#553281
Closest named color: Dark Slate Blue (#483D8B). oklch(40.1% 0.129 301.2), rgb(85, 50, 129).
Aa
White text reads best on this color (9.72:1).
About this color
#553281 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.129 and its hue 301°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.036 away. White text reads best on it, at 9.72:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.129) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.15:1 |
| White text | 9.72:1 |
Values
| HEX | #553281 |
| RGB | rgb(85, 50, 129) |
| HSL | hsl(267, 44%, 35%) |
| OKLCH | oklch(40.1% 0.129 301.2) |
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 #553281 | 9.72:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #553281 | 2.15:1 | Fails | Lc 11.8 | Not readable |
| #553281 text on white | 9.72:1 | AAA | Lc 92.2 | Preferred for body text |
| #553281 text on black | 2.15:1 | Fails | Lc -10.2 | 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
#F7F4FD
oklch(97.2% 0.012 301.3)
-
Step 100
100
#EDE6FA
oklch(93.6% 0.028 301.7)
-
Step 200
200
#DFD2F8
oklch(88.6% 0.053 300.9)
-
Step 300
300
#CBB2F6
oklch(80.9% 0.098 301.1)
-
Step 400
400
#B287F1
oklch(70.7% 0.155 301.3)
-
Step 500
500
#A064EC
oklch(63.1% 0.199 301.3)
-
Step 600
600
#8C46DA
oklch(55.7% 0.215 301.3)
-
Step 700
700
#7736BD
oklch(49.2% 0.2 301.3)
-
Step 800
800
#602E99
oklch(42.6% 0.166 300.9)
-
Step 900
900 (this color)
#553281
oklch(40.1% 0.129 301.2)
-
Step 950
950
#2E1A47
oklch(27% 0.082 301.7)
#553281 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) | #084484 | 0.099 |
| Deuteranopia (no green cones) | #1B447F | 0.090 |
| Tritanopia (no blue cones) | #4C4254 | 0.097 |
| Achromatopsia (no color) | #444444 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #553281
#553281
oklch(40.1% 0.129 301.2)
- #404F00
#404F00
oklch(40% 0.096 121.3)
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 #553281, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.036
- Rebecca Purple #663399 ΔE 0.050
- Blueberry #464196 ΔE 0.053
- Twilight #4E518B ΔE 0.080
- Indigo #4B0082 ΔE 0.080
- Chrysanthemum #560BAD ΔE 0.089
- Cobalt #1E488F ΔE 0.090
- Imperial Purple #480CA8 ΔE 0.091
Use #553281 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.