#684FCE
Closest named color: Slate Blue (#6A5ACD). oklch(52.4% 0.187 287.1), rgb(104, 79, 206).
Aa
White text reads best on this color (5.83:1).
About this color
#684FCE is a medium-dark, vivid purple. In OKLCH its lightness is 52%, its chroma 0.187 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Slate Blue (#6A5ACD), ΔE 0.026 away. White text reads best on it, at 5.83:1.
| Hue family | Purples |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.187) |
| Temperature | cool |
| Nearest name | Slate Blue (#6A5ACD) |
| Black text | 3.59:1 |
| White text | 5.83:1 |
Values
| HEX | #684FCE |
| RGB | rgb(104, 79, 206) |
| HSL | hsl(252, 56%, 56%) |
| OKLCH | oklch(52.4% 0.187 287.1) |
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 #684FCE | 5.83:1 | AA | Lc -84.0 | Fine for body text |
| Black text on #684FCE | 3.59:1 | AA large text | Lc 25.3 | Dividers and decoration only |
| #684FCE text on white | 5.83:1 | AA | Lc 78.8 | Fine for body text |
| #684FCE text on black | 3.59:1 | AA large text | Lc -23.0 | 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#E8E8FA
oklch(93.6% 0.024 285.9)
-
Step 200
200
#D6D5F7
oklch(88.4% 0.047 286.8)
-
Step 300
300
#BCB9F5
oklch(80.9% 0.084 286.6)
-
Step 400
400
#9C92F0
oklch(70.7% 0.135 287.3)
-
Step 500
500
#8574EB
oklch(63.1% 0.173 286.9)
-
Step 600
600 (this color)
#684FCE
oklch(52.4% 0.187 287.1)
-
Step 700
700
#5F48BC
oklch(49.1% 0.174 287.3)
-
Step 800
800
#4D3C98
oklch(42.7% 0.144 287.1)
-
Step 900
900
#403479
oklch(37.7% 0.113 287.7)
-
Step 950
950
#251F47
oklch(26.9% 0.072 287.4)
#684FCE 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) | #0068D2 | 0.099 |
| Deuteranopia (no green cones) | #0061CB | 0.097 |
| Tritanopia (no blue cones) | #446D87 | 0.155 |
| Achromatopsia (no color) | #656565 | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #684FCE
#684FCE
oklch(52.4% 0.187 287.1)
- #726E00
#726E00
oklch(52.5% 0.113 107.2)
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 #684FCE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Blue #6A5ACD ΔE 0.026
- Light Indigo #6D5ACF ΔE 0.027
- Iris #6258C4 ΔE 0.027
- Bluey Purple #6241C7 ΔE 0.034
- Dark Periwinkle #665FD1 ΔE 0.036
- Warm Blue #4B57DB ΔE 0.048
- Blue With A Hint Of Purple #533CC6 ΔE 0.057
- Blurple #5539CC ΔE 0.058
Use #684FCE 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.