#513F80
Closest named color: Dark Slate Blue (#483D8B). oklch(41.9% 0.106 294.1), rgb(81, 63, 128).
Aa
White text reads best on this color (8.85:1).
About this color
#513F80 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.106 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 0.026 away. White text reads best on it, at 8.85:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.106) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.37:1 |
| White text | 8.85:1 |
Values
| HEX | #513F80 |
| RGB | rgb(81, 63, 128) |
| HSL | hsl(257, 34%, 37%) |
| OKLCH | oklch(41.9% 0.106 294.1) |
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 #513F80 | 8.85:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #513F80 | 2.37:1 | Fails | Lc 13.9 | Not readable |
| #513F80 text on white | 8.85:1 | AAA | Lc 90.1 | Preferred for body text |
| #513F80 text on black | 2.37:1 | Fails | Lc -12.2 | 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
#F5F4FB
oklch(97% 0.009 292.8)
-
Step 100
100
#EAE8F5
oklch(93.6% 0.018 293.1)
-
Step 200
200
#DAD5EE
oklch(88.5% 0.034 294.9)
-
Step 300
300
#C2BAE5
oklch(81% 0.061 293.5)
-
Step 400
400
#A494D8
oklch(70.6% 0.099 294.5)
-
Step 500
500
#8E79CE
oklch(63.1% 0.126 293.8)
-
Step 600
600
#7960BB
oklch(55.6% 0.138 294.1)
-
Step 700
700
#664FA1
oklch(49.1% 0.128 294.1)
-
Step 800
800 (this color)
#513F80
oklch(41.9% 0.106 294.1)
-
Step 900
900
#443869
oklch(37.7% 0.082 293.3)
-
Step 950
950
#28213D
oklch(27% 0.052 294.2)
#513F80 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) | #274B82 | 0.063 |
| Deuteranopia (no green cones) | #2B497E | 0.059 |
| Tritanopia (no blue cones) | #464C59 | 0.086 |
| Achromatopsia (no color) | #4A4A4A | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #513F80
#513F80
oklch(41.9% 0.106 294.1)
- #4C5200
#4C5200
oklch(41.9% 0.095 114.5)
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 #513F80, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.026
- Blueberry #464196 ΔE 0.040
- Twilight #4E518B ΔE 0.049
- Dusk #4E5481 ΔE 0.058
- Rebecca Purple #663399 ΔE 0.062
- Cobalt #1E488F ΔE 0.071
- Dusk Blue #26538D ΔE 0.073
- Dusty Grape #545775 ΔE 0.076
Use #513F80 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.