#633C8D
Closest named color: Rebecca Purple (#663399). oklch(44.2% 0.131 303.7), rgb(99, 60, 141).
Aa
White text reads best on this color (8.19:1).
About this color
#633C8D is a dark, moderately saturated purple. In OKLCH its lightness is 44%, its chroma 0.131 and its hue 304°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.029 away. White text reads best on it, at 8.19:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.131) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.56:1 |
| White text | 8.19:1 |
Values
| HEX | #633C8D |
| RGB | rgb(99, 60, 141) |
| HSL | hsl(269, 40%, 39%) |
| OKLCH | oklch(44.2% 0.131 303.7) |
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 #633C8D | 8.19:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #633C8D | 2.56:1 | Fails | Lc 16.0 | Dividers and decoration only |
| #633C8D text on white | 8.19:1 | AAA | Lc 88.0 | Fine for body text |
| #633C8D text on black | 2.56:1 | Fails | Lc -14.1 | 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
#EDE7F6
oklch(93.7% 0.021 304)
-
Step 200
200
#DFD3F1
oklch(88.6% 0.043 303.7)
-
Step 300
300
#CBB5EA
oklch(80.9% 0.077 303.6)
-
Step 400
400
#B18DDF
oklch(70.8% 0.122 303.6)
-
Step 500
500
#9E6ED6
oklch(63.1% 0.157 303.5)
-
Step 600
600
#8953C3
oklch(55.5% 0.171 303.6)
-
Step 700
700
#7543A8
oklch(49.1% 0.158 304)
-
Step 800
800 (this color)
#633C8D
oklch(44.2% 0.131 303.7)
-
Step 900
900
#4D316D
oklch(37.6% 0.102 303.4)
-
Step 950
950
#2D1D40
oklch(26.9% 0.065 303.4)
#633C8D 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) | #1D4E90 | 0.101 |
| Deuteranopia (no green cones) | #2B4F8B | 0.092 |
| Tritanopia (no blue cones) | #5B4C5E | 0.099 |
| Achromatopsia (no color) | #4F4F4F | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633C8D
#633C8D
oklch(44.2% 0.131 303.7)
- #475C00
#475C00
oklch(44.1% 0.109 123.6)
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 #633C8D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.029
- Dark Slate Blue #483D8B ΔE 0.048
- Blueberry #464196 ΔE 0.053
- Twilight #4E518B ΔE 0.062
- Dusk #4E5481 ΔE 0.076
- Light Eggplant #894585 ΔE 0.081
- Dusty Grape #545775 ΔE 0.092
- Bluey Purple #6241C7 ΔE 0.093
Use #633C8D 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.