#57366C
Closest named color: Dark Slate Blue (#483D8B). oklch(39.7% 0.095 310.9), rgb(87, 54, 108).
Aa
White text reads best on this color (9.76:1).
About this color
#57366C is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.095 and its hue 311°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.058 away. White text reads best on it, at 9.76:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.095) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.14:1 |
| White text | 9.76:1 |
Values
| HEX | #57366C |
| RGB | rgb(87, 54, 108) |
| HSL | hsl(277, 33%, 32%) |
| OKLCH | oklch(39.7% 0.095 310.9) |
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 #57366C | 9.76:1 | AAA | Lc -96.7 | Preferred for body text |
| Black text on #57366C | 2.14:1 | Fails | Lc 11.5 | Not readable |
| #57366C text on white | 9.76:1 | AAA | Lc 92.5 | Preferred for body text |
| #57366C text on black | 2.14:1 | Fails | Lc -10.0 | 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
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#EEE6F4
oklch(93.5% 0.021 311.1)
-
Step 200
200
#E2D2ED
oklch(88.5% 0.04 311.7)
-
Step 300
300
#CFB4E3
oklch(80.8% 0.071 310.6)
-
Step 400
400
#B78CD5
oklch(70.7% 0.113 310.7)
-
Step 500
500
#A66DCA
oklch(63.2% 0.146 311.1)
-
Step 600
600
#9153B6
oklch(55.6% 0.158 311.2)
-
Step 700
700
#7B439D
oklch(49.1% 0.147 310.8)
-
Step 800
800
#64387F
oklch(42.7% 0.121 310.9)
-
Step 900
900 (this color)
#57366C
oklch(39.7% 0.095 310.9)
-
Step 950
950
#301D3C
oklch(27% 0.061 311.2)
#57366C 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) | #29426E | 0.077 |
| Deuteranopia (no green cones) | #33446B | 0.068 |
| Tritanopia (no blue cones) | #553F4C | 0.067 |
| Achromatopsia (no color) | #444444 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57366C
#57366C
oklch(39.7% 0.095 310.9)
- #345111
#345111
oklch(39.8% 0.096 131.1)
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 #57366C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.058
- Blueberry #464196 ΔE 0.077
- Grape Purple #5D1451 ΔE 0.079
- Rebecca Purple #663399 ΔE 0.080
- Twilight #4E518B ΔE 0.081
- Dusk #4E5481 ΔE 0.083
- Purple Brown #673A3F ΔE 0.087
- Dusty Grape #545775 ΔE 0.091
Use #57366C 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.