#51427E
Closest named color: Dark Slate Blue (#483D8B). oklch(42.4% 0.098 293.3), rgb(81, 66, 126).
Aa
White text reads best on this color (8.64:1).
About this color
#51427E is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.098 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 0.032 away. White text reads best on it, at 8.64:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.098) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.43:1 |
| White text | 8.64:1 |
Values
| HEX | #51427E |
| RGB | rgb(81, 66, 126) |
| HSL | hsl(255, 31%, 38%) |
| OKLCH | oklch(42.4% 0.098 293.3) |
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 #51427E | 8.64:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #51427E | 2.43:1 | Fails | Lc 14.4 | Not readable |
| #51427E text on white | 8.64:1 | AAA | Lc 89.5 | Fine for body text |
| #51427E text on black | 2.43:1 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#EAE8F4
oklch(93.6% 0.016 293.7)
-
Step 200
200
#D9D6ED
oklch(88.5% 0.031 291.7)
-
Step 300
300
#C2BAE3
oklch(80.9% 0.058 294)
-
Step 400
400
#A396D5
oklch(70.8% 0.092 293.4)
-
Step 500
500
#8D7BC9
oklch(63.1% 0.116 293.4)
-
Step 600
600
#7763B6
oklch(55.6% 0.126 292.9)
-
Step 700
700
#65519D
oklch(49.1% 0.119 293.7)
-
Step 800
800 (this color)
#51427E
oklch(42.4% 0.098 293.3)
-
Step 900
900
#443966
oklch(37.8% 0.076 293.7)
-
Step 950
950
#27223C
oklch(27.1% 0.048 291.7)
#51427E 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) | #2E4C80 | 0.054 |
| Deuteranopia (no green cones) | #304B7D | 0.052 |
| Tritanopia (no blue cones) | #464D5A | 0.078 |
| Achromatopsia (no color) | #4C4C4C | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51427E
#51427E
oklch(42.4% 0.098 293.3)
- #4F5300
#4F5300
oklch(42.4% 0.095 113)
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 #51427E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.032
- Twilight #4E518B ΔE 0.043
- Blueberry #464196 ΔE 0.044
- Dusk #4E5481 ΔE 0.050
- Dusty Grape #545775 ΔE 0.067
- Rebecca Purple #663399 ΔE 0.068
- Dusk Blue #26538D ΔE 0.069
- Cobalt #1E488F ΔE 0.070
Use #51427E 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.