#684ACC
Closest named color: Bluey Purple (#6241C7). oklch(51.5% 0.191 288.4), rgb(104, 74, 204).
Aa
White text reads best on this color (6.10:1).
About this color
#684ACC is a medium-dark, vivid purple. In OKLCH its lightness is 52%, its chroma 0.191 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Bluey Purple (#6241C7), ΔE 0.023 away. White text reads best on it, at 6.10:1.
| Hue family | Purples |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.191) |
| Temperature | cool |
| Nearest name | Bluey Purple (#6241C7) |
| Black text | 3.44:1 |
| White text | 6.10:1 |
Values
| HEX | #684ACC |
| RGB | rgb(104, 74, 204) |
| HSL | hsl(254, 56%, 55%) |
| OKLCH | oklch(51.5% 0.191 288.4) |
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 #684ACC | 6.10:1 | AA | Lc -85.2 | Fine for body text |
| Black text on #684ACC | 3.44:1 | AA large text | Lc 24.1 | Dividers and decoration only |
| #684ACC text on white | 6.10:1 | AA | Lc 80.0 | Fine for body text |
| #684ACC text on black | 3.44:1 | AA large text | Lc -21.9 | 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 700.
-
Step 50
50
#F5F4FE
oklch(97.1% 0.013 290.8)
-
Step 100
100
#E9E7FB
oklch(93.5% 0.027 290.5)
-
Step 200
200
#D7D4FA
oklch(88.4% 0.052 288.9)
-
Step 300
300
#BEB7F9
oklch(80.8% 0.093 289)
-
Step 400
400
#9E8FF7
oklch(70.7% 0.149 288.6)
-
Step 500
500
#886FF3
oklch(63% 0.19 288.4)
-
Step 600
600
#7453E1
oklch(55.6% 0.205 288.6)
-
Step 700
700 (this color)
#684ACC
oklch(51.5% 0.191 288.4)
-
Step 800
800
#4F389E
oklch(42.7% 0.158 288.2)
-
Step 900
900
#41327E
oklch(37.8% 0.123 288.1)
-
Step 950
950
#261E4A
oklch(27.1% 0.079 288.4)
#684ACC 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) | #0065D0 | 0.103 |
| Deuteranopia (no green cones) | #005FC9 | 0.101 |
| Tritanopia (no blue cones) | #466984 | 0.156 |
| Achromatopsia (no color) | #626262 | 0.192 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #684ACC
#684ACC
oklch(51.5% 0.191 288.4)
- #6E6C00
#6E6C00
oklch(51.6% 0.112 108.5)
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 #684ACC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluey Purple #6241C7 ΔE 0.023
- Iris #6258C4 ΔE 0.035
- Slate Blue #6A5ACD ΔE 0.036
- Light Indigo #6D5ACF ΔE 0.037
- Dark Periwinkle #665FD1 ΔE 0.047
- Blue With A Hint Of Purple #533CC6 ΔE 0.049
- Blurple #5539CC ΔE 0.050
- Warm Blue #4B57DB ΔE 0.053
Use #684ACC 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.