#553673
Closest named color: Dark Slate Blue (#483D8B). oklch(39.8% 0.104 305.7), rgb(85, 54, 115).
Aa
White text reads best on this color (9.71:1).
About this color
#553673 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.104 and its hue 306°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.047 away. White text reads best on it, at 9.71:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.104) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.16:1 |
| White text | 9.71:1 |
Values
| HEX | #553673 |
| RGB | rgb(85, 54, 115) |
| HSL | hsl(270, 36%, 33%) |
| OKLCH | oklch(39.8% 0.104 305.7) |
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 #553673 | 9.71:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #553673 | 2.16:1 | Fails | Lc 11.6 | Not readable |
| #553673 text on white | 9.71:1 | AAA | Lc 92.3 | Preferred for body text |
| #553673 text on black | 2.16:1 | Fails | Lc -10.1 | 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
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#EDE6F6
oklch(93.5% 0.023 305.6)
-
Step 200
200
#E0D2F0
oklch(88.4% 0.043 306.5)
-
Step 300
300
#CDB4E9
oklch(80.9% 0.078 306.1)
-
Step 400
400
#B38BDE
oklch(70.6% 0.125 305.6)
-
Step 500
500
#A16CD5
oklch(63.1% 0.16 305.6)
-
Step 600
600
#8C51C2
oklch(55.5% 0.173 305.6)
-
Step 700
700
#7741A7
oklch(49% 0.16 305.7)
-
Step 800
800
#613688
oklch(42.7% 0.134 305.6)
-
Step 900
900 (this color)
#553673
oklch(39.8% 0.104 305.7)
-
Step 950
950
#2E1D40
oklch(27% 0.066 304.8)
#553673 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) | #244375 | 0.079 |
| Deuteranopia (no green cones) | #2D4471 | 0.071 |
| Tritanopia (no blue cones) | #50414F | 0.077 |
| Achromatopsia (no color) | #444444 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #553673
#553673
oklch(39.8% 0.104 305.7)
- #3A5000
#3A5000
oklch(39.8% 0.101 125.7)
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 #553673, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.047
- Blueberry #464196 ΔE 0.065
- Rebecca Purple #663399 ΔE 0.071
- Twilight #4E518B ΔE 0.076
- Dusk #4E5481 ΔE 0.081
- Grape Purple #5D1451 ΔE 0.085
- Cobalt #1E488F ΔE 0.093
- Dusty Grape #545775 ΔE 0.093
Use #553673 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.