#63376F
Closest named color: Dark Slate Blue (#483D8B). oklch(41.5% 0.103 318.8), rgb(99, 55, 111).
Aa
White text reads best on this color (9.10:1).
About this color
#63376F is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.103 and its hue 319°. 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 9.10:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.103) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.30:1 |
| White text | 9.10:1 |
Values
| HEX | #63376F |
| RGB | rgb(99, 55, 111) |
| HSL | hsl(287, 34%, 33%) |
| OKLCH | oklch(41.5% 0.103 318.8) |
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 #63376F | 9.10:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #63376F | 2.30:1 | Fails | Lc 13.3 | Not readable |
| #63376F text on white | 9.10:1 | AAA | Lc 90.7 | Preferred for body text |
| #63376F text on black | 2.30:1 | Fails | Lc -11.6 | 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
#EFE6F1
oklch(93.5% 0.018 320.1)
-
Step 200
200
#E3D3E8
oklch(88.6% 0.033 318.1)
-
Step 300
300
#D2B5DA
oklch(81% 0.06 318.9)
-
Step 400
400
#BA8DC7
oklch(70.6% 0.096 318.5)
-
Step 500
500
#A970B9
oklch(63.2% 0.123 318.7)
-
Step 600
600
#9457A5
oklch(55.7% 0.134 318.6)
-
Step 700
700
#7E468D
oklch(49% 0.125 318.9)
-
Step 800
800 (this color)
#63376F
oklch(41.5% 0.103 318.8)
-
Step 900
900
#53335D
oklch(37.8% 0.08 317.8)
-
Step 950
950
#311E36
oklch(27% 0.05 319.1)
#63376F 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) | #2D4571 | 0.093 |
| Deuteranopia (no green cones) | #3A4A6D | 0.083 |
| Tritanopia (no blue cones) | #633F4E | 0.066 |
| Achromatopsia (no color) | #484848 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63376F
#63376F
oklch(41.5% 0.103 318.8)
- #2B581C
#2B581C
oklch(41.4% 0.103 138.8)
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 #63376F, 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 0.071
- Twilight #4E518B ΔE 0.080
- Brownish Purple #76424E ΔE 0.081
- Dusk #4E5481 ΔE 0.082
- Blueberry #464196 ΔE 0.083
- Grape Purple #5D1451 ΔE 0.084
- Purple Brown #673A3F ΔE 0.085
Use #63376F 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.