#633386
Closest named color: Rebecca Purple (#663399). oklch(42.3% 0.137 308.3), rgb(99, 51, 134).
Aa
White text reads best on this color (8.94:1).
About this color
#633386 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.137 and its hue 308°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.031 away. White text reads best on it, at 8.94:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.137) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.34:1 |
| White text | 8.94:1 |
Values
| HEX | #633386 |
| RGB | rgb(99, 51, 134) |
| HSL | hsl(275, 45%, 36%) |
| OKLCH | oklch(42.3% 0.137 308.3) |
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 #633386 | 8.94:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #633386 | 2.34:1 | Fails | Lc 13.9 | Not readable |
| #633386 text on white | 8.94:1 | AAA | Lc 90.1 | Preferred for body text |
| #633386 text on black | 2.34:1 | Fails | Lc -12.2 | 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
#E1D2F0
oklch(88.5% 0.044 307.9)
-
Step 300
300
#CFB3E9
oklch(80.9% 0.08 308.2)
-
Step 400
400
#B78ADE
oklch(70.8% 0.128 308)
-
Step 500
500
#A56AD4
oklch(63.1% 0.163 308.1)
-
Step 600
600
#914EC1
oklch(55.6% 0.178 308.6)
-
Step 700
700
#7B3EA7
oklch(49.1% 0.166 308.2)
-
Step 800
800 (this color)
#633386
oklch(42.3% 0.137 308.3)
-
Step 900
900
#522F6C
oklch(37.8% 0.106 308.7)
-
Step 950
950
#301C3F
oklch(27% 0.067 309)
#633386 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) | #104889 | 0.117 |
| Deuteranopia (no green cones) | #274A84 | 0.104 |
| Tritanopia (no blue cones) | #5E4357 | 0.097 |
| Achromatopsia (no color) | #494949 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633386
#633386
oklch(42.3% 0.137 308.3)
- #3B5900
#3B5900
oklch(42.4% 0.112 128.7)
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 #633386, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.031
- Dark Slate Blue #483D8B ΔE 0.053
- Blueberry #464196 ΔE 0.063
- Twilight #4E518B ΔE 0.080
- Purple #800080 ΔE 0.080
- Light Eggplant #894585 ΔE 0.091
- Chrysanthemum #560BAD ΔE 0.091
- Dusk #4E5481 ΔE 0.091
Use #633386 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.