#553566
Closest named color: Dark Slate Blue (#483D8B). oklch(38.9% 0.088 313), rgb(85, 53, 102).
Aa
White text reads best on this color (10.06:1).
About this color
#553566 is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.088 and its hue 313°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.066 away. White text reads best on it, at 10.06:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.088) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.08:1 |
| White text | 10.06:1 |
Values
| HEX | #553566 |
| RGB | rgb(85, 53, 102) |
| HSL | hsl(279, 32%, 30%) |
| OKLCH | oklch(38.9% 0.088 313) |
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 #553566 | 10.06:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #553566 | 2.08:1 | Fails | Lc 10.8 | Not readable |
| #553566 text on white | 10.06:1 | AAA | Lc 93.2 | Preferred for body text |
| #553566 text on black | 2.08:1 | Fails | Lc -9.3 | 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
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#EEE6F3
oklch(93.5% 0.019 312.8)
-
Step 200
200
#E2D3EB
oklch(88.6% 0.036 313)
-
Step 300
300
#D0B5E0
oklch(81% 0.066 312.9)
-
Step 400
400
#B88DD0
oklch(70.8% 0.106 313)
-
Step 500
500
#A66FC3
oklch(63.1% 0.135 313.2)
-
Step 600
600
#9155B0
oklch(55.6% 0.148 313)
-
Step 700
700
#7B4597
oklch(49.1% 0.137 312.8)
-
Step 800
800
#64397A
oklch(42.6% 0.113 313.1)
-
Step 900
900 (this color)
#553566
oklch(38.9% 0.088 313)
-
Step 950
950
#301E3A
oklch(27.1% 0.055 312.7)
#553566 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) | #2B4068 | 0.072 |
| Deuteranopia (no green cones) | #334365 | 0.066 |
| Tritanopia (no blue cones) | #533C48 | 0.061 |
| Achromatopsia (no color) | #424242 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #553566
#553566
oklch(38.9% 0.088 313)
- #314E18
#314E18
oklch(38.8% 0.088 133)
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 #553566, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.066
- Grape Purple #5D1451 ΔE 0.074
- Purple Brown #673A3F ΔE 0.081
- Blueberry #464196 ΔE 0.085
- Dark Grey Blue #29465B ΔE 0.087
- Twilight #4E518B ΔE 0.088
- Dusk #4E5481 ΔE 0.088
- Rebecca Purple #663399 ΔE 0.091
Use #553566 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.