#57378F
Closest named color: Dark Slate Blue (#483D8B). oklch(42.2% 0.14 296.7), rgb(87, 55, 143).
Aa
White text reads best on this color (8.94:1).
About this color
#57378F is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.140 and its hue 297°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.030 away. White text reads best on it, at 8.94:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.140) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.34:1 |
| White text | 8.94:1 |
Values
| HEX | #57378F |
| RGB | rgb(87, 55, 143) |
| HSL | hsl(262, 44%, 39%) |
| OKLCH | oklch(42.2% 0.14 296.7) |
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 #57378F | 8.94:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #57378F | 2.34:1 | Fails | Lc 13.8 | Not readable |
| #57378F text on white | 8.94:1 | AAA | Lc 90.1 | Preferred for body text |
| #57378F text on black | 2.34:1 | Fails | Lc -12.1 | 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
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#EBE7F8
oklch(93.6% 0.023 296.7)
-
Step 200
200
#DCD4F4
oklch(88.6% 0.044 296.9)
-
Step 300
300
#C5B6F0
oklch(80.9% 0.082 296.4)
-
Step 400
400
#A98EE8
oklch(70.7% 0.131 296.7)
-
Step 500
500
#956FE1
oklch(63.1% 0.167 296.7)
-
Step 600
600
#8054CE
oklch(55.5% 0.181 296.7)
-
Step 700
700
#6D44B3
oklch(49.2% 0.169 296.7)
-
Step 800
800 (this color)
#57378F
oklch(42.2% 0.14 296.7)
-
Step 900
900
#483273
oklch(37.7% 0.108 296.5)
-
Step 950
950
#2A1E44
oklch(27% 0.069 296)
#57378F 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) | #004A92 | 0.099 |
| Deuteranopia (no green cones) | #10488D | 0.093 |
| Tritanopia (no blue cones) | #4A4A5D | 0.109 |
| Achromatopsia (no color) | #494949 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57378F
#57378F
oklch(42.2% 0.14 296.7)
- #4B5400
#4B5400
oklch(42.3% 0.097 116.7)
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 #57378F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.030
- Rebecca Purple #663399 ΔE 0.033
- Blueberry #464196 ΔE 0.037
- Twilight #4E518B ΔE 0.069
- Chrysanthemum #560BAD ΔE 0.078
- Dusk #4E5481 ΔE 0.084
- Imperial Purple #480CA8 ΔE 0.084
- Cobalt #1E488F ΔE 0.085
Use #57378F 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.