#553D9D
Closest named color: Blueberry (#464196). oklch(44% 0.149 290.5), rgb(85, 61, 157).
Aa
White text reads best on this color (8.26:1).
About this color
#553D9D is a dark, vivid purple. In OKLCH its lightness is 44%, its chroma 0.149 and its hue 290°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.028 away. White text reads best on it, at 8.26:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | vivid (0.149) |
| Temperature | in between |
| Nearest name | Blueberry (#464196) |
| Black text | 2.54:1 |
| White text | 8.26:1 |
Values
| HEX | #553D9D |
| RGB | rgb(85, 61, 157) |
| HSL | hsl(255, 44%, 43%) |
| OKLCH | oklch(44% 0.149 290.5) |
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 #553D9D | 8.26:1 | AAA | Lc -92.8 | Preferred for body text |
| Black text on #553D9D | 2.54:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #553D9D text on white | 8.26:1 | AAA | Lc 88.2 | Fine for body text |
| #553D9D text on black | 2.54:1 | Fails | Lc -14.0 | 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#E9E7FA
oklch(93.5% 0.026 290.7)
-
Step 200
200
#D8D4F8
oklch(88.4% 0.049 290.4)
-
Step 300
300
#C0B7F5
oklch(80.8% 0.087 291)
-
Step 400
400
#A190F1
oklch(70.8% 0.139 290.4)
-
Step 500
500
#8B71EB
oklch(63.1% 0.177 290.2)
-
Step 600
600
#7755DA
oklch(55.6% 0.194 290.4)
-
Step 700
700
#6444BD
oklch(49% 0.181 290.3)
-
Step 800
800 (this color)
#553D9D
oklch(44% 0.149 290.5)
-
Step 900
900
#43327A
oklch(37.6% 0.118 290.5)
-
Step 950
950
#271E47
oklch(26.9% 0.074 290.7)
#553D9D 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) | #0050A0 | 0.089 |
| Deuteranopia (no green cones) | #004C9B | 0.089 |
| Tritanopia (no blue cones) | #3F5367 | 0.121 |
| Achromatopsia (no color) | #4E4E4E | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #553D9D
#553D9D
oklch(44% 0.149 290.5)
- #565700
#565700
oklch(44.1% 0.097 110.5)
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 #553D9D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.028
- Rebecca Purple #663399 ΔE 0.037
- Dark Slate Blue #483D8B ΔE 0.037
- Twilight #4E518B ΔE 0.063
- Blue With A Hint Of Purple #533CC6 ΔE 0.066
- Bluey Purple #6241C7 ΔE 0.071
- Blurple #5539CC ΔE 0.075
- Chrysanthemum #560BAD ΔE 0.077
Use #553D9D 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.