#633F94
Closest named color: Rebecca Purple (#663399). oklch(45.1% 0.136 300.6), rgb(99, 63, 148).
Aa
White text reads best on this color (7.86:1).
About this color
#633F94 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 45%, its chroma 0.136 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 0.028 away. White text reads best on it, at 7.86:1.
| Hue family | Purples |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.136) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.66:1 |
| White text | 7.86:1 |
Values
| HEX | #633F94 |
| RGB | rgb(99, 63, 148) |
| HSL | hsl(265, 40%, 41%) |
| OKLCH | oklch(45.1% 0.136 300.6) |
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 #633F94 | 7.86:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #633F94 | 2.66:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #633F94 text on white | 7.86:1 | AAA | Lc 87.0 | Fine for body text |
| #633F94 text on black | 2.66:1 | Fails | Lc -15.1 | 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 800.
-
Step 50
50
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#ECE7F7
oklch(93.7% 0.022 300.2)
-
Step 200
200
#DDD3F2
oklch(88.4% 0.043 300.2)
-
Step 300
300
#C9B5ED
oklch(80.9% 0.081 301)
-
Step 400
400
#AE8DE3
oklch(70.7% 0.127 300.9)
-
Step 500
500
#9A6EDB
oklch(63% 0.162 300.5)
-
Step 600
600
#8653C8
oklch(55.5% 0.176 300.9)
-
Step 700
700
#7143AD
oklch(49% 0.163 300.5)
-
Step 800
800 (this color)
#633F94
oklch(45.1% 0.136 300.6)
-
Step 900
900
#4B3170
oklch(37.6% 0.106 300.4)
-
Step 950
950
#2C1D42
oklch(26.9% 0.068 300.6)
#633F94 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) | #1B5197 | 0.099 |
| Deuteranopia (no green cones) | #285192 | 0.091 |
| Tritanopia (no blue cones) | #595063 | 0.103 |
| Achromatopsia (no color) | #525252 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633F94
#633F94
oklch(45.1% 0.136 300.6)
- #4E5E00
#4E5E00
oklch(45.2% 0.108 120.5)
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 #633F94, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.028
- Blueberry #464196 ΔE 0.050
- Dark Slate Blue #483D8B ΔE 0.051
- Twilight #4E518B ΔE 0.059
- Dusk #4E5481 ΔE 0.075
- Light Eggplant #894585 ΔE 0.081
- Bluey Purple #6241C7 ΔE 0.081
- Blue With A Hint Of Purple #533CC6 ΔE 0.086
Use #633F94 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.