#57336C
Closest named color: Dark Slate Blue (#483D8B). oklch(39.1% 0.101 311.7), rgb(87, 51, 108).
Aa
White text reads best on this color (10.02:1).
About this color
#57336C is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.101 and its hue 312°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.060 away. White text reads best on it, at 10.02:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.101) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.09:1 |
| White text | 10.02:1 |
Values
| HEX | #57336C |
| RGB | rgb(87, 51, 108) |
| HSL | hsl(278, 36%, 31%) |
| OKLCH | oklch(39.1% 0.101 311.7) |
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 #57336C | 10.02:1 | AAA | Lc -97.2 | Preferred for body text |
| Black text on #57336C | 2.09:1 | Fails | Lc 10.9 | Not readable |
| #57336C text on white | 10.02:1 | AAA | Lc 93.0 | Preferred for body text |
| #57336C text on black | 2.09:1 | Fails | Lc -9.5 | 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
#F8F4FB
oklch(97.2% 0.01 311.2)
-
Step 100
100
#EFE6F5
oklch(93.6% 0.022 312.2)
-
Step 200
200
#E2D2EE
oklch(88.5% 0.042 310.9)
-
Step 300
300
#D1B3E5
oklch(80.9% 0.076 311.7)
-
Step 400
400
#BA8AD7
oklch(70.8% 0.121 312.1)
-
Step 500
500
#A86ACC
oklch(63% 0.155 311.9)
-
Step 600
600
#9350B9
oklch(55.6% 0.167 311.6)
-
Step 700
700
#7D40A0
oklch(49.1% 0.156 311.3)
-
Step 800
800
#663581
oklch(42.6% 0.129 311.9)
-
Step 900
900 (this color)
#57336C
oklch(39.1% 0.101 311.7)
-
Step 950
950
#311C3D
oklch(27% 0.065 312.1)
#57336C 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) | #25406E | 0.084 |
| Deuteranopia (no green cones) | #30436B | 0.075 |
| Tritanopia (no blue cones) | #553C4A | 0.070 |
| Achromatopsia (no color) | #424242 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57336C
#57336C
oklch(39.1% 0.101 311.7)
- #30500A
#30500A
oklch(39.2% 0.101 132)
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 #57336C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.060
- Grape Purple #5D1451 ΔE 0.073
- Blueberry #464196 ΔE 0.079
- Rebecca Purple #663399 ΔE 0.079
- Twilight #4E518B ΔE 0.087
- Dusk #4E5481 ΔE 0.090
- Rich Purple #720058 ΔE 0.090
- Purple Brown #673A3F ΔE 0.091
Use #57336C 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.