#51448A
Closest named color: Dark Slate Blue (#483D8B). oklch(43.5% 0.112 289.4), rgb(81, 68, 138).
Aa
White text reads best on this color (8.25:1).
About this color
#51448A is a dark, moderately saturated purple. In OKLCH its lightness is 44%, its chroma 0.112 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.026 away. White text reads best on it, at 8.25:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.54:1 |
| White text | 8.25:1 |
Values
| HEX | #51448A |
| RGB | rgb(81, 68, 138) |
| HSL | hsl(251, 34%, 40%) |
| OKLCH | oklch(43.5% 0.112 289.4) |
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 #51448A | 8.25:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #51448A | 2.54:1 | Fails | Lc 15.6 | Dividers and decoration only |
| #51448A text on white | 8.25:1 | AAA | Lc 88.4 | Fine for body text |
| #51448A text on black | 2.54:1 | Fails | Lc -13.8 | 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
#F5F5FB
oklch(97.2% 0.008 286.3)
-
Step 100
100
#E9E8F6
oklch(93.6% 0.019 289.3)
-
Step 200
200
#D8D6F0
oklch(88.6% 0.036 289.2)
-
Step 300
300
#BFBAE9
oklch(80.9% 0.066 289.7)
-
Step 400
400
#9F95DE
oklch(70.6% 0.106 289.7)
-
Step 500
500
#887AD4
oklch(63.1% 0.133 289.2)
-
Step 600
600
#7361C2
oklch(55.6% 0.146 289.3)
-
Step 700
700
#6150A7
oklch(49.2% 0.134 289.5)
-
Step 800
800 (this color)
#51448A
oklch(43.5% 0.112 289.4)
-
Step 900
900
#41386C
oklch(37.6% 0.087 289.5)
-
Step 950
950
#26213F
oklch(26.9% 0.055 289.9)
#51448A 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) | #28508C | 0.059 |
| Deuteranopia (no green cones) | #294D88 | 0.057 |
| Tritanopia (no blue cones) | #415260 | 0.093 |
| Achromatopsia (no color) | #4F4F4F | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51448A
#51448A
oklch(43.5% 0.112 289.4)
- #555500
#555500
oklch(43.5% 0.095 109.8)
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 #51448A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.026
- Blueberry #464196 ΔE 0.029
- Twilight #4E518B ΔE 0.035
- Dusk #4E5481 ΔE 0.050
- Rebecca Purple #663399 ΔE 0.058
- Dusk Blue #26538D ΔE 0.064
- Cobalt #1E488F ΔE 0.065
- Denim Blue #3B5B92 ΔE 0.066
Use #51448A 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.