#684ECB
Closest named color: Iris (#6258C4). oklch(52% 0.185 287.8), rgb(104, 78, 203).
Aa
White text reads best on this color (5.93:1).
About this color
#684ECB is a medium-dark, vivid purple. In OKLCH its lightness is 52%, its chroma 0.185 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.026 away. White text reads best on it, at 5.93:1.
| Hue family | Purples |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.185) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.54:1 |
| White text | 5.93:1 |
Values
| HEX | #684ECB |
| RGB | rgb(104, 78, 203) |
| HSL | hsl(252, 55%, 55%) |
| OKLCH | oklch(52% 0.185 287.8) |
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 #684ECB | 5.93:1 | AA | Lc -84.4 | Fine for body text |
| Black text on #684ECB | 3.54:1 | AA large text | Lc 24.8 | Dividers and decoration only |
| #684ECB text on white | 5.93:1 | AA | Lc 79.2 | Fine for body text |
| #684ECB text on black | 3.54:1 | AA large text | Lc -22.6 | 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 700.
-
Step 50
50
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#E8E8FB
oklch(93.7% 0.026 285.9)
-
Step 200
200
#D7D5F9
oklch(88.6% 0.049 287.9)
-
Step 300
300
#BDB8F8
oklch(80.9% 0.09 287.8)
-
Step 400
400
#9D90F4
oklch(70.6% 0.144 288.1)
-
Step 500
500
#8771F0
oklch(63.1% 0.183 287.9)
-
Step 600
600
#7256DE
oklch(55.6% 0.198 287.6)
-
Step 700
700 (this color)
#684ECB
oklch(52% 0.185 287.8)
-
Step 800
800
#4E399C
oklch(42.6% 0.154 287.8)
-
Step 900
900
#40337C
oklch(37.7% 0.119 287.5)
-
Step 950
950
#251E49
oklch(26.9% 0.077 287.5)
#684ECB 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) | #0067CF | 0.100 |
| Deuteranopia (no green cones) | #0061C8 | 0.098 |
| Tritanopia (no blue cones) | #466B85 | 0.152 |
| Achromatopsia (no color) | #646464 | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #684ECB
#684ECB
oklch(52% 0.185 287.8)
- #706D00
#706D00
oklch(52% 0.112 107.8)
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 #684ECB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.026
- Slate Blue #6A5ACD ΔE 0.028
- Light Indigo #6D5ACF ΔE 0.030
- Bluey Purple #6241C7 ΔE 0.031
- Dark Periwinkle #665FD1 ΔE 0.039
- Warm Blue #4B57DB ΔE 0.050
- Blue With A Hint Of Purple #533CC6 ΔE 0.055
- Blurple #5539CC ΔE 0.056
Use #684ECB 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.