#513A91
Closest named color: Dark Slate Blue (#483D8B). oklch(42.2% 0.137 291.6), rgb(81, 58, 145).
Aa
White text reads best on this color (8.88:1).
About this color
#513A91 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.137 and its hue 292°. 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 8.88:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.137) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.36:1 |
| White text | 8.88:1 |
Values
| HEX | #513A91 |
| RGB | rgb(81, 58, 145) |
| HSL | hsl(256, 43%, 40%) |
| OKLCH | oklch(42.2% 0.137 291.6) |
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 #513A91 | 8.88:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #513A91 | 2.36:1 | Fails | Lc 14.0 | Not readable |
| #513A91 text on white | 8.88:1 | AAA | Lc 90.0 | Preferred for body text |
| #513A91 text on black | 2.36:1 | Fails | Lc -12.3 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#EAE7F9
oklch(93.6% 0.024 293.6)
-
Step 200
200
#D9D4F5
oklch(88.4% 0.045 292.4)
-
Step 300
300
#C1B8F1
oklch(81% 0.08 291.7)
-
Step 400
400
#A291EA
oklch(70.7% 0.128 291.5)
-
Step 500
500
#8D73E3
oklch(63.1% 0.164 291.7)
-
Step 600
600
#7858D1
oklch(55.5% 0.179 291.7)
-
Step 700
700
#6547B5
oklch(49% 0.166 291.6)
-
Step 800
800 (this color)
#513A91
oklch(42.2% 0.137 291.6)
-
Step 900
900
#443475
oklch(37.8% 0.107 291.8)
-
Step 950
950
#271F44
oklch(26.9% 0.067 291.2)
#513A91 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) | #004B94 | 0.087 |
| Deuteranopia (no green cones) | #07488F | 0.084 |
| Tritanopia (no blue cones) | #3F4D5F | 0.111 |
| Achromatopsia (no color) | #4A4A4A | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #513A91
#513A91
oklch(42.2% 0.137 291.6)
- #505200
#505200
oklch(42.3% 0.093 111.4)
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 #513A91, 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 0.024
- Rebecca Purple #663399 ΔE 0.042
- Twilight #4E518B ΔE 0.062
- Cobalt #1E488F ΔE 0.073
- Dusk #4E5481 ΔE 0.079
- Chrysanthemum #560BAD ΔE 0.080
- Sapphire #2138AB ΔE 0.082
Use #513A91 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.