#633775
Closest named color: Dark Slate Blue (#483D8B). oklch(41.8% 0.11 315.3), rgb(99, 55, 117).
Aa
White text reads best on this color (8.99:1).
About this color
#633775 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.110 and its hue 315°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.061 away. White text reads best on it, at 8.99:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.110) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.33:1 |
| White text | 8.99:1 |
Values
| HEX | #633775 |
| RGB | rgb(99, 55, 117) |
| HSL | hsl(283, 36%, 34%) |
| OKLCH | oklch(41.8% 0.11 315.3) |
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 #633775 | 8.99:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #633775 | 2.33:1 | Fails | Lc 13.6 | Not readable |
| #633775 text on white | 8.99:1 | AAA | Lc 90.4 | Preferred for body text |
| #633775 text on black | 2.33:1 | Fails | Lc -11.9 | 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
#F8F4F9
oklch(97.2% 0.008 319.4)
-
Step 100
100
#EFE6F3
oklch(93.6% 0.02 315.7)
-
Step 200
200
#E2D2EA
oklch(88.4% 0.037 314.6)
-
Step 300
300
#D1B5DE
oklch(81% 0.064 315.1)
-
Step 400
400
#B98DCD
oklch(70.8% 0.103 315)
-
Step 500
500
#A76FBF
oklch(63.1% 0.131 315.2)
-
Step 600
600
#9355AC
oklch(55.6% 0.144 315.5)
-
Step 700
700
#7D4593
oklch(49.1% 0.133 315.7)
-
Step 800
800 (this color)
#633775
oklch(41.8% 0.11 315.3)
-
Step 900
900
#533260
oklch(37.7% 0.085 315.9)
-
Step 950
950
#301E38
oklch(27% 0.053 314.9)
#633775 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) | #2A4677 | 0.096 |
| Deuteranopia (no green cones) | #374A73 | 0.086 |
| Tritanopia (no blue cones) | #624050 | 0.073 |
| Achromatopsia (no color) | #494949 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633775
#633775
oklch(41.8% 0.11 315.3)
- #2F5911
#2F5911
oklch(41.8% 0.11 135.4)
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 #633775, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.061
- Rebecca Purple #663399 ΔE 0.061
- Blueberry #464196 ΔE 0.075
- Twilight #4E518B ΔE 0.076
- Dusk #4E5481 ΔE 0.081
- Light Eggplant #894585 ΔE 0.087
- Brownish Purple #76424E ΔE 0.089
- Grape Purple #5D1451 ΔE 0.089
Use #633775 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.