#643197
Closest named color: Rebecca Purple (#663399). oklch(43.4% 0.16 303.2), rgb(100, 49, 151).
Aa
White text reads best on this color (8.64:1).
About this color
#643197 is a dark, vivid purple. In OKLCH its lightness is 43%, its chroma 0.160 and its hue 303°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.007 away. White text reads best on it, at 8.64:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | vivid (0.160) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.42:1 |
| White text | 8.64:1 |
Values
| HEX | #643197 |
| RGB | rgb(100, 49, 151) |
| HSL | hsl(270, 51%, 39%) |
| OKLCH | oklch(43.4% 0.16 303.2) |
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 #643197 | 8.64:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #643197 | 2.42:1 | Fails | Lc 14.9 | Not readable |
| #643197 text on white | 8.64:1 | AAA | Lc 89.1 | Fine for body text |
| #643197 text on black | 2.42:1 | Fails | Lc -13.1 | Not readable |
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 800.
-
Step 50
50
#F7F4FD
oklch(97.2% 0.012 301.3)
-
Step 100
100
#EDE6F9
oklch(93.6% 0.026 302.6)
-
Step 200
200
#E0D1F6
oklch(88.4% 0.053 303.7)
-
Step 300
300
#CDB2F3
oklch(80.9% 0.094 303.4)
-
Step 400
400
#B487EC
oklch(70.7% 0.149 303.3)
-
Step 500
500
#A265E6
oklch(63.1% 0.191 303.2)
-
Step 600
600
#8E47D4
oklch(55.6% 0.208 303.3)
-
Step 700
700
#7937B8
oklch(49.1% 0.194 303.3)
-
Step 800
800 (this color)
#643197
oklch(43.4% 0.16 303.2)
-
Step 900
900
#502B77
oklch(37.7% 0.126 303.3)
-
Step 950
950
#2F1A45
oklch(26.9% 0.079 304.1)
#643197 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) | #004B9A | 0.123 |
| Deuteranopia (no green cones) | #094B95 | 0.122 |
| Tritanopia (no blue cones) | #5A4860 | 0.117 |
| Achromatopsia (no color) | #4C4C4C | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643197
#643197
oklch(43.4% 0.16 303.2)
- #465A00
#465A00
oklch(43.5% 0.107 123.3)
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 #643197, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.007
- Dark Slate Blue #483D8B ΔE 0.059
- Blueberry #464196 ΔE 0.061
- Grape #7209B7 ΔE 0.069
- Chrysanthemum #560BAD ΔE 0.069
- Bluey Purple #6241C7 ΔE 0.083
- Purple #800080 ΔE 0.084
- Blue With A Hint Of Purple #533CC6 ΔE 0.085
Use #643197 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.