#513B90
Closest named color: Dark Slate Blue (#483D8B). oklch(42.3% 0.135 291.5), rgb(81, 59, 144).
Aa
White text reads best on this color (8.83:1).
About this color
#513B90 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.135 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 0.018 away. White text reads best on it, at 8.83:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.135) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.37:1 |
| White text | 8.83:1 |
Values
| HEX | #513B90 |
| RGB | rgb(81, 59, 144) |
| HSL | hsl(256, 42%, 40%) |
| OKLCH | oklch(42.3% 0.135 291.5) |
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 #513B90 | 8.83:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #513B90 | 2.37:1 | Fails | Lc 14.1 | Not readable |
| #513B90 text on white | 8.83:1 | AAA | Lc 89.9 | Fine for body text |
| #513B90 text on black | 2.37:1 | Fails | Lc -12.4 | 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
#EAE7F8
oklch(93.5% 0.023 294.1)
-
Step 200
200
#D9D5F4
oklch(88.6% 0.042 291.4)
-
Step 300
300
#C1B8F0
oklch(80.9% 0.079 291.9)
-
Step 400
400
#A291E8
oklch(70.6% 0.126 291.8)
-
Step 500
500
#8C74E2
oklch(63.2% 0.161 291.1)
-
Step 600
600
#7859CF
oklch(55.6% 0.175 291.8)
-
Step 700
700
#6548B4
oklch(49.1% 0.164 291.6)
-
Step 800
800 (this color)
#513B90
oklch(42.3% 0.135 291.5)
-
Step 900
900
#443474
oklch(37.7% 0.106 292.1)
-
Step 950
950
#271F44
oklch(26.9% 0.067 291.2)
#513B90 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) | #054C93 | 0.085 |
| Deuteranopia (no green cones) | #0E488E | 0.081 |
| Tritanopia (no blue cones) | #3F4E5F | 0.110 |
| Achromatopsia (no color) | #4A4A4A | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #513B90
#513B90
oklch(42.3% 0.135 291.5)
- #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 #513B90, 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 0.024
- Rebecca Purple #663399 ΔE 0.043
- Twilight #4E518B ΔE 0.060
- Cobalt #1E488F ΔE 0.071
- Dusk #4E5481 ΔE 0.076
- Dusk Blue #26538D ΔE 0.080
- Sapphire #2138AB ΔE 0.083
Use #513B90 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.