#57418C
Closest named color: Dark Slate Blue (#483D8B). oklch(43.7% 0.12 294.4), rgb(87, 65, 140).
Aa
White text reads best on this color (8.26:1).
About this color
#57418C is a dark, moderately saturated purple. In OKLCH its lightness is 44%, its chroma 0.120 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.029 away. White text reads best on it, at 8.26:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.120) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.54:1 |
| White text | 8.26:1 |
Values
| HEX | #57418C |
| RGB | rgb(87, 65, 140) |
| HSL | hsl(258, 37%, 40%) |
| OKLCH | oklch(43.7% 0.12 294.4) |
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 #57418C | 8.26:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #57418C | 2.54:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #57418C text on white | 8.26:1 | AAA | Lc 88.3 | Fine for body text |
| #57418C text on black | 2.54:1 | Fails | Lc -13.8 | 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 800.
-
Step 50
50
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#EAE8F6
oklch(93.7% 0.019 292.6)
-
Step 200
200
#DAD5F1
oklch(88.6% 0.038 293.8)
-
Step 300
300
#C3B8EA
oklch(80.8% 0.071 294.9)
-
Step 400
400
#A592DF
oklch(70.6% 0.112 294.7)
-
Step 500
500
#9075D6
oklch(63% 0.143 294.8)
-
Step 600
600
#7B5CC4
oklch(55.6% 0.156 294.5)
-
Step 700
700
#684BA9
oklch(49.1% 0.145 294.7)
-
Step 800
800 (this color)
#57418C
oklch(43.7% 0.12 294.4)
-
Step 900
900
#45366E
oklch(37.8% 0.094 293.8)
-
Step 950
950
#282040
oklch(27% 0.059 293.6)
#57418C 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) | #234F8F | 0.074 |
| Deuteranopia (no green cones) | #274D8A | 0.071 |
| Tritanopia (no blue cones) | #4A5060 | 0.096 |
| Achromatopsia (no color) | #4E4E4E | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57418C
#57418C
oklch(43.7% 0.12 294.4)
- #515700
#515700
oklch(43.6% 0.098 114.3)
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 #57418C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.029
- Blueberry #464196 ΔE 0.033
- Twilight #4E518B ΔE 0.044
- Rebecca Purple #663399 ΔE 0.046
- Dusk #4E5481 ΔE 0.059
- Denim Blue #3B5B92 ΔE 0.076
- Dusk Blue #26538D ΔE 0.076
- Cobalt #1E488F ΔE 0.076
Use #57418C 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.