About this color
#686CBC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.122 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.050 away. White text reads best on it, at 4.70:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.45:1 |
| White text | 4.70:1 |
Values
| HEX | #686CBC |
| RGB | rgb(104, 108, 188) |
| HSL | hsl(237, 39%, 57%) |
| OKLCH | oklch(56.5% 0.122 279.5) |
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 #686CBC | 4.70:1 | AA | Lc -78.0 | Fine for body text |
| Black text on #686CBC | 4.45:1 | AA large text | Lc 31.5 | Non-text elements, placeholder text |
| #686CBC text on white | 4.70:1 | AA | Lc 72.6 | Content text, not long reading |
| #686CBC text on black | 4.45:1 | AA large text | Lc -29.1 | Dividers and decoration only |
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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7E9F5
oklch(93.6% 0.016 278.5)
-
Step 200
200
#D4D7EE
oklch(88.4% 0.032 279.8)
-
Step 300
300
#B9BDE4
oklch(80.8% 0.055 280.5)
-
Step 400
400
#959BD7
oklch(70.7% 0.088 279.5)
-
Step 500
500
#7C81CC
oklch(63.1% 0.112 279.7)
-
Step 600
600 (this color)
#686CBC
oklch(56.5% 0.122 279.5)
-
Step 700
700
#5557A0
oklch(49.1% 0.115 280.1)
-
Step 800
800
#454881
oklch(42.7% 0.094 279.4)
-
Step 900
900
#3A3D68
oklch(37.8% 0.073 279.3)
-
Step 950
950
#22243D
oklch(27.1% 0.046 279.3)
#686CBC 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) | #4E77BF | 0.040 |
| Deuteranopia (no green cones) | #4870BA | 0.040 |
| Tritanopia (no blue cones) | #4C7C8B | 0.106 |
| Achromatopsia (no color) | #737373 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #686CBC
#686CBC
oklch(56.5% 0.122 279.5)
- #877600
#877600
oklch(56.4% 0.117 99.2)
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 #686CBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.050
- French Blue #436BAD ΔE 0.054
- Slate Blue #6A5ACD ΔE 0.055
- Iris #6258C4 ΔE 0.056
- Light Indigo #6D5ACF ΔE 0.057
- Windows Blue #3778BF ΔE 0.058
- Deep Lavender #8D5EB7 ΔE 0.064
- Flat Blue #3C73A8 ΔE 0.065
Use #686CBC 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.