#552D8B
Closest named color: Dark Slate Blue (#483D8B). oklch(40.1% 0.149 299.1), rgb(85, 45, 139).
Aa
White text reads best on this color (9.83:1).
About this color
#552D8B is a dark, vivid purple. In OKLCH its lightness is 40%, its chroma 0.149 and its hue 299°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.041 away. White text reads best on it, at 9.83:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | vivid (0.149) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.13:1 |
| White text | 9.83:1 |
Values
| HEX | #552D8B |
| RGB | rgb(85, 45, 139) |
| HSL | hsl(266, 51%, 36%) |
| OKLCH | oklch(40.1% 0.149 299.1) |
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 #552D8B | 9.83:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #552D8B | 2.13:1 | Fails | Lc 11.7 | Not readable |
| #552D8B text on white | 9.83:1 | AAA | Lc 92.3 | Preferred for body text |
| #552D8B text on black | 2.13:1 | 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
#F7F3FE
oklch(97% 0.015 302.6)
-
Step 100
100
#ECE6FD
oklch(93.6% 0.031 297.7)
-
Step 200
200
#DED1FD
oklch(88.5% 0.061 298.7)
-
Step 300
300
#CAB1FF
oklch(81% 0.111 298.6)
-
Step 400
400
#B183FF
oklch(70.7% 0.179 298.9)
-
Step 500
500
#A05CFD
oklch(63.1% 0.229 299.1)
-
Step 600
600
#8C39EC
oklch(55.7% 0.248 299)
-
Step 700
700
#7728CD
oklch(49.1% 0.23 299)
-
Step 800
800
#6124A6
oklch(42.7% 0.192 299.2)
-
Step 900
900 (this color)
#552D8B
oklch(40.1% 0.149 299.1)
-
Step 950
950
#2E184D
oklch(27.1% 0.094 299.1)
#552D8B 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) | #00438E | 0.105 |
| Deuteranopia (no green cones) | #004389 | 0.106 |
| Tritanopia (no blue cones) | #494358 | 0.113 |
| Achromatopsia (no color) | #434343 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #552D8B
#552D8B
oklch(40.1% 0.149 299.1)
- #434E00
#434E00
oklch(40% 0.094 118.6)
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 #552D8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.041
- Rebecca Purple #663399 ΔE 0.042
- Blueberry #464196 ΔE 0.053
- Chrysanthemum #560BAD ΔE 0.068
- Indigo #4B0082 ΔE 0.070
- Imperial Purple #480CA8 ΔE 0.072
- Royal Purple #4B006E ΔE 0.088
- Twilight #4E518B ΔE 0.090
Use #552D8B 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.