#51408C
Closest named color: Dark Slate Blue (#483D8B). oklch(42.9% 0.121 290.7), rgb(81, 64, 140).
Aa
White text reads best on this color (8.52:1).
About this color
#51408C is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.121 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.018 away. White text reads best on it, at 8.52:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.121) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.46:1 |
| White text | 8.52:1 |
Values
| HEX | #51408C |
| RGB | rgb(81, 64, 140) |
| HSL | hsl(253, 37%, 40%) |
| OKLCH | oklch(42.9% 0.121 290.7) |
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 #51408C | 8.52:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #51408C | 2.46:1 | Fails | Lc 14.9 | Not readable |
| #51408C text on white | 8.52:1 | AAA | Lc 89.1 | Fine for body text |
| #51408C text on black | 2.46:1 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#E9E8F7
oklch(93.6% 0.02 289.1)
-
Step 200
200
#D8D5F2
oklch(88.4% 0.04 290.3)
-
Step 300
300
#C0B9EC
oklch(80.9% 0.072 291)
-
Step 400
400
#A094E2
oklch(70.7% 0.113 290.3)
-
Step 500
500
#8A77DA
oklch(63.1% 0.146 290.4)
-
Step 600
600
#755EC7
oklch(55.6% 0.157 290.4)
-
Step 700
700
#634DAC
oklch(49.2% 0.146 290.7)
-
Step 800
800 (this color)
#51408C
oklch(42.9% 0.121 290.7)
-
Step 900
900
#42376F
oklch(37.7% 0.093 290.2)
-
Step 950
950
#272041
oklch(26.9% 0.06 291.6)
#51408C 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) | #1E4E8F | 0.070 |
| Deuteranopia (no green cones) | #204B8A | 0.067 |
| Tritanopia (no blue cones) | #41505F | 0.100 |
| Achromatopsia (no color) | #4C4C4C | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51408C
#51408C
oklch(42.9% 0.121 290.7)
- #525400
#525400
oklch(43% 0.095 111.4)
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 #51408C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.018
- Blueberry #464196 ΔE 0.024
- Twilight #4E518B ΔE 0.046
- Rebecca Purple #663399 ΔE 0.051
- Dusk #4E5481 ΔE 0.061
- Cobalt #1E488F ΔE 0.067
- Dusk Blue #26538D ΔE 0.071
- Denim Blue #3B5B92 ΔE 0.076
Use #51408C 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.