#573F88
Closest named color: Dark Slate Blue (#483D8B). oklch(43% 0.118 296.3), rgb(87, 63, 136).
Aa
White text reads best on this color (8.49:1).
About this color
#573F88 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.118 and its hue 296°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.028 away. White text reads best on it, at 8.49:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.118) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.47:1 |
| White text | 8.49:1 |
Values
| HEX | #573F88 |
| RGB | rgb(87, 63, 136) |
| HSL | hsl(260, 37%, 39%) |
| OKLCH | oklch(43% 0.118 296.3) |
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 #573F88 | 8.49:1 | AAA | Lc -93.6 | Preferred for body text |
| Black text on #573F88 | 2.47:1 | Fails | Lc 15.0 | Not readable |
| #573F88 text on white | 8.49:1 | AAA | Lc 89.0 | Fine for body text |
| #573F88 text on black | 2.47:1 | Fails | Lc -13.2 | 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 800.
-
Step 50
50
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#EBE7F6
oklch(93.5% 0.021 298.2)
-
Step 200
200
#DBD4F0
oklch(88.4% 0.039 297)
-
Step 300
300
#C4B8E9
oklch(80.9% 0.069 296)
-
Step 400
400
#A792DD
oklch(70.7% 0.11 296.4)
-
Step 500
500
#9275D4
oklch(63.1% 0.141 296.2)
-
Step 600
600
#7D5CC1
oklch(55.6% 0.153 296.2)
-
Step 700
700
#6A4BA7
oklch(49.2% 0.143 296.3)
-
Step 800
800 (this color)
#573F88
oklch(43% 0.118 296.3)
-
Step 900
900
#47356C
oklch(37.6% 0.092 296.8)
-
Step 950
950
#29203F
oklch(27% 0.057 295.7)
#573F88 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) | #224D8B | 0.076 |
| Deuteranopia (no green cones) | #284C86 | 0.072 |
| Tritanopia (no blue cones) | #4C4D5D | 0.092 |
| Achromatopsia (no color) | #4D4D4D | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573F88
#573F88
oklch(43% 0.118 296.3)
- #4D5600
#4D5600
oklch(43% 0.099 116.5)
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 #573F88, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.028
- Blueberry #464196 ΔE 0.036
- Rebecca Purple #663399 ΔE 0.047
- Twilight #4E518B ΔE 0.048
- Dusk #4E5481 ΔE 0.062
- Cobalt #1E488F ΔE 0.078
- Dusk Blue #26538D ΔE 0.079
- Dusty Grape #545775 ΔE 0.081
Use #573F88 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.