#553771
Closest named color: Dark Slate Blue (#483D8B). oklch(39.9% 0.099 306.3), rgb(85, 55, 113).
Aa
White text reads best on this color (9.67:1).
About this color
#553771 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.099 and its hue 306°. 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 9.67:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.099) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.17:1 |
| White text | 9.67:1 |
Values
| HEX | #553771 |
| RGB | rgb(85, 55, 113) |
| HSL | hsl(271, 35%, 33%) |
| OKLCH | oklch(39.9% 0.099 306.3) |
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 #553771 | 9.67:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #553771 | 2.17:1 | Fails | Lc 11.7 | Not readable |
| #553771 text on white | 9.67:1 | AAA | Lc 92.2 | Preferred for body text |
| #553771 text on black | 2.17:1 | Fails | Lc -10.2 | 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
#E0D3EF
oklch(88.6% 0.04 306.5)
-
Step 300
300
#CDB5E7
oklch(81% 0.074 306.6)
-
Step 400
400
#B38CDB
oklch(70.6% 0.119 306.2)
-
Step 500
500
#A16ED1
oklch(63.2% 0.152 306.3)
-
Step 600
600
#8C53BE
oklch(55.6% 0.166 306.3)
-
Step 700
700
#7743A4
oklch(49.1% 0.154 306.3)
-
Step 800
800
#613885
oklch(42.8% 0.127 306.3)
-
Step 900
900 (this color)
#553771
oklch(39.9% 0.099 306.3)
-
Step 950
950
#2E1D3E
oklch(26.9% 0.063 306.4)
#553771 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) | #274373 | 0.075 |
| Deuteranopia (no green cones) | #2F4570 | 0.069 |
| Tritanopia (no blue cones) | #51414E | 0.073 |
| Achromatopsia (no color) | #444444 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #553771
#553771
oklch(39.9% 0.099 306.3)
- #3A5004
#3A5004
oklch(39.8% 0.099 126)
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 #553771, 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 0.068
- Rebecca Purple #663399 ΔE 0.074
- Twilight #4E518B ΔE 0.075
- Dusk #4E5481 ΔE 0.079
- Grape Purple #5D1451 ΔE 0.085
- Dusty Grape #545775 ΔE 0.090
- Dark Grey Blue #29465B ΔE 0.092
Use #553771 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.