#6563C5
Closest named color: Dark Periwinkle (#665FD1). oklch(55% 0.148 281.3), rgb(101, 99, 197).
Aa
White text reads best on this color (5.06:1).
About this color
#6563C5 is a medium-dark, vivid purple. In OKLCH its lightness is 55%, its chroma 0.148 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.022 away. White text reads best on it, at 5.06:1.
| Hue family | Purples |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.148) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.14:1 |
| White text | 5.06:1 |
Values
| HEX | #6563C5 |
| RGB | rgb(101, 99, 197) |
| HSL | hsl(241, 46%, 58%) |
| OKLCH | oklch(55% 0.148 281.3) |
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 #6563C5 | 5.06:1 | AA | Lc -80.2 | Fine for body text |
| Black text on #6563C5 | 4.14:1 | AA large text | Lc 29.3 | Dividers and decoration only |
| #6563C5 text on white | 5.06:1 | AA | Lc 74.8 | Content text, not long reading |
| #6563C5 text on black | 4.14:1 | AA large text | Lc -26.9 | 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 600.
-
Step 50
50
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E7E9F7
oklch(93.7% 0.019 279.5)
-
Step 200
200
#D4D7F2
oklch(88.5% 0.037 280.6)
-
Step 300
300
#B8BCEC
oklch(80.8% 0.068 281)
-
Step 400
400
#9598E2
oklch(70.6% 0.108 281.5)
-
Step 500
500
#7C7DD9
oklch(63% 0.136 281.3)
-
Step 600
600 (this color)
#6563C5
oklch(55% 0.148 281.3)
-
Step 700
700
#5553AC
oklch(49.1% 0.138 281)
-
Step 800
800
#46448B
oklch(42.6% 0.115 281.6)
-
Step 900
900
#3A3A6F
oklch(37.6% 0.089 281.2)
-
Step 950
950
#222241
oklch(26.9% 0.057 281.9)
#6563C5 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) | #3672C9 | 0.060 |
| Deuteranopia (no green cones) | #2F6BC3 | 0.062 |
| Tritanopia (no blue cones) | #42788B | 0.127 |
| Achromatopsia (no color) | #6E6E6E | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6563C5
#6563C5
oklch(55% 0.148 281.3)
- #807300
#807300
oklch(55% 0.115 101.5)
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 #6563C5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.022
- Slate Blue #6A5ACD ΔE 0.027
- Iris #6258C4 ΔE 0.028
- Light Indigo #6D5ACF ΔE 0.029
- Royal Blue #4169E1 ΔE 0.060
- Warm Blue #4B57DB ΔE 0.061
- French Blue #436BAD ΔE 0.063
- Deep Lavender #8D5EB7 ΔE 0.067
Use #6563C5 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.