#684BB1
Closest named color: Iris (#6258C4). oklch(49.7% 0.156 293), rgb(104, 75, 177).
Aa
White text reads best on this color (6.50:1).
About this color
#684BB1 is a medium-dark, vivid purple. In OKLCH its lightness is 50%, its chroma 0.156 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.041 away. White text reads best on it, at 6.50:1.
| Hue family | Purples |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.156) |
| Temperature | in between |
| Nearest name | Iris (#6258C4) |
| Black text | 3.22:1 |
| White text | 6.50:1 |
Values
| HEX | #684BB1 |
| RGB | rgb(104, 75, 177) |
| HSL | hsl(257, 40%, 49%) |
| OKLCH | oklch(49.7% 0.156 293) |
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 #684BB1 | 6.50:1 | AA | Lc -87.0 | Fine for body text |
| Black text on #684BB1 | 3.22:1 | AA large text | Lc 22.1 | Dividers and decoration only |
| #684BB1 text on white | 6.50:1 | AA | Lc 81.9 | Fine for body text |
| #684BB1 text on black | 3.22:1 | AA large text | Lc -20.0 | 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 700.
-
Step 50
50
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#EAE7F8
oklch(93.5% 0.023 294.1)
-
Step 200
200
#DAD5F3
oklch(88.6% 0.041 293.2)
-
Step 300
300
#C2B8EE
oklch(80.9% 0.076 293.1)
-
Step 400
400
#A492E5
oklch(70.8% 0.12 293)
-
Step 500
500
#8E74DD
oklch(63% 0.154 292.8)
-
Step 600
600
#795ACB
oklch(55.6% 0.168 292.7)
-
Step 700
700 (this color)
#684BB1
oklch(49.7% 0.156 293)
-
Step 800
800
#533D8E
oklch(42.7% 0.129 292.6)
-
Step 900
900
#453571
oklch(37.8% 0.1 293.3)
-
Step 950
950
#281F42
oklch(26.9% 0.064 293.5)
#684BB1 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) | #105FB4 | 0.100 |
| Deuteranopia (no green cones) | #1B5CAF | 0.096 |
| Tritanopia (no blue cones) | #556177 | 0.124 |
| Achromatopsia (no color) | #5E5E5E | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #684BB1
#684BB1
oklch(49.7% 0.156 293)
- #636800
#636800
oklch(49.6% 0.111 113)
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 #684BB1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.041
- Bluey Purple #6241C7 ΔE 0.044
- Slate Blue #6A5ACD ΔE 0.054
- Light Indigo #6D5ACF ΔE 0.057
- Blue With A Hint Of Purple #533CC6 ΔE 0.062
- Rebecca Purple #663399 ΔE 0.063
- Dark Periwinkle #665FD1 ΔE 0.065
- Blurple #5539CC ΔE 0.069
Use #684BB1 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.