#553A71
Closest named color: Dark Slate Blue (#483D8B). oklch(40.5% 0.094 305.2), rgb(85, 58, 113).
Aa
White text reads best on this color (9.41:1).
About this color
#553A71 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.094 and its hue 305°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.049 away. White text reads best on it, at 9.41:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.094) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.22:1 |
| White text | 9.41:1 |
Values
| HEX | #553A71 |
| RGB | rgb(85, 58, 113) |
| HSL | hsl(269, 32%, 34%) |
| OKLCH | oklch(40.5% 0.094 305.2) |
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 #553A71 | 9.41:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #553A71 | 2.22:1 | Fails | Lc 12.3 | Not readable |
| #553A71 text on white | 9.41:1 | AAA | Lc 91.6 | Preferred for body text |
| #553A71 text on black | 2.22:1 | Fails | Lc -10.8 | 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
#F6F4F9
oklch(97% 0.007 304.2)
-
Step 100
100
#ECE7F3
oklch(93.5% 0.017 304.8)
-
Step 200
200
#DED4EA
oklch(88.5% 0.032 306.2)
-
Step 300
300
#C9B8DE
oklch(80.9% 0.056 305.4)
-
Step 400
400
#AD93CD
oklch(70.7% 0.088 304.7)
-
Step 500
500
#9A77C0
oklch(63.2% 0.113 305.4)
-
Step 600
600
#845FAC
oklch(55.6% 0.122 304.9)
-
Step 700
700
#704E94
oklch(49.1% 0.114 305)
-
Step 800
800 (this color)
#553A71
oklch(40.5% 0.094 305.2)
-
Step 900
900
#4B3760
oklch(37.7% 0.072 305.7)
-
Step 950
950
#2C2039
oklch(27% 0.048 305.5)
#553A71 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) | #2B4573 | 0.069 |
| Deuteranopia (no green cones) | #324670 | 0.062 |
| Tritanopia (no blue cones) | #514350 | 0.069 |
| Achromatopsia (no color) | #464646 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #553A71
#553A71
oklch(40.5% 0.094 305.2)
- #3D510D
#3D510D
oklch(40.4% 0.093 125.2)
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 #553A71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.049
- Blueberry #464196 ΔE 0.066
- Twilight #4E518B ΔE 0.069
- Dusk #4E5481 ΔE 0.072
- Rebecca Purple #663399 ΔE 0.076
- Dusty Grape #545775 ΔE 0.082
- Dark Grey Blue #29465B ΔE 0.088
- Cobalt #1E488F ΔE 0.090
Use #553A71 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.