#685CCB
Closest named color: Slate Blue (#6A5ACD). oklch(54.4% 0.166 284.3), rgb(104, 92, 203).
Aa
White text reads best on this color (5.27:1).
About this color
#685CCB is a medium-dark, vivid purple. In OKLCH its lightness is 54%, its chroma 0.166 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Slate Blue (#6A5ACD), ΔE 0.006 away. White text reads best on it, at 5.27:1.
| Hue family | Purples |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.166) |
| Temperature | cool |
| Nearest name | Slate Blue (#6A5ACD) |
| Black text | 3.98:1 |
| White text | 5.27:1 |
Values
| HEX | #685CCB |
| RGB | rgb(104, 92, 203) |
| HSL | hsl(246, 52%, 58%) |
| OKLCH | oklch(54.4% 0.166 284.3) |
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 #685CCB | 5.27:1 | AA | Lc -81.3 | Fine for body text |
| Black text on #685CCB | 3.98:1 | AA large text | Lc 28.2 | Dividers and decoration only |
| #685CCB text on white | 5.27:1 | AA | Lc 75.9 | Fine for body text |
| #685CCB text on black | 3.98:1 | AA large text | Lc -25.8 | 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
#E8E8F8
oklch(93.6% 0.022 286)
-
Step 200
200
#D5D6F4
oklch(88.5% 0.041 284)
-
Step 300
300
#BABBF0
oklch(81% 0.074 283.8)
-
Step 400
400
#9896E8
oklch(70.8% 0.119 284.1)
-
Step 500
500
#8179E1
oklch(63.1% 0.153 284.6)
-
Step 600
600 (this color)
#685CCB
oklch(54.4% 0.166 284.3)
-
Step 700
700
#5A4EB3
oklch(49% 0.154 284.6)
-
Step 800
800
#494191
oklch(42.7% 0.127 284.1)
-
Step 900
900
#3D3874
oklch(37.8% 0.1 284.3)
-
Step 950
950
#232144
oklch(27% 0.064 283.9)
#685CCB 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) | #1C6FCF | 0.083 |
| Deuteranopia (no green cones) | #1468C9 | 0.084 |
| Tritanopia (no blue cones) | #45758A | 0.142 |
| Achromatopsia (no color) | #6C6C6C | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #685CCB
#685CCB
oklch(54.4% 0.166 284.3)
- #7B7200
#7B7200
oklch(54.3% 0.115 104.1)
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 #685CCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Blue #6A5ACD ΔE 0.006
- Light Indigo #6D5ACF ΔE 0.011
- Dark Periwinkle #665FD1 ΔE 0.011
- Iris #6258C4 ΔE 0.017
- Warm Blue #4B57DB ΔE 0.051
- Bluey Purple #6241C7 ΔE 0.061
- Royal Blue #4169E1 ΔE 0.061
- Purpley #8756E4 ΔE 0.064
Use #685CCB 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.