#51447D
Closest named color: Dark Slate Blue (#483D8B). oklch(42.7% 0.093 292.5), rgb(81, 68, 125).
Aa
White text reads best on this color (8.49:1).
About this color
#51447D is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.093 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.037 away. White text reads best on it, at 8.49:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.093) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.47:1 |
| White text | 8.49:1 |
Values
| HEX | #51447D |
| RGB | rgb(81, 68, 125) |
| HSL | hsl(254, 30%, 38%) |
| OKLCH | oklch(42.7% 0.093 292.5) |
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 #51447D | 8.49:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #51447D | 2.47:1 | Fails | Lc 14.9 | Not readable |
| #51447D text on white | 8.49:1 | AAA | Lc 89.1 | Fine for body text |
| #51447D text on black | 2.47:1 | Fails | Lc -13.1 | 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 800.
-
Step 50
50
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#EAE8F4
oklch(93.6% 0.016 293.7)
-
Step 200
200
#D9D6EC
oklch(88.5% 0.03 292)
-
Step 300
300
#C1BBE1
oklch(80.9% 0.053 292.4)
-
Step 400
400
#A297D2
oklch(70.7% 0.086 292.6)
-
Step 500
500
#8C7CC7
oklch(63.1% 0.112 292.7)
-
Step 600
600
#7664B3
oklch(55.6% 0.12 292.5)
-
Step 700
700
#63539A
oklch(49.1% 0.111 292.2)
-
Step 800
800 (this color)
#51447D
oklch(42.7% 0.093 292.5)
-
Step 900
900
#433A64
oklch(37.8% 0.071 292.5)
-
Step 950
950
#27223B
oklch(27% 0.046 292.2)
#51447D 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) | #324E7F | 0.050 |
| Deuteranopia (no green cones) | #334C7C | 0.047 |
| Tritanopia (no blue cones) | #474F5A | 0.077 |
| Achromatopsia (no color) | #4D4D4D | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51447D
#51447D
oklch(42.7% 0.093 292.5)
- #505404
#505404
oklch(42.8% 0.093 112.9)
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 #51447D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.037
- Twilight #4E518B ΔE 0.039
- Dusk #4E5481 ΔE 0.044
- Blueberry #464196 ΔE 0.047
- Dusty Grape #545775 ΔE 0.061
- Dusk Blue #26538D ΔE 0.066
- YInMn Blue #415A77 ΔE 0.070
- Denim Blue #3B5B92 ΔE 0.070
Use #51447D 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.