#513D91
Closest named color: Dark Slate Blue (#483D8B). oklch(42.7% 0.133 290.6), rgb(81, 61, 145).
Aa
White text reads best on this color (8.65:1).
About this color
#513D91 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.133 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.018 away. White text reads best on it, at 8.65:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.133) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.42:1 |
| White text | 8.65:1 |
Values
| HEX | #513D91 |
| RGB | rgb(81, 61, 145) |
| HSL | hsl(254, 41%, 40%) |
| OKLCH | oklch(42.7% 0.133 290.6) |
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 #513D91 | 8.65:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #513D91 | 2.42:1 | Fails | Lc 14.6 | Not readable |
| #513D91 text on white | 8.65:1 | AAA | Lc 89.4 | Fine for body text |
| #513D91 text on black | 2.42:1 | Fails | Lc -12.8 | 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
#E9E8F8
oklch(93.6% 0.021 288.9)
-
Step 200
200
#D8D5F4
oklch(88.5% 0.042 289.9)
-
Step 300
300
#C0B8F0
oklch(80.8% 0.079 291.1)
-
Step 400
400
#A192E8
oklch(70.7% 0.124 290.9)
-
Step 500
500
#8B74E1
oklch(63% 0.159 290.8)
-
Step 600
600
#765ACF
oklch(55.5% 0.173 290.7)
-
Step 700
700
#6349B3
oklch(49% 0.161 290.5)
-
Step 800
800 (this color)
#513D91
oklch(42.7% 0.133 290.6)
-
Step 900
900
#433574
oklch(37.8% 0.104 290.8)
-
Step 950
950
#272044
oklch(27.1% 0.065 290.3)
#513D91 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) | #0C4D94 | 0.081 |
| Deuteranopia (no green cones) | #124A8F | 0.078 |
| Tritanopia (no blue cones) | #3F4F61 | 0.107 |
| Achromatopsia (no color) | #4B4B4B | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #513D91
#513D91
oklch(42.7% 0.133 290.6)
- #525300
#525300
oklch(42.7% 0.094 110.6)
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 #513D91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.018
- Blueberry #464196 ΔE 0.021
- Rebecca Purple #663399 ΔE 0.044
- Twilight #4E518B ΔE 0.055
- Cobalt #1E488F ΔE 0.070
- Dusk #4E5481 ΔE 0.072
- Dusk Blue #26538D ΔE 0.077
- Denim Blue #3B5B92 ΔE 0.083
Use #513D91 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.