#633798
Closest named color: Rebecca Purple (#663399). oklch(44.2% 0.153 301.2), rgb(99, 55, 152).
Aa
White text reads best on this color (8.29:1).
About this color
#633798 is a dark, vivid purple. In OKLCH its lightness is 44%, its chroma 0.153 and its hue 301°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.010 away. White text reads best on it, at 8.29:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | vivid (0.153) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.53:1 |
| White text | 8.29:1 |
Values
| HEX | #633798 |
| RGB | rgb(99, 55, 152) |
| HSL | hsl(267, 47%, 41%) |
| OKLCH | oklch(44.2% 0.153 301.2) |
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 #633798 | 8.29:1 | AAA | Lc -92.8 | Preferred for body text |
| Black text on #633798 | 2.53:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #633798 text on white | 8.29:1 | AAA | Lc 88.2 | Fine for body text |
| #633798 text on black | 2.53:1 | Fails | Lc -14.0 | 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
#F7F4FC
oklch(97.2% 0.011 303.1)
-
Step 100
100
#EDE6F9
oklch(93.6% 0.026 302.6)
-
Step 200
200
#DED2F5
oklch(88.4% 0.049 301)
-
Step 300
300
#CAB4F2
oklch(81% 0.089 300.7)
-
Step 400
400
#B08AEB
oklch(70.7% 0.142 300.9)
-
Step 500
500
#9E69E4
oklch(63.2% 0.182 301.3)
-
Step 600
600
#894CD2
oklch(55.5% 0.198 301.1)
-
Step 700
700
#753CB6
oklch(49.1% 0.184 301.3)
-
Step 800
800 (this color)
#633798
oklch(44.2% 0.153 301.2)
-
Step 900
900
#4D2E75
oklch(37.7% 0.118 301)
-
Step 950
950
#2D1C45
oklch(27.1% 0.075 300.6)
#633798 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) | #004E9B | 0.117 |
| Deuteranopia (no green cones) | #144E96 | 0.111 |
| Tritanopia (no blue cones) | #584C62 | 0.115 |
| Achromatopsia (no color) | #4E4E4E | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633798
#633798
oklch(44.2% 0.153 301.2)
- #4A5B00
#4A5B00
oklch(44.1% 0.106 121.4)
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 #633798, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.010
- Dark Slate Blue #483D8B ΔE 0.054
- Blueberry #464196 ΔE 0.054
- Grape #7209B7 ΔE 0.076
- Twilight #4E518B ΔE 0.076
- Chrysanthemum #560BAD ΔE 0.077
- Bluey Purple #6241C7 ΔE 0.077
- Blue With A Hint Of Purple #533CC6 ΔE 0.080
Use #633798 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.