#686DEE
Closest named color: Medium Slate Blue (#7B68EE). oklch(59.9% 0.19 277.3), rgb(104, 109, 238).
Aa
Black text reads best on this color (5.01:1).
About this color
#686DEE is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.190 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Slate Blue (#7B68EE), ΔE 0.028 away. Black text reads best on it, at 5.01:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.190) |
| Temperature | cool |
| Nearest name | Medium Slate Blue (#7B68EE) |
| Black text | 5.01:1 |
| White text | 4.19:1 |
Values
| HEX | #686DEE |
| RGB | rgb(104, 109, 238) |
| HSL | hsl(238, 80%, 67%) |
| OKLCH | oklch(59.9% 0.19 277.3) |
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 #686DEE | 4.19:1 | AA large text | Lc -74.1 | Content text, not long reading |
| Black text on #686DEE | 5.01:1 | AA | Lc 35.5 | Non-text elements, placeholder text |
| #686DEE text on white | 4.19:1 | AA large text | Lc 68.6 | Content text, not long reading |
| #686DEE text on black | 5.01:1 | AA | Lc -33.1 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E5E9FC
oklch(93.7% 0.026 276.4)
-
Step 200
200
#D0D7FC
oklch(88.6% 0.052 276.9)
-
Step 300
300
#B1BBFD
oklch(80.8% 0.094 277.4)
-
Step 400
400
#8B95FC
oklch(70.7% 0.15 277.6)
-
Step 500
500 (this color)
#686DEE
oklch(59.9% 0.19 277.3)
-
Step 600
600
#5C5CE8
oklch(55.7% 0.206 277.4)
-
Step 700
700
#4C4ACA
oklch(49.1% 0.193 277.3)
-
Step 800
800
#3E3EA3
oklch(42.7% 0.159 277.3)
-
Step 900
900
#343681
oklch(37.6% 0.124 277.5)
-
Step 950
950
#1E204C
oklch(26.9% 0.08 277.6)
#686DEE 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) | #1481F2 | 0.075 |
| Deuteranopia (no green cones) | #0076EB | 0.075 |
| Tritanopia (no blue cones) | #188BA3 | 0.167 |
| Achromatopsia (no color) | #7C7C7C | 0.191 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #686DEE
#686DEE
oklch(59.9% 0.19 277.3)
- #957F00
#957F00
oklch(59.9% 0.123 96.9)
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 #686DEE, closest first.
No curated palette has a color within ΔE 0.04 of #686DEE.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Slate Blue #7B68EE ΔE 0.028
- Cornflower #6A79F7 ΔE 0.031
- Royal Blue #4169E1 ΔE 0.053
- Dark Periwinkle #665FD1 ΔE 0.053
- Neon Blue #4361EE ΔE 0.057
- Light Indigo #6D5ACF ΔE 0.062
- Slate Blue #6A5ACD ΔE 0.064
- Purpley #8756E4 ΔE 0.066
Use #686DEE 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.