#684DB5
Closest named color: Iris (#6258C4). oklch(50.3% 0.158 291.7), rgb(104, 77, 181).
Aa
White text reads best on this color (6.33:1).
About this color
#684DB5 is a medium-dark, vivid purple. In OKLCH its lightness is 50%, its chroma 0.158 and its hue 292°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.034 away. White text reads best on it, at 6.33:1.
| Hue family | Purples |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.158) |
| Temperature | in between |
| Nearest name | Iris (#6258C4) |
| Black text | 3.31:1 |
| White text | 6.33:1 |
Values
| HEX | #684DB5 |
| RGB | rgb(104, 77, 181) |
| HSL | hsl(256, 41%, 51%) |
| OKLCH | oklch(50.3% 0.158 291.7) |
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 #684DB5 | 6.33:1 | AA | Lc -86.3 | Fine for body text |
| Black text on #684DB5 | 3.31:1 | AA large text | Lc 22.9 | Dividers and decoration only |
| #684DB5 text on white | 6.33:1 | AA | Lc 81.2 | Fine for body text |
| #684DB5 text on black | 3.31:1 | AA large text | Lc -20.7 | 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
#EAE8F8
oklch(93.7% 0.022 291.7)
-
Step 200
200
#D9D5F4
oklch(88.6% 0.042 291.4)
-
Step 300
300
#C1B8EF
oklch(80.9% 0.077 292.1)
-
Step 400
400
#A292E6
oklch(70.7% 0.121 291.7)
-
Step 500
500
#8C74DF
oklch(63% 0.157 291.6)
-
Step 600
600
#785ACD
oklch(55.6% 0.171 291.9)
-
Step 700
700 (this color)
#684DB5
oklch(50.3% 0.158 291.7)
-
Step 800
800
#523D8F
oklch(42.7% 0.13 291.7)
-
Step 900
900
#443572
oklch(37.7% 0.101 292.2)
-
Step 950
950
#271F43
oklch(26.9% 0.065 291.6)
#684DB5 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) | #0E61B8 | 0.099 |
| Deuteranopia (no green cones) | #185DB3 | 0.095 |
| Tritanopia (no blue cones) | #536479 | 0.129 |
| Achromatopsia (no color) | #606060 | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #684DB5
#684DB5
oklch(50.3% 0.158 291.7)
- #666900
#666900
oklch(50.1% 0.111 111.7)
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 #684DB5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.034
- Bluey Purple #6241C7 ΔE 0.041
- Slate Blue #6A5ACD ΔE 0.046
- Light Indigo #6D5ACF ΔE 0.050
- Dark Periwinkle #665FD1 ΔE 0.058
- Blue With A Hint Of Purple #533CC6 ΔE 0.061
- Blurple #5539CC ΔE 0.067
- Rebecca Purple #663399 ΔE 0.070
Use #684DB5 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.