#553D72
Closest named color: Dark Slate Blue (#483D8B). oklch(41.1% 0.09 303.6), rgb(85, 61, 114).
Aa
White text reads best on this color (9.14:1).
About this color
#553D72 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.090 and its hue 304°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.048 away. White text reads best on it, at 9.14:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.090) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.29:1 |
| White text | 9.14:1 |
Values
| HEX | #553D72 |
| RGB | rgb(85, 61, 114) |
| HSL | hsl(267, 30%, 34%) |
| OKLCH | oklch(41.1% 0.09 303.6) |
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 #553D72 | 9.14:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #553D72 | 2.29:1 | Fails | Lc 13.0 | Not readable |
| #553D72 text on white | 9.14:1 | AAA | Lc 90.9 | Preferred for body text |
| #553D72 text on black | 2.29:1 | Fails | Lc -11.4 | 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
#F6F4F9
oklch(97% 0.007 304.2)
-
Step 100
100
#ECE8F2
oklch(93.7% 0.014 304.1)
-
Step 200
200
#DDD5E9
oklch(88.5% 0.028 303.9)
-
Step 300
300
#C7B9DD
oklch(80.9% 0.052 302.9)
-
Step 400
400
#AB94CC
oklch(70.7% 0.084 303.1)
-
Step 500
500
#9779BE
oklch(63.1% 0.106 303.5)
-
Step 600
600
#8261AB
oklch(55.7% 0.116 303.4)
-
Step 700
700
#6E5092
oklch(49.2% 0.107 303.7)
-
Step 800
800 (this color)
#553D72
oklch(41.1% 0.09 303.6)
-
Step 900
900
#493860
oklch(37.7% 0.069 302.8)
-
Step 950
950
#2B2138
oklch(27% 0.044 303.6)
#553D72 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) | #2F4774 | 0.062 |
| Deuteranopia (no green cones) | #354871 | 0.057 |
| Tritanopia (no blue cones) | #504652 | 0.068 |
| Achromatopsia (no color) | #484848 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #553D72
#553D72
oklch(41.1% 0.09 303.6)
- #415212
#415212
oklch(41% 0.089 123.4)
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 #553D72, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.048
- Twilight #4E518B ΔE 0.062
- Blueberry #464196 ΔE 0.064
- Dusk #4E5481 ΔE 0.064
- Dusty Grape #545775 ΔE 0.074
- Rebecca Purple #663399 ΔE 0.076
- YInMn Blue #415A77 ΔE 0.085
- Dark Grey Blue #29465B ΔE 0.085
Use #553D72 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.