#633383
Closest named color: Rebecca Purple (#663399). oklch(42.1% 0.134 309.5), rgb(99, 51, 131).
Aa
White text reads best on this color (9.00:1).
About this color
#633383 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.134 and its hue 310°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.036 away. White text reads best on it, at 9.00:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.134) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.33:1 |
| White text | 9.00:1 |
Values
| HEX | #633383 |
| RGB | rgb(99, 51, 131) |
| HSL | hsl(276, 44%, 36%) |
| OKLCH | oklch(42.1% 0.134 309.5) |
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 #633383 | 9.00:1 | AAA | Lc -94.7 | Preferred for body text |
| Black text on #633383 | 2.33:1 | Fails | Lc 13.7 | Not readable |
| #633383 text on white | 9.00:1 | AAA | Lc 90.3 | Preferred for body text |
| #633383 text on black | 2.33:1 | Fails | Lc -12.0 | 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
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#EEE6F6
oklch(93.6% 0.023 308.2)
-
Step 200
200
#E2D2EF
oklch(88.6% 0.043 310.1)
-
Step 300
300
#D0B3E7
oklch(80.9% 0.078 309.9)
-
Step 400
400
#B88ADB
oklch(70.7% 0.125 309.6)
-
Step 500
500
#A66AD1
oklch(63.1% 0.16 309.4)
-
Step 600
600
#914FBE
oklch(55.5% 0.173 309.3)
-
Step 700
700
#7C3FA4
oklch(49.1% 0.162 309.5)
-
Step 800
800 (this color)
#633383
oklch(42.1% 0.134 309.5)
-
Step 900
900
#522F6A
oklch(37.7% 0.103 309.7)
-
Step 950
950
#301C3E
oklch(27% 0.066 309.8)
#633383 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) | #154786 | 0.115 |
| Deuteranopia (no green cones) | #294A81 | 0.103 |
| Tritanopia (no blue cones) | #5F4256 | 0.093 |
| Achromatopsia (no color) | #494949 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633383
#633383
oklch(42.1% 0.134 309.5)
- #395800
#395800
oklch(42% 0.112 129.3)
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 #633383, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.036
- Dark Slate Blue #483D8B ΔE 0.054
- Blueberry #464196 ΔE 0.065
- Purple #800080 ΔE 0.080
- Twilight #4E518B ΔE 0.080
- Light Eggplant #894585 ΔE 0.090
- Dusk #4E5481 ΔE 0.091
- Dark Magenta #8B008B ΔE 0.094
Use #633383 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.