#51487C
Closest named color: Twilight (#4E518B). oklch(43.5% 0.085 290.4), rgb(81, 72, 124).
Aa
White text reads best on this color (8.17:1).
About this color
#51487C is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.085 and its hue 290°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.031 away. White text reads best on it, at 8.17:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.085) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.56:1 |
| White text | 8.17:1 |
Values
| HEX | #51487C |
| RGB | rgb(81, 72, 124) |
| HSL | hsl(250, 27%, 38%) |
| OKLCH | oklch(43.5% 0.085 290.4) |
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 #51487C | 8.17:1 | AAA | Lc -92.8 | Preferred for body text |
| Black text on #51487C | 2.56:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #51487C text on white | 8.17:1 | AAA | Lc 88.2 | Fine for body text |
| #51487C text on black | 2.56:1 | Fails | Lc -14.0 | 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
#E9E8F3
oklch(93.5% 0.015 290.3)
-
Step 200
200
#D8D6EA
oklch(88.4% 0.027 290.4)
-
Step 300
300
#C0BCDF
oklch(81% 0.049 290.5)
-
Step 400
400
#A098CF
oklch(70.6% 0.08 290.9)
-
Step 500
500
#897EC2
oklch(63% 0.101 290.6)
-
Step 600
600
#7367AF
oklch(55.6% 0.11 290)
-
Step 700
700
#615596
oklch(49.1% 0.102 290.6)
-
Step 800
800 (this color)
#51487C
oklch(43.5% 0.085 290.4)
-
Step 900
900
#413B62
oklch(37.7% 0.066 289.9)
-
Step 950
950
#262339
oklch(27% 0.04 289.7)
#51487C 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) | #38507E | 0.040 |
| Deuteranopia (no green cones) | #384E7B | 0.039 |
| Tritanopia (no blue cones) | #47525C | 0.071 |
| Achromatopsia (no color) | #4F4F4F | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51487C
#51487C
oklch(43.5% 0.085 290.4)
- #545514
#545514
oklch(43.5% 0.084 110.3)
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 #51487C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.031
- Dusk #4E5481 ΔE 0.033
- Dark Slate Blue #483D8B ΔE 0.046
- Dusty Grape #545775 ΔE 0.049
- Blueberry #464196 ΔE 0.053
- YInMn Blue #415A77 ΔE 0.058
- Dusk Blue #26538D ΔE 0.062
- Denim Blue #3B5B92 ΔE 0.062
Use #51487C 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.