#57366E
Closest named color: Dark Slate Blue (#483D8B). oklch(39.8% 0.098 309.8), rgb(87, 54, 110).
Aa
White text reads best on this color (9.73:1).
About this color
#57366E is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.098 and its hue 310°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.056 away. White text reads best on it, at 9.73:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.098) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.15:1 |
| White text | 9.73:1 |
Values
| HEX | #57366E |
| RGB | rgb(87, 54, 110) |
| HSL | hsl(275, 34%, 32%) |
| OKLCH | oklch(39.8% 0.098 309.8) |
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 #57366E | 9.73:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #57366E | 2.15:1 | Fails | Lc 11.6 | Not readable |
| #57366E text on white | 9.73:1 | AAA | Lc 92.4 | Preferred for body text |
| #57366E text on black | 2.15:1 | Fails | Lc -10.1 | 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
#EEE6F5
oklch(93.6% 0.022 309.6)
-
Step 200
200
#E1D2EE
oklch(88.4% 0.041 309.4)
-
Step 300
300
#CFB4E5
oklch(80.9% 0.074 309.6)
-
Step 400
400
#B78BD7
oklch(70.6% 0.118 310.1)
-
Step 500
500
#A56CCD
oklch(63.1% 0.151 309.8)
-
Step 600
600
#9052B9
oklch(55.6% 0.163 309.9)
-
Step 700
700
#7B42A0
oklch(49.2% 0.152 309.9)
-
Step 800
800
#643781
oklch(42.7% 0.125 310.2)
-
Step 900
900 (this color)
#57366E
oklch(39.8% 0.098 309.8)
-
Step 950
950
#301D3D
oklch(27.1% 0.062 310.2)
#57366E 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) | #284370 | 0.079 |
| Deuteranopia (no green cones) | #31456D | 0.071 |
| Tritanopia (no blue cones) | #543F4D | 0.068 |
| Achromatopsia (no color) | #444444 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57366E
#57366E
oklch(39.8% 0.098 309.8)
- #35510D
#35510D
oklch(39.8% 0.098 130)
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 #57366E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.056
- Blueberry #464196 ΔE 0.074
- Rebecca Purple #663399 ΔE 0.077
- Twilight #4E518B ΔE 0.080
- Grape Purple #5D1451 ΔE 0.080
- Dusk #4E5481 ΔE 0.082
- Purple Brown #673A3F ΔE 0.090
- Dusty Grape #545775 ΔE 0.092
Use #57366E 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.