#684CBA
Closest named color: Iris (#6258C4). oklch(50.5% 0.166 291), rgb(104, 76, 186).
Aa
White text reads best on this color (6.30:1).
About this color
#684CBA is a medium-dark, vivid purple. In OKLCH its lightness is 50%, its chroma 0.166 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.031 away. White text reads best on it, at 6.30:1.
| Hue family | Purples |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.166) |
| Temperature | in between |
| Nearest name | Iris (#6258C4) |
| Black text | 3.33:1 |
| White text | 6.30:1 |
Values
| HEX | #684CBA |
| RGB | rgb(104, 76, 186) |
| HSL | hsl(255, 44%, 51%) |
| OKLCH | oklch(50.5% 0.166 291) |
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 #684CBA | 6.30:1 | AA | Lc -86.2 | Fine for body text |
| Black text on #684CBA | 3.33:1 | AA large text | Lc 23.0 | Dividers and decoration only |
| #684CBA text on white | 6.30:1 | AA | Lc 81.0 | Fine for body text |
| #684CBA text on black | 3.33:1 | AA large text | Lc -20.8 | 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 700.
-
Step 50
50
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#E9E7F9
oklch(93.5% 0.024 291)
-
Step 200
200
#D9D5F5
oklch(88.6% 0.044 291.2)
-
Step 300
300
#C0B8F1
oklch(80.9% 0.08 290.9)
-
Step 400
400
#A191EA
oklch(70.6% 0.128 291)
-
Step 500
500
#8C73E4
oklch(63.1% 0.165 291.1)
-
Step 600
600
#7759D2
oklch(55.7% 0.179 290.9)
-
Step 700
700 (this color)
#684CBA
oklch(50.5% 0.166 291)
-
Step 800
800
#523C93
oklch(42.8% 0.137 291.1)
-
Step 900
900
#433475
oklch(37.7% 0.107 291)
-
Step 950
950
#271F45
oklch(27% 0.069 290.8)
#684CBA 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) | #0062BE | 0.103 |
| Deuteranopia (no green cones) | #045DB8 | 0.101 |
| Tritanopia (no blue cones) | #50657C | 0.135 |
| Achromatopsia (no color) | #606060 | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #684CBA
#684CBA
oklch(50.5% 0.166 291)
- #686A00
#686A00
oklch(50.6% 0.111 111.1)
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 #684CBA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.031
- Bluey Purple #6241C7 ΔE 0.034
- Slate Blue #6A5ACD ΔE 0.042
- Light Indigo #6D5ACF ΔE 0.045
- Dark Periwinkle #665FD1 ΔE 0.054
- Blue With A Hint Of Purple #533CC6 ΔE 0.056
- Blurple #5539CC ΔE 0.061
- Warm Blue #4B57DB ΔE 0.069
Use #684CBA 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.