#51407B
Closest named color: Dark Slate Blue (#483D8B). oklch(41.8% 0.097 295.2), rgb(81, 64, 123).
Aa
White text reads best on this color (8.86:1).
About this color
#51407B is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.097 and its hue 295°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.033 away. White text reads best on it, at 8.86:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.097) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.36:1 |
| White text | 8.86:1 |
Values
| HEX | #51407B |
| RGB | rgb(81, 64, 123) |
| HSL | hsl(257, 32%, 37%) |
| OKLCH | oklch(41.8% 0.097 295.2) |
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 #51407B | 8.86:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #51407B | 2.36:1 | Fails | Lc 13.8 | Not readable |
| #51407B text on white | 8.86:1 | AAA | Lc 90.2 | Preferred for body text |
| #51407B text on black | 2.36:1 | Fails | Lc -12.1 | 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
#F6F4FA
oklch(97% 0.008 301.4)
-
Step 100
100
#EAE8F4
oklch(93.6% 0.016 293.7)
-
Step 200
200
#DAD5EC
oklch(88.4% 0.032 295.7)
-
Step 300
300
#C3BAE2
oklch(80.9% 0.057 295.4)
-
Step 400
400
#A495D3
oklch(70.6% 0.091 295.1)
-
Step 500
500
#8F7AC8
oklch(63.1% 0.116 295.2)
-
Step 600
600
#7A62B4
oklch(55.6% 0.125 295.5)
-
Step 700
700
#66519B
oklch(49.1% 0.116 294.8)
-
Step 800
800 (this color)
#51407B
oklch(41.8% 0.097 295.2)
-
Step 900
900
#453965
oklch(37.8% 0.074 295.2)
-
Step 950
950
#28213B
oklch(26.9% 0.048 295.4)
#51407B 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) | #2D4A7D | 0.056 |
| Deuteranopia (no green cones) | #30497A | 0.053 |
| Tritanopia (no blue cones) | #484B57 | 0.078 |
| Achromatopsia (no color) | #4A4A4A | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51407B
#51407B
oklch(41.8% 0.097 295.2)
- #4B5200
#4B5200
oklch(41.8% 0.095 115.3)
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 #51407B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.033
- Blueberry #464196 ΔE 0.048
- Twilight #4E518B ΔE 0.049
- Dusk #4E5481 ΔE 0.055
- Rebecca Purple #663399 ΔE 0.070
- Dusty Grape #545775 ΔE 0.071
- Cobalt #1E488F ΔE 0.073
- Dusk Blue #26538D ΔE 0.073
Use #51407B 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.