#633680
Closest named color: Rebecca Purple (#663399). oklch(42.4% 0.125 310.2), rgb(99, 54, 128).
Aa
White text reads best on this color (8.86:1).
About this color
#633680 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.125 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 0.042 away. White text reads best on it, at 8.86:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.125) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.36:1 |
| White text | 8.86:1 |
Values
| HEX | #633680 |
| RGB | rgb(99, 54, 128) |
| HSL | hsl(276, 41%, 36%) |
| OKLCH | oklch(42.4% 0.125 310.2) |
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 #633680 | 8.86:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #633680 | 2.36:1 | Fails | Lc 14.0 | Not readable |
| #633680 text on white | 8.86:1 | AAA | Lc 89.9 | Fine for body text |
| #633680 text on black | 2.36:1 | Fails | Lc -12.3 | 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
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#EEE6F5
oklch(93.6% 0.022 309.6)
-
Step 200
200
#E1D2EE
oklch(88.4% 0.041 309.4)
-
Step 300
300
#CFB4E4
oklch(80.9% 0.072 310.1)
-
Step 400
400
#B78BD7
oklch(70.6% 0.118 310.1)
-
Step 500
500
#A56CCC
oklch(63% 0.15 310.1)
-
Step 600
600
#9052B9
oklch(55.6% 0.163 309.9)
-
Step 700
700
#7B429F
oklch(49.1% 0.151 310.3)
-
Step 800
800 (this color)
#633680
oklch(42.4% 0.125 310.2)
-
Step 900
900
#513068
oklch(37.6% 0.099 309.7)
-
Step 950
950
#301D3D
oklch(27.1% 0.062 310.2)
#633680 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) | #1F4882 | 0.106 |
| Deuteranopia (no green cones) | #2F4B7E | 0.095 |
| Tritanopia (no blue cones) | #5F4355 | 0.088 |
| Achromatopsia (no color) | #4A4A4A | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633680
#633680
oklch(42.4% 0.125 310.2)
- #385A00
#385A00
oklch(42.5% 0.115 130.4)
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 #633680, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.042
- Dark Slate Blue #483D8B ΔE 0.053
- Blueberry #464196 ΔE 0.065
- Twilight #4E518B ΔE 0.074
- Dusk #4E5481 ΔE 0.084
- Purple #800080 ΔE 0.084
- Light Eggplant #894585 ΔE 0.086
- Dusty Grape #545775 ΔE 0.097
Use #633680 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.