#57317E
Closest named color: Dark Slate Blue (#483D8B). oklch(40% 0.127 304), rgb(87, 49, 126).
Aa
White text reads best on this color (9.78:1).
About this color
#57317E is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.127 and its hue 304°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.042 away. White text reads best on it, at 9.78:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.127) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.14:1 |
| White text | 9.78:1 |
Values
| HEX | #57317E |
| RGB | rgb(87, 49, 126) |
| HSL | hsl(270, 44%, 34%) |
| OKLCH | oklch(40% 0.127 304) |
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 #57317E | 9.78:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #57317E | 2.14:1 | Fails | Lc 11.6 | Not readable |
| #57317E text on white | 9.78:1 | AAA | Lc 92.3 | Preferred for body text |
| #57317E text on black | 2.14:1 | Fails | Lc -10.1 | 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 900.
-
Step 50
50
#F7F3FD
oklch(97% 0.014 304.1)
-
Step 100
100
#EEE6F9
oklch(93.7% 0.027 304.8)
-
Step 200
200
#E0D1F6
oklch(88.4% 0.053 303.7)
-
Step 300
300
#CEB2F3
oklch(81% 0.095 304.1)
-
Step 400
400
#B586ED
oklch(70.6% 0.152 303.8)
-
Step 500
500
#A463E7
oklch(63.1% 0.195 304.1)
-
Step 600
600
#9045D5
oklch(55.6% 0.212 304.2)
-
Step 700
700
#7A35B9
oklch(49.1% 0.197 303.7)
-
Step 800
800
#632D95
oklch(42.6% 0.163 304)
-
Step 900
900 (this color)
#57317E
oklch(40% 0.127 304)
-
Step 950
950
#2F1A46
oklch(27% 0.081 303.5)
#57317E 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) | #0D4380 | 0.102 |
| Deuteranopia (no green cones) | #1F447C | 0.092 |
| Tritanopia (no blue cones) | #504052 | 0.094 |
| Achromatopsia (no color) | #444444 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57317E
#57317E
oklch(40% 0.127 304)
- #3D5000
#3D5000
oklch(40% 0.099 123.8)
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 #57317E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.042
- Rebecca Purple #663399 ΔE 0.052
- Blueberry #464196 ΔE 0.059
- Indigo #4B0082 ΔE 0.080
- Twilight #4E518B ΔE 0.083
- Royal Purple #4B006E ΔE 0.089
- Grape Purple #5D1451 ΔE 0.090
- Chrysanthemum #560BAD ΔE 0.092
Use #57317E 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.