#57306B
Closest named color: Dark Slate Blue (#483D8B). oklch(38.5% 0.105 313), rgb(87, 48, 107).
Aa
White text reads best on this color (10.29:1).
About this color
#57306B is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.105 and its hue 313°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.064 away. White text reads best on it, at 10.29:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.105) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.04:1 |
| White text | 10.29:1 |
Values
| HEX | #57306B |
| RGB | rgb(87, 48, 107) |
| HSL | hsl(280, 38%, 30%) |
| OKLCH | oklch(38.5% 0.105 313) |
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 #57306B | 10.29:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #57306B | 2.04:1 | Fails | Lc 10.3 | Not readable |
| #57306B text on white | 10.29:1 | AAA | Lc 93.6 | Preferred for body text |
| #57306B text on black | 2.04:1 | Fails | Lc -8.9 | 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
#F8F3FB
oklch(97% 0.012 313.2)
-
Step 100
100
#EFE6F5
oklch(93.6% 0.022 312.2)
-
Step 200
200
#E3D1EE
oklch(88.4% 0.044 312.8)
-
Step 300
300
#D3B2E5
oklch(80.9% 0.079 313.6)
-
Step 400
400
#BC88D8
oklch(70.7% 0.126 313.2)
-
Step 500
500
#AB68CE
oklch(63.1% 0.161 312.9)
-
Step 600
600
#964DBA
oklch(55.6% 0.174 313)
-
Step 700
700
#803DA1
oklch(49.1% 0.163 312.9)
-
Step 800
800
#683382
oklch(42.7% 0.134 313.1)
-
Step 900
900 (this color)
#57306B
oklch(38.5% 0.105 313)
-
Step 950
950
#321B3D
oklch(27% 0.067 313.9)
#57306B 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) | #213E6D | 0.090 |
| Deuteranopia (no green cones) | #2E4169 | 0.080 |
| Tritanopia (no blue cones) | #553A48 | 0.073 |
| Achromatopsia (no color) | #404040 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57306B
#57306B
oklch(38.5% 0.105 313)
- #2C4F05
#2C4F05
oklch(38.6% 0.105 133)
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 #57306B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.064
- Grape Purple #5D1451 ΔE 0.067
- Rebecca Purple #663399 ΔE 0.081
- Blueberry #464196 ΔE 0.083
- Rich Purple #720058 ΔE 0.085
- Royal Purple #4B006E ΔE 0.088
- Velvet #750851 ΔE 0.088
- Indigo #4B0082 ΔE 0.092
Use #57306B 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.