#553183
Closest named color: Dark Slate Blue (#483D8B). oklch(40.1% 0.133 300.8), rgb(85, 49, 131).
Aa
White text reads best on this color (9.75:1).
About this color
#553183 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.133 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 0.037 away. White text reads best on it, at 9.75:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.133) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.15:1 |
| White text | 9.75:1 |
Values
| HEX | #553183 |
| RGB | rgb(85, 49, 131) |
| HSL | hsl(266, 46%, 35%) |
| OKLCH | oklch(40.1% 0.133 300.8) |
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 #553183 | 9.75:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #553183 | 2.15:1 | Fails | Lc 11.7 | Not readable |
| #553183 text on white | 9.75:1 | AAA | Lc 92.2 | Preferred for body text |
| #553183 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
#EDE6FB
oklch(93.7% 0.029 301)
-
Step 200
200
#DFD1F9
oklch(88.5% 0.056 301.2)
-
Step 300
300
#CBB2F7
oklch(80.9% 0.099 300.8)
-
Step 400
400
#B286F4
oklch(70.7% 0.161 300.8)
-
Step 500
500
#A063EF
oklch(63.2% 0.204 300.8)
-
Step 600
600
#8C44DD
oklch(55.7% 0.221 300.9)
-
Step 700
700
#7733C0
oklch(49.1% 0.206 300.9)
-
Step 800
800
#612C9B
oklch(42.7% 0.171 301.2)
-
Step 900
900 (this color)
#553183
oklch(40.1% 0.133 300.8)
-
Step 950
950
#2E1A48
oklch(27% 0.083 301.1)
#553183 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) | #004486 | 0.103 |
| Deuteranopia (no green cones) | #164381 | 0.094 |
| Tritanopia (no blue cones) | #4B4255 | 0.100 |
| Achromatopsia (no color) | #444444 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #553183
#553183
oklch(40.1% 0.133 300.8)
- #414F00
#414F00
oklch(40.1% 0.096 120.6)
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 #553183, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.037
- Rebecca Purple #663399 ΔE 0.048
- Blueberry #464196 ΔE 0.052
- Indigo #4B0082 ΔE 0.077
- Twilight #4E518B ΔE 0.082
- Chrysanthemum #560BAD ΔE 0.084
- Imperial Purple #480CA8 ΔE 0.087
- Royal Purple #4B006E ΔE 0.090
Use #553183 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.