#63336C
Closest named color: Dark Slate Blue (#483D8B). oklch(40.7% 0.107 321.1), rgb(99, 51, 108).
Aa
White text reads best on this color (9.45:1).
About this color
#63336C is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.107 and its hue 321°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.072 away. White text reads best on it, at 9.45:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.107) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.22:1 |
| White text | 9.45:1 |
Values
| HEX | #63336C |
| RGB | rgb(99, 51, 108) |
| HSL | hsl(291, 36%, 31%) |
| OKLCH | oklch(40.7% 0.107 321.1) |
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 #63336C | 9.45:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #63336C | 2.22:1 | Fails | Lc 12.4 | Not readable |
| #63336C text on white | 9.45:1 | AAA | Lc 91.6 | Preferred for body text |
| #63336C text on black | 2.22:1 | Fails | Lc -10.8 | 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
#F0E6F1
oklch(93.6% 0.018 323)
-
Step 200
200
#E4D2E7
oklch(88.5% 0.034 321.4)
-
Step 300
300
#D4B4D9
oklch(80.9% 0.062 321.7)
-
Step 400
400
#BD8CC7
oklch(70.7% 0.1 320.6)
-
Step 500
500
#AC6EB8
oklch(63.1% 0.127 320.9)
-
Step 600
600
#9754A4
oklch(55.5% 0.139 320.9)
-
Step 700
700
#81448C
oklch(49% 0.129 321.3)
-
Step 800
800 (this color)
#63336C
oklch(40.7% 0.107 321.1)
-
Step 900
900
#55315C
oklch(37.6% 0.084 320.9)
-
Step 950
950
#321D36
oklch(26.9% 0.053 321)
#63336C 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) | #2A426E | 0.099 |
| Deuteranopia (no green cones) | #38486A | 0.089 |
| Tritanopia (no blue cones) | #643B4A | 0.067 |
| Achromatopsia (no color) | #464646 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63336C
#63336C
oklch(40.7% 0.107 321.1)
- #23571B
#23571B
oklch(40.7% 0.107 141.1)
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 #63336C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.072
- Grape Purple #5D1451 ΔE 0.074
- Rebecca Purple #663399 ΔE 0.075
- Velvet #750851 ΔE 0.079
- Rich Purple #720058 ΔE 0.079
- Purple Brown #673A3F ΔE 0.084
- Brownish Purple #76424E ΔE 0.084
- Blueberry #464196 ΔE 0.088
Use #63336C 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.