#57287C
Closest named color: Dark Slate Blue (#483D8B). oklch(38.5% 0.139 306.7), rgb(87, 40, 124).
Aa
White text reads best on this color (10.50:1).
About this color
#57287C is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.139 and its hue 307°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.057 away. White text reads best on it, at 10.50:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.139) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.99:1 |
| White text | 10.50:1 |
Values
| HEX | #57287C |
| RGB | rgb(87, 40, 124) |
| HSL | hsl(274, 51%, 32%) |
| OKLCH | oklch(38.5% 0.139 306.7) |
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 #57287C | 10.50:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #57287C | 1.99:1 | Fails | Lc 10.1 | Not readable |
| #57287C text on white | 10.50:1 | AAA | Lc 93.8 | Preferred for body text |
| #57287C text on black | 1.99:1 | Fails | Lc -8.7 | 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
#F8F3FD
oklch(97.1% 0.014 308.3)
-
Step 100
100
#EFE5FA
oklch(93.6% 0.03 307.1)
-
Step 200
200
#E3D0F8
oklch(88.6% 0.058 306.7)
-
Step 300
300
#D2AFF6
oklch(80.9% 0.105 306.7)
-
Step 400
400
#BB81F1
oklch(70.6% 0.167 306.5)
-
Step 500
500
#AB5CEC
oklch(63.2% 0.212 306.5)
-
Step 600
600
#973ADA
oklch(55.6% 0.231 306.7)
-
Step 700
700
#812ABD
oklch(49.2% 0.215 306.8)
-
Step 800
800
#692699
oklch(42.8% 0.178 306.8)
-
Step 900
900 (this color)
#57287C
oklch(38.5% 0.139 306.7)
-
Step 950
950
#321747
oklch(27% 0.088 307.4)
#57287C 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) | #003E7F | 0.115 |
| Deuteranopia (no green cones) | #15407A | 0.107 |
| Tritanopia (no blue cones) | #513A4E | 0.099 |
| Achromatopsia (no color) | #3F3F3F | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57287C
#57287C
oklch(38.5% 0.139 306.7)
- #364C00
#364C00
oklch(38.4% 0.098 126.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes and gradients that use #57287C
These curated palettes and gradients contain exactly #57287C. Open one to see the full color scheme around it.
Gradients
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.057
- Rebecca Purple #663399 ΔE 0.060
- Indigo #4B0082 ΔE 0.063
- Royal Purple #4B006E ΔE 0.070
- Blueberry #464196 ΔE 0.074
- Grape Purple #5D1451 ΔE 0.080
- Chrysanthemum #560BAD ΔE 0.087
- Imperial Purple #480CA8 ΔE 0.089
Use #57287C 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.