#553365
Closest named color: Dark Slate Blue (#483D8B). oklch(38.5% 0.091 314.1), rgb(85, 51, 101).
Aa
White text reads best on this color (10.25:1).
About this color
#553365 is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.091 and its hue 314°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.069 away. White text reads best on it, at 10.25:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.091) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.04:1 |
| White text | 10.25:1 |
Values
| HEX | #553365 |
| RGB | rgb(85, 51, 101) |
| HSL | hsl(281, 33%, 30%) |
| OKLCH | oklch(38.5% 0.091 314.1) |
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 #553365 | 10.25:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #553365 | 2.04:1 | Fails | Lc 10.3 | Not readable |
| #553365 text on white | 10.25:1 | AAA | Lc 93.6 | Preferred for body text |
| #553365 text on black | 2.04:1 | Fails | Lc -8.9 | 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 900.
-
Step 50
50
#F8F4FA
oklch(97.2% 0.009 314.8)
-
Step 100
100
#EFE6F3
oklch(93.6% 0.02 315.7)
-
Step 200
200
#E2D2EB
oklch(88.4% 0.038 313.6)
-
Step 300
300
#D1B4E0
oklch(80.9% 0.068 314.1)
-
Step 400
400
#B98CD0
oklch(70.7% 0.108 313.9)
-
Step 500
500
#A86DC4
oklch(63.1% 0.14 314.2)
-
Step 600
600
#9353B0
oklch(55.5% 0.152 314.3)
-
Step 700
700
#7D4397
oklch(49% 0.141 314.3)
-
Step 800
800
#66387B
oklch(42.7% 0.117 314.2)
-
Step 900
900 (this color)
#553365
oklch(38.5% 0.091 314.1)
-
Step 950
950
#311D3A
oklch(27% 0.058 314.7)
#553365 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) | #293F67 | 0.076 |
| Deuteranopia (no green cones) | #324264 | 0.069 |
| Tritanopia (no blue cones) | #543A47 | 0.061 |
| Achromatopsia (no color) | #414141 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #553365
#553365
oklch(38.5% 0.091 314.1)
- #2E4E16
#2E4E16
oklch(38.6% 0.091 134.3)
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 #553365, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.069
- Grape Purple #5D1451 ΔE 0.069
- Purple Brown #673A3F ΔE 0.082
- Blueberry #464196 ΔE 0.088
- Dark Grey Blue #29465B ΔE 0.090
- Rich Purple #720058 ΔE 0.091
- Velvet #750851 ΔE 0.091
- Rebecca Purple #663399 ΔE 0.092
Use #553365 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.