#633670
Closest named color: Dark Slate Blue (#483D8B). oklch(41.4% 0.106 318.3), rgb(99, 54, 112).
Aa
White text reads best on this color (9.16:1).
About this color
#633670 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.106 and its hue 318°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.067 away. White text reads best on it, at 9.16:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.106) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.29:1 |
| White text | 9.16:1 |
Values
| HEX | #633670 |
| RGB | rgb(99, 54, 112) |
| HSL | hsl(287, 35%, 33%) |
| OKLCH | oklch(41.4% 0.106 318.3) |
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 #633670 | 9.16:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #633670 | 2.29:1 | Fails | Lc 13.1 | Not readable |
| #633670 text on white | 9.16:1 | AAA | Lc 90.8 | Preferred for body text |
| #633670 text on black | 2.29:1 | Fails | Lc -11.5 | 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
#EFE6F2
oklch(93.5% 0.019 317.7)
-
Step 200
200
#E3D2E8
oklch(88.4% 0.035 318.5)
-
Step 300
300
#D2B4DB
oklch(80.8% 0.063 318.3)
-
Step 400
400
#BB8DC9
oklch(70.8% 0.099 318.2)
-
Step 500
500
#A96FBB
oklch(63.1% 0.127 317.9)
-
Step 600
600
#9456A7
oklch(55.6% 0.138 317.9)
-
Step 700
700
#7E468F
oklch(49.1% 0.127 317.9)
-
Step 800
800 (this color)
#633670
oklch(41.4% 0.106 318.3)
-
Step 900
900
#54325E
oklch(37.8% 0.083 318.3)
-
Step 950
950
#311E37
oklch(27.1% 0.052 317.8)
#633670 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) | #2B4572 | 0.096 |
| Deuteranopia (no green cones) | #39496E | 0.084 |
| Tritanopia (no blue cones) | #633E4E | 0.067 |
| Achromatopsia (no color) | #484848 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633670
#633670
oklch(41.4% 0.106 318.3)
- #2A5819
#2A5819
oklch(41.3% 0.106 138.4)
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 #633670, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.067
- Rebecca Purple #663399 ΔE 0.069
- Twilight #4E518B ΔE 0.081
- Blueberry #464196 ΔE 0.082
- Grape Purple #5D1451 ΔE 0.083
- Dusk #4E5481 ΔE 0.084
- Brownish Purple #76424E ΔE 0.084
- Velvet #750851 ΔE 0.086
Use #633670 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.