#513B8B
Closest named color: Dark Slate Blue (#483D8B). oklch(41.9% 0.128 292.7), rgb(81, 59, 139).
Aa
White text reads best on this color (8.94:1).
About this color
#513B8B is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.128 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.016 away. White text reads best on it, at 8.94:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.128) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.34:1 |
| White text | 8.94:1 |
Values
| HEX | #513B8B |
| RGB | rgb(81, 59, 139) |
| HSL | hsl(257, 40%, 39%) |
| OKLCH | oklch(41.9% 0.128 292.7) |
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 #513B8B | 8.94:1 | AAA | Lc -94.7 | Preferred for body text |
| Black text on #513B8B | 2.34:1 | Fails | Lc 13.7 | Not readable |
| #513B8B text on white | 8.94:1 | AAA | Lc 90.2 | Preferred for body text |
| #513B8B 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#EAE8F7
oklch(93.7% 0.02 292.1)
-
Step 200
200
#D9D5F3
oklch(88.5% 0.041 291.7)
-
Step 300
300
#C2B8ED
oklch(80.9% 0.075 293.3)
-
Step 400
400
#A392E4
oklch(70.7% 0.119 292.6)
-
Step 500
500
#8E75DC
oklch(63.2% 0.151 292.7)
-
Step 600
600
#795BCA
oklch(55.6% 0.165 292.7)
-
Step 700
700
#664AAF
oklch(49.2% 0.154 292.6)
-
Step 800
800 (this color)
#513B8B
oklch(41.9% 0.128 292.7)
-
Step 900
900
#443571
oklch(37.7% 0.1 292.5)
-
Step 950
950
#282042
oklch(27.1% 0.062 292.6)
#513B8B 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) | #114B8E | 0.081 |
| Deuteranopia (no green cones) | #184889 | 0.077 |
| Tritanopia (no blue cones) | #424C5D | 0.102 |
| Achromatopsia (no color) | #494949 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #513B8B
#513B8B
oklch(41.9% 0.128 292.7)
- #4E5200
#4E5200
oklch(42.1% 0.094 113)
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 #513B8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.016
- Blueberry #464196 ΔE 0.028
- Rebecca Purple #663399 ΔE 0.047
- Twilight #4E518B ΔE 0.058
- Cobalt #1E488F ΔE 0.071
- Dusk #4E5481 ΔE 0.073
- Dusk Blue #26538D ΔE 0.080
- Denim Blue #3B5B92 ΔE 0.087
Use #513B8B 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.