[hot take] Make dark mode colours pop more (#2478)

This PR makes dark mode colours pop more.
It uses the light mode colours as a starting point, with a few tweaks.

We could tweak these more, and bikeshed these to death. The goal of this
PR is to get us into a *brighter* ballpark.

If you don't want to recreate the following examples, copy paste them
from
[staging.tldraw.com/r/palette](https://staging.tldraw.com/r/palette)


![image](https://github.com/tldraw/tldraw/assets/15892272/d8e1302e-5fd1-40f3-bbaf-b4a6bdd77741)


![image](https://github.com/tldraw/tldraw/assets/15892272/4895c06b-da61-445a-9041-bc80d6fc6d91)


![image](https://github.com/tldraw/tldraw/assets/15892272/d90474ea-9b71-4c33-b8c7-28562ff4ee32)


![image](https://github.com/tldraw/tldraw/assets/15892272/21077583-6135-4b67-8c4b-bb6ac037a02d)


![image](https://github.com/tldraw/tldraw/assets/15892272/c0ac91f7-2703-4df9-bf3b-1356b7000401)


### Change Type

- [x] `patch` — Bug fix


### Test Plan


- [ ] Unit Tests
- [ ] End to end tests

### Release Notes

- Tweaked dark mode colour styles to make them pop more.

---------

Co-authored-by: huppy-bot[bot] <128400622+huppy-bot[bot]@users.noreply.github.com>

packages/tlschema/src/styles/TLColorStyle.ts

@@ -174,7 +174,7 @@ export const DefaultColorThemePalette: {
 			},
 		},
 		blue: {
-			solid: '#4156be',
+			solid: '#4263eb',
 			semi: '#262d40',
 			pattern: '#3a4b9e',
 			highlight: {
@@ -183,7 +183,7 @@ export const DefaultColorThemePalette: {
 			},
 		},
 		green: {
-			solid: '#3b7b5e',
+			solid: '#099268',
 			semi: '#253231',
 			pattern: '#366a53',
 			highlight: {
@@ -192,7 +192,7 @@ export const DefaultColorThemePalette: {
 			},
 		},
 		grey: {
-			solid: '#93989f',
+			solid: '#9398b0',
 			semi: '#33373c',
 			pattern: '#7c8187',
 			highlight: {
@@ -201,7 +201,7 @@ export const DefaultColorThemePalette: {
 			},
 		},
 		'light-blue': {
-			solid: '#588fc9',
+			solid: '#4dabf7',
 			semi: '#2a3642',
 			pattern: '#4d7aa9',
 			highlight: {
@@ -210,7 +210,7 @@ export const DefaultColorThemePalette: {
 			},
 		},
 		'light-green': {
-			solid: '#599f57',
+			solid: '#40c057',
 			semi: '#2a3830',
 			pattern: '#4e874e',
 			highlight: {
@@ -219,7 +219,7 @@ export const DefaultColorThemePalette: {
 			},
 		},
 		'light-red': {
-			solid: '#c67877',
+			solid: '#ff8787',
 			semi: '#3b3235',
 			pattern: '#a56767',
 			highlight: {
@@ -228,7 +228,7 @@ export const DefaultColorThemePalette: {
 			},
 		},
 		'light-violet': {
-			solid: '#b583c9',
+			solid: '#e599f7',
 			semi: '#383442',
 			pattern: '#9770a9',
 			highlight: {
@@ -237,7 +237,7 @@ export const DefaultColorThemePalette: {
 			},
 		},
 		orange: {
-			solid: '#bf612e',
+			solid: '#f76707',
 			semi: '#3a2e2a',
 			pattern: '#9f552d',
 			highlight: {
@@ -246,7 +246,7 @@ export const DefaultColorThemePalette: {
 			},
 		},
 		red: {
-			solid: '#aa3c37',
+			solid: '#e03131',
 			semi: '#36292b',
 			pattern: '#8f3734',
 			highlight: {
@@ -255,7 +255,7 @@ export const DefaultColorThemePalette: {
 			},
 		},
 		violet: {
-			solid: '#873fa3',
+			solid: '#ae3ec9',
 			semi: '#31293c',
 			pattern: '#763a8b',
 			highlight: {
@@ -264,7 +264,7 @@ export const DefaultColorThemePalette: {
 			},
 		},
 		yellow: {
-			solid: '#cba371',
+			solid: '#ffc034',
 			semi: '#3c3934',
 			pattern: '#fecb92',
 			highlight: {