#553773
Closest named color: Dark Slate Blue (#483D8B). oklch(40% 0.102 305.4), rgb(85, 55, 115).
Aa
White text reads best on this color (9.63:1).
About this color
#553773 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.102 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 0.046 away. White text reads best on it, at 9.63:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.102) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.18:1 |
| White text | 9.63:1 |
Values
| HEX | #553773 |
| RGB | rgb(85, 55, 115) |
| HSL | hsl(270, 35%, 33%) |
| OKLCH | oklch(40% 0.102 305.4) |
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 #553773 | 9.63:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #553773 | 2.18:1 | Fails | Lc 11.8 | Not readable |
| #553773 text on white | 9.63:1 | AAA | Lc 92.1 | Preferred for body text |
| #553773 text on black | 2.18:1 | Fails | Lc -10.3 | 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
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#EDE6F6
oklch(93.5% 0.023 305.6)
-
Step 200
200
#E0D3F0
oklch(88.6% 0.042 305.8)
-
Step 300
300
#CCB5E9
oklch(81% 0.076 304.9)
-
Step 400
400
#B38CDD
oklch(70.7% 0.122 305.6)
-
Step 500
500
#A06DD4
oklch(63.1% 0.156 305.2)
-
Step 600
600
#8B52C1
oklch(55.5% 0.17 305.2)
-
Step 700
700
#7742A7
oklch(49.2% 0.159 305.5)
-
Step 800
800
#603787
oklch(42.6% 0.131 305.1)
-
Step 900
900 (this color)
#553773
oklch(40% 0.102 305.4)
-
Step 950
950
#2E1D3F
oklch(27% 0.064 305.6)
#553773 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) | #254475 | 0.077 |
| Deuteranopia (no green cones) | #2E4571 | 0.070 |
| Tritanopia (no blue cones) | #50424F | 0.077 |
| Achromatopsia (no color) | #454545 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #553773
#553773
oklch(40% 0.102 305.4)
- #3B5000
#3B5000
oklch(39.9% 0.1 125.1)
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 #553773, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.046
- Blueberry #464196 ΔE 0.065
- Rebecca Purple #663399 ΔE 0.071
- Twilight #4E518B ΔE 0.074
- Dusk #4E5481 ΔE 0.079
- Grape Purple #5D1451 ΔE 0.087
- Dusty Grape #545775 ΔE 0.090
- Cobalt #1E488F ΔE 0.092
Use #553773 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.