#513F88
Closest named color: Dark Slate Blue (#483D8B). oklch(42.4% 0.117 292), rgb(81, 63, 136).
Aa
White text reads best on this color (8.69:1).
About this color
#513F88 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.117 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 8.69:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.117) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.41:1 |
| White text | 8.69:1 |
Values
| HEX | #513F88 |
| RGB | rgb(81, 63, 136) |
| HSL | hsl(255, 37%, 39%) |
| OKLCH | oklch(42.4% 0.117 292) |
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 #513F88 | 8.69:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #513F88 | 2.41:1 | Fails | Lc 14.4 | Not readable |
| #513F88 text on white | 8.69:1 | AAA | Lc 89.6 | Fine for body text |
| #513F88 text on black | 2.41:1 | Fails | Lc -12.7 | 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
#F5F4FB
oklch(97% 0.009 292.8)
-
Step 100
100
#EAE8F6
oklch(93.7% 0.019 292.6)
-
Step 200
200
#D9D5F1
oklch(88.5% 0.038 292.2)
-
Step 300
300
#C1B9EA
oklch(80.9% 0.069 292.3)
-
Step 400
400
#A294DF
oklch(70.8% 0.109 291.9)
-
Step 500
500
#8C77D6
oklch(63% 0.14 292.1)
-
Step 600
600
#775EC4
oklch(55.6% 0.153 292)
-
Step 700
700
#644DA9
oklch(49.1% 0.142 291.8)
-
Step 800
800 (this color)
#513F88
oklch(42.4% 0.117 292)
-
Step 900
900
#43376D
oklch(37.7% 0.09 291.7)
-
Step 950
950
#272040
oklch(26.9% 0.058 292.1)
#513F88 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) | #204C8B | 0.068 |
| Deuteranopia (no green cones) | #234A86 | 0.066 |
| Tritanopia (no blue cones) | #434E5D | 0.095 |
| Achromatopsia (no color) | #4B4B4B | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #513F88
#513F88
oklch(42.4% 0.117 292)
- #505300
#505300
oklch(42.5% 0.094 112.2)
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 #513F88, 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 0.029
- Twilight #4E518B ΔE 0.048
- Rebecca Purple #663399 ΔE 0.053
- Dusk #4E5481 ΔE 0.061
- Cobalt #1E488F ΔE 0.068
- Dusk Blue #26538D ΔE 0.072
- Denim Blue #3B5B92 ΔE 0.078
Use #513F88 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.