#633985
Closest named color: Rebecca Purple (#663399). oklch(43.2% 0.126 307.4), rgb(99, 57, 133).
Aa
White text reads best on this color (8.55:1).
About this color
#633985 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.126 and its hue 307°. 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 8.55:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.126) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.45:1 |
| White text | 8.55:1 |
Values
| HEX | #633985 |
| RGB | rgb(99, 57, 133) |
| HSL | hsl(273, 40%, 37%) |
| OKLCH | oklch(43.2% 0.126 307.4) |
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 #633985 | 8.55:1 | AAA | Lc -93.6 | Preferred for body text |
| Black text on #633985 | 2.45:1 | Fails | Lc 14.9 | Not readable |
| #633985 text on white | 8.55:1 | AAA | Lc 89.1 | Fine for body text |
| #633985 text on black | 2.45:1 | Fails | Lc -13.1 | 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
#EEE6F5
oklch(93.6% 0.022 309.6)
-
Step 200
200
#E0D2EF
oklch(88.4% 0.042 307.2)
-
Step 300
300
#CDB4E6
oklch(80.8% 0.074 307.4)
-
Step 400
400
#B48CDA
oklch(70.7% 0.119 307.1)
-
Step 500
500
#A26DCF
oklch(63% 0.151 307.6)
-
Step 600
600
#8D53BC
oklch(55.5% 0.164 307.4)
-
Step 700
700
#7843A2
oklch(49.1% 0.152 307.5)
-
Step 800
800 (this color)
#633985
oklch(43.2% 0.126 307.4)
-
Step 900
900
#503169
oklch(37.7% 0.098 307.9)
-
Step 950
950
#2F1D3E
oklch(27% 0.063 307.9)
#633985 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) | #1F4B88 | 0.103 |
| Deuteranopia (no green cones) | #2E4D83 | 0.093 |
| Tritanopia (no blue cones) | #5E4759 | 0.091 |
| Achromatopsia (no color) | #4C4C4C | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633985
#633985
oklch(43.2% 0.126 307.4)
- #3F5B00
#3F5B00
oklch(43.2% 0.112 127.4)
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 #633985, 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 0.050
- Blueberry #464196 ΔE 0.059
- Twilight #4E518B ΔE 0.068
- Dusk #4E5481 ΔE 0.078
- Light Eggplant #894585 ΔE 0.083
- Purple #800080 ΔE 0.089
- Dusty Grape #545775 ΔE 0.093
Use #633985 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.