#553787
Closest named color: Dark Slate Blue (#483D8B). oklch(41.4% 0.129 297.8), rgb(85, 55, 135).
Aa
White text reads best on this color (9.20:1).
About this color
#553787 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.129 and its hue 298°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.026 away. White text reads best on it, at 9.20:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.129) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.28:1 |
| White text | 9.20:1 |
Values
| HEX | #553787 |
| RGB | rgb(85, 55, 135) |
| HSL | hsl(263, 42%, 37%) |
| OKLCH | oklch(41.4% 0.129 297.8) |
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 #553787 | 9.20:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #553787 | 2.28:1 | Fails | Lc 13.1 | Not readable |
| #553787 text on white | 9.20:1 | AAA | Lc 90.9 | Preferred for body text |
| #553787 text on black | 2.28:1 | 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
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#EBE7F7
oklch(93.6% 0.022 297.4)
-
Step 200
200
#DCD4F2
oklch(88.6% 0.042 297.7)
-
Step 300
300
#C6B7EC
oklch(81% 0.075 297.7)
-
Step 400
400
#AA8FE2
oklch(70.7% 0.122 298.2)
-
Step 500
500
#9672D9
oklch(63.2% 0.153 298)
-
Step 600
600
#8157C7
oklch(55.6% 0.168 298)
-
Step 700
700
#6D47AC
oklch(49.2% 0.155 297.8)
-
Step 800
800 (this color)
#553787
oklch(41.4% 0.129 297.8)
-
Step 900
900
#49336F
oklch(37.7% 0.101 298.4)
-
Step 950
950
#2A1F41
oklch(27% 0.062 297)
#553787 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) | #0E488A | 0.092 |
| Deuteranopia (no green cones) | #1B4785 | 0.085 |
| Tritanopia (no blue cones) | #4A4859 | 0.101 |
| Achromatopsia (no color) | #484848 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #553787
#553787
oklch(41.4% 0.129 297.8)
- #475200
#475200
oklch(41.4% 0.097 118.2)
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 #553787, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.026
- Blueberry #464196 ΔE 0.040
- Rebecca Purple #663399 ΔE 0.043
- Twilight #4E518B ΔE 0.067
- Dusk #4E5481 ΔE 0.080
- Cobalt #1E488F ΔE 0.082
- Chrysanthemum #560BAD ΔE 0.088
- Indigo #4B0082 ΔE 0.091
Use #553787 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.