#553681
Closest named color: Dark Slate Blue (#483D8B). oklch(40.8% 0.122 300.1), rgb(85, 54, 129).
Aa
White text reads best on this color (9.41:1).
About this color
#553681 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.122 and its hue 300°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.031 away. White text reads best on it, at 9.41:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.122) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.23:1 |
| White text | 9.41:1 |
Values
| HEX | #553681 |
| RGB | rgb(85, 54, 129) |
| HSL | hsl(265, 41%, 36%) |
| OKLCH | oklch(40.8% 0.122 300.1) |
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 #553681 | 9.41:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #553681 | 2.23:1 | Fails | Lc 12.5 | Not readable |
| #553681 text on white | 9.41:1 | AAA | Lc 91.5 | Preferred for body text |
| #553681 text on black | 2.23:1 | Fails | Lc -10.9 | 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 800.
-
Step 50
50
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#ECE7F6
oklch(93.6% 0.021 301.1)
-
Step 200
200
#DDD4F0
oklch(88.6% 0.039 300.2)
-
Step 300
300
#C7B7E9
oklch(80.9% 0.071 299.4)
-
Step 400
400
#AC90DD
oklch(70.8% 0.114 300.2)
-
Step 500
500
#9872D4
oklch(63.1% 0.147 300.1)
-
Step 600
600
#8358C1
oklch(55.6% 0.16 300.2)
-
Step 700
700
#6F48A7
oklch(49.2% 0.148 299.9)
-
Step 800
800 (this color)
#553681
oklch(40.8% 0.122 300.1)
-
Step 900
900
#4A346C
oklch(37.8% 0.095 300)
-
Step 950
950
#2B1F3F
oklch(27% 0.059 299.7)
#553681 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) | #154683 | 0.090 |
| Deuteranopia (no green cones) | #21467F | 0.082 |
| Tritanopia (no blue cones) | #4C4556 | 0.093 |
| Achromatopsia (no color) | #464646 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #553681
#553681
oklch(40.8% 0.122 300.1)
- #435100
#435100
oklch(40.8% 0.097 120.4)
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 #553681, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.031
- Blueberry #464196 ΔE 0.048
- Rebecca Purple #663399 ΔE 0.051
- Twilight #4E518B ΔE 0.070
- Dusk #4E5481 ΔE 0.081
- Cobalt #1E488F ΔE 0.085
- Indigo #4B0082 ΔE 0.089
- Dusk Blue #26538D ΔE 0.094
Use #553681 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.