#553F89
Closest named color: Dark Slate Blue (#483D8B). oklch(42.9% 0.119 294.6), rgb(85, 63, 137).
Aa
White text reads best on this color (8.54:1).
About this color
#553F89 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.119 and its hue 295°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.024 away. White text reads best on it, at 8.54:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.119) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.45:1 |
| White text | 8.54:1 |
Values
| HEX | #553F89 |
| RGB | rgb(85, 63, 137) |
| HSL | hsl(258, 37%, 39%) |
| OKLCH | oklch(42.9% 0.119 294.6) |
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 #553F89 | 8.54:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #553F89 | 2.45:1 | Fails | Lc 14.8 | Not readable |
| #553F89 text on white | 8.54:1 | AAA | Lc 89.2 | Fine for body text |
| #553F89 text on black | 2.45:1 | Fails | Lc -13.1 | 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 800.
-
Step 50
50
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#EAE8F6
oklch(93.7% 0.019 292.6)
-
Step 200
200
#DAD5F1
oklch(88.6% 0.038 293.8)
-
Step 300
300
#C3B8EA
oklch(80.8% 0.071 294.9)
-
Step 400
400
#A592DF
oklch(70.6% 0.112 294.7)
-
Step 500
500
#9076D6
oklch(63.2% 0.142 294.5)
-
Step 600
600
#7B5CC3
oklch(55.6% 0.155 294.7)
-
Step 700
700
#684BA8
oklch(49% 0.144 294.9)
-
Step 800
800 (this color)
#553F89
oklch(42.9% 0.119 294.6)
-
Step 900
900
#45366D
oklch(37.7% 0.092 294.1)
-
Step 950
950
#292040
oklch(27.1% 0.059 295.2)
#553F89 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) | #214D8C | 0.074 |
| Deuteranopia (no green cones) | #264B87 | 0.070 |
| Tritanopia (no blue cones) | #484E5E | 0.095 |
| Achromatopsia (no color) | #4C4C4C | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #553F89
#553F89
oklch(42.9% 0.119 294.6)
- #4F5500
#4F5500
oklch(42.9% 0.097 114.4)
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 #553F89, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.024
- Blueberry #464196 ΔE 0.033
- Rebecca Purple #663399 ΔE 0.048
- Twilight #4E518B ΔE 0.048
- Dusk #4E5481 ΔE 0.062
- Cobalt #1E488F ΔE 0.074
- Dusk Blue #26538D ΔE 0.077
- Denim Blue #3B5B92 ΔE 0.080
Use #553F89 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.