#685FCB
Closest named color: Dark Periwinkle (#665FD1). oklch(54.9% 0.162 283.5), rgb(104, 95, 203).
Aa
White text reads best on this color (5.13:1).
About this color
#685FCB is a medium-dark, vivid purple. In OKLCH its lightness is 55%, its chroma 0.162 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.010 away. White text reads best on it, at 5.13:1.
| Hue family | Purples |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.08:1 |
| White text | 5.13:1 |
Values
| HEX | #685FCB |
| RGB | rgb(104, 95, 203) |
| HSL | hsl(245, 51%, 58%) |
| OKLCH | oklch(54.9% 0.162 283.5) |
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 #685FCB | 5.13:1 | AA | Lc -80.5 | Fine for body text |
| Black text on #685FCB | 4.08:1 | AA large text | Lc 28.9 | Dividers and decoration only |
| #685FCB text on white | 5.13:1 | AA | Lc 75.1 | Fine for body text |
| #685FCB text on black | 4.08:1 | AA large text | Lc -26.6 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E7E8F8
oklch(93.5% 0.022 283.1)
-
Step 200
200
#D5D6F4
oklch(88.5% 0.041 284)
-
Step 300
300
#BABBEF
oklch(80.9% 0.073 283.8)
-
Step 400
400
#9796E7
oklch(70.6% 0.117 283.5)
-
Step 500
500
#7F7AE0
oklch(63.1% 0.15 283.4)
-
Step 600
600 (this color)
#685FCB
oklch(54.9% 0.162 283.5)
-
Step 700
700
#5850B2
oklch(49.2% 0.151 283)
-
Step 800
800
#484290
oklch(42.8% 0.125 283.3)
-
Step 900
900
#3C3873
oklch(37.6% 0.098 283.7)
-
Step 950
950
#232143
oklch(26.9% 0.062 284.1)
#685FCB 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) | #2671CF | 0.076 |
| Deuteranopia (no green cones) | #1E6AC9 | 0.078 |
| Tritanopia (no blue cones) | #44778C | 0.138 |
| Achromatopsia (no color) | #6D6D6D | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #685FCB
#685FCB
oklch(54.9% 0.162 283.5)
- #7E7400
#7E7400
oklch(55.1% 0.116 103.5)
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 #685FCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.010
- Slate Blue #6A5ACD ΔE 0.013
- Light Indigo #6D5ACF ΔE 0.015
- Iris #6258C4 ΔE 0.022
- Warm Blue #4B57DB ΔE 0.054
- Royal Blue #4169E1 ΔE 0.059
- Medium Slate Blue #7B68EE ΔE 0.064
- Purpley #8756E4 ΔE 0.065
Use #685FCB 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.