#513B66
Closest named color: Dark Slate Blue (#483D8B). oklch(39.6% 0.075 306.8), rgb(81, 59, 102).
Aa
White text reads best on this color (9.68:1).
About this color
#513B66 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.075 and its hue 307°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.064 away. White text reads best on it, at 9.68:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.075) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.16:1 |
| White text | 9.68:1 |
Values
| HEX | #513B66 |
| RGB | rgb(81, 59, 102) |
| HSL | hsl(271, 27%, 32%) |
| OKLCH | oklch(39.6% 0.075 306.8) |
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 #513B66 | 9.68:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #513B66 | 2.16:1 | Fails | Lc 11.6 | Not readable |
| #513B66 text on white | 9.68:1 | AAA | Lc 92.4 | Preferred for body text |
| #513B66 text on black | 2.16:1 | Fails | Lc -10.1 | 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 900.
-
Step 50
50
#F7F4F9
oklch(97.1% 0.007 312.3)
-
Step 100
100
#EDE7F3
oklch(93.6% 0.017 308.3)
-
Step 200
200
#DED4EA
oklch(88.5% 0.032 306.2)
-
Step 300
300
#CAB8DE
oklch(81% 0.056 306.6)
-
Step 400
400
#AF92CD
oklch(70.7% 0.09 306.7)
-
Step 500
500
#9C76C0
oklch(63.2% 0.115 307)
-
Step 600
600
#865DAC
oklch(55.5% 0.126 306.7)
-
Step 700
700
#724D94
oklch(49.2% 0.116 306.7)
-
Step 800
800
#5D3F78
oklch(42.7% 0.097 307)
-
Step 900
900 (this color)
#513B66
oklch(39.6% 0.075 306.8)
-
Step 950
950
#2C2039
oklch(27% 0.048 305.5)
#513B66 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) | #324468 | 0.053 |
| Deuteranopia (no green cones) | #374565 | 0.049 |
| Tritanopia (no blue cones) | #4E424B | 0.057 |
| Achromatopsia (no color) | #444444 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #513B66
#513B66
oklch(39.6% 0.075 306.8)
- #3C4E1E
#3C4E1E
oklch(39.7% 0.075 126.7)
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 #513B66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.064
- Dark Grey Blue #29465B ΔE 0.072
- Dusk #4E5481 ΔE 0.075
- Purple Brown #673A3F ΔE 0.077
- Twilight #4E518B ΔE 0.077
- Charcoal Grey #3C4142 ΔE 0.080
- Dusty Grape #545775 ΔE 0.080
- Blueberry #464196 ΔE 0.081
Use #513B66 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.