#513E91
Closest named color: Dark Slate Blue (#483D8B). oklch(42.9% 0.131 290.3), rgb(81, 62, 145).
Aa
White text reads best on this color (8.57:1).
About this color
#513E91 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.131 and its hue 290°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.019 away. White text reads best on it, at 8.57:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.131) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.44:1 |
| White text | 8.57:1 |
Values
| HEX | #513E91 |
| RGB | rgb(81, 62, 145) |
| HSL | hsl(254, 40%, 41%) |
| OKLCH | oklch(42.9% 0.131 290.3) |
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 #513E91 | 8.57:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #513E91 | 2.44:1 | Fails | Lc 14.8 | Not readable |
| #513E91 text on white | 8.57:1 | AAA | Lc 89.2 | Fine for body text |
| #513E91 text on black | 2.44:1 | Fails | Lc -13.0 | 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
#C0B9EF
oklch(81% 0.076 290.5)
-
Step 400
400
#A092E8
oklch(70.6% 0.124 290.3)
-
Step 500
500
#8A75E0
oklch(63% 0.157 290.2)
-
Step 600
600
#755BCE
oklch(55.6% 0.171 290.1)
-
Step 700
700
#634AB2
oklch(49.1% 0.158 290.4)
-
Step 800
800 (this color)
#513E91
oklch(42.9% 0.131 290.3)
-
Step 900
900
#423573
oklch(37.6% 0.103 290.2)
-
Step 950
950
#272043
oklch(27.1% 0.064 290.7)
#513E91 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) | #104E94 | 0.079 |
| Deuteranopia (no green cones) | #144A8F | 0.076 |
| Tritanopia (no blue cones) | #3F5061 | 0.108 |
| Achromatopsia (no color) | #4C4C4C | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #513E91
#513E91
oklch(42.9% 0.131 290.3)
- #535300
#535300
oklch(42.8% 0.093 109.8)
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 #513E91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.019
- Blueberry #464196 ΔE 0.020
- Rebecca Purple #663399 ΔE 0.045
- Twilight #4E518B ΔE 0.053
- Cobalt #1E488F ΔE 0.069
- Dusk #4E5481 ΔE 0.070
- Dusk Blue #26538D ΔE 0.075
- Denim Blue #3B5B92 ΔE 0.081
Use #513E91 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.