#513D78
Closest named color: Dark Slate Blue (#483D8B). oklch(41% 0.097 297.6), rgb(81, 61, 120).
Aa
White text reads best on this color (9.17:1).
About this color
#513D78 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.097 and its hue 298°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.035 away. White text reads best on it, at 9.17:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.097) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.28:1 |
| White text | 9.17:1 |
Values
| HEX | #513D78 |
| RGB | rgb(81, 61, 120) |
| HSL | hsl(260, 33%, 35%) |
| OKLCH | oklch(41% 0.097 297.6) |
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 #513D78 | 9.17:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #513D78 | 2.28:1 | Fails | Lc 13.0 | Not readable |
| #513D78 text on white | 9.17:1 | AAA | Lc 91.0 | Preferred for body text |
| #513D78 text on black | 2.28:1 | Fails | Lc -11.3 | 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
#F6F4FA
oklch(97% 0.008 301.4)
-
Step 100
100
#EBE8F4
oklch(93.7% 0.016 297.5)
-
Step 200
200
#DBD5EC
oklch(88.5% 0.032 297.7)
-
Step 300
300
#C4B9E1
oklch(80.8% 0.057 297.7)
-
Step 400
400
#A795D3
oklch(70.8% 0.091 297.4)
-
Step 500
500
#9279C7
oklch(63.1% 0.117 297.7)
-
Step 600
600
#7C61B3
oklch(55.6% 0.126 297.3)
-
Step 700
700
#69509A
oklch(49.1% 0.117 297.5)
-
Step 800
800 (this color)
#513D78
oklch(41% 0.097 297.6)
-
Step 900
900
#463865
oklch(37.7% 0.076 296.9)
-
Step 950
950
#29213B
oklch(27% 0.048 297.2)
#513D78 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) | #2A487A | 0.061 |
| Deuteranopia (no green cones) | #2E4777 | 0.057 |
| Tritanopia (no blue cones) | #494854 | 0.078 |
| Achromatopsia (no color) | #484848 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #513D78
#513D78
oklch(41% 0.097 297.6)
- #475100
#475100
oklch(41.2% 0.095 117.6)
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 #513D78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.035
- Blueberry #464196 ΔE 0.052
- Twilight #4E518B ΔE 0.058
- Dusk #4E5481 ΔE 0.063
- Rebecca Purple #663399 ΔE 0.071
- Cobalt #1E488F ΔE 0.077
- Dusty Grape #545775 ΔE 0.077
- Dusk Blue #26538D ΔE 0.080
Use #513D78 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.